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RUNNING ORACLE REAL
APPLICATION CLUSTERS (RAC)
ON SUN™ LOGICAL DOMAINS
Alexandre Chartre, Sun Microsystems, Inc.
Daniel Dibbets, Oracle Corporation
Roman Ivanov, Sun Microsystems, Inc.

Sun BluePrints™ Online
Part No 820-7931-10
Revision 1.0, 05/28/09
Sun Microsystems, Inc.




Table of Contents

Running Oracle Real Application Clusters (RAC) on Sun™ Logical Domains ............. 1
Introduction ....................................................................................................... 1
   Logical domains overview................................................................................ 2
   Oracle RAC nodes ............................................................................................ 4
   Deployment options ........................................................................................ 4
Software requirements........................................................................................ 5
   Logical Domains requirements ......................................................................... 5
Hardware configuration ...................................................................................... 6
Server configuration ........................................................................................... 8
   Configuration guidelines ................................................................................. 8
   Configuration details....................................................................................... 9
Software installation and configuration ............................................................. 11
   Solaris installation ........................................................................................ 11
   LDoms installation ........................................................................................ 11
   Control domain configuration ........................................................................ 12
   Guest domains .............................................................................................. 13
   Guest domain configuration .......................................................................... 14
Network configuration ...................................................................................... 16
   Network layout ............................................................................................. 16
   Network interfaces and host names ............................................................... 19
   Private network configuration ....................................................................... 22
Storage configuration ....................................................................................... 25
   Shared and virtual disks ............................................................................... 25
   Adding shared disks to guest domains ............................................................ 25
Oracle installation ............................................................................................ 27
Additional information ...................................................................................... 28
   NTP .............................................................................................................. 28
   CPU dynamic reconfiguration ........................................................................ 28
   Performance considerations .......................................................................... 29
   Known issues ................................................................................................ 29
   Workload used during the Oracle certification process .................................... 31
Summary ......................................................................................................... 31
Appendices ...................................................................................................... 32
   Firmware patches ......................................................................................... 32
   Logical Domains configuration example ......................................................... 33
About the authors ............................................................................................ 41
Acknowledgments ............................................................................................ 41
References ....................................................................................................... 41
Ordering Sun documents ................................................................................... 42
Accessing Sun documentation online ................................................................. 42
1       Running Oracle RAC on Sun Logical Domains                   Sun Microsystems, Inc.




Running Oracle Real Application Clusters (RAC) on
Sun™ Logical Domains

This article discusses running Oracle Real Application Clusters (RAC) on servers
configured with Sun™ Logical Domains (LDoms). Sun LDoms virtualization technology
allows the creation of multiple virtual systems on a single physical system, and
enables fine-grained assignment of CPU and memory resources to an Oracle RAC
workload. When deployed on Sun’s CoolThreads™ technology-based servers, with
up to 256 threads per system, this solution provides a powerful platform for both
development and production environments. In development environments, multiple
Oracle RAC nodes can be deployed on the same physical server to reduce hardware
costs, while a production environment can place each Oracle node on a separate
physical server for increased availability.

This paper addresses the following topics:
•	 “Introduction” on page 1 provides an overview of Oracle RAC and LDoms, and
   discusses the various deployment options for this solution.
•	 “Software requirements” on page 5 lists the software and firmware requirements,
   and “Hardware configuration” on page 6 describes the hardware used for an
   example configuration.
•	 “Software installation and configuration” on page 11, “Network configuration”
   on page 16, and “Storage configuration” on page 25 describe the steps necessary to
   install and configure an example configuration.
•	 “Additional information” on page 28 provides supplemental information, including
   performance considerations and known issues.


Introduction
Oracle Real Application Clusters (RAC)[1] is an option to the award-winning Oracle
Database Enterprise Edition. Oracle RAC is a cluster database with a shared cache
architecture that overcomes the limitations of traditional shared-nothing and
shared-disk approaches to provide highly scalable and available database solutions
for all your business applications. Oracle RAC is a key component of the Oracle
enterprise grid architecture.

Oracle RAC utilizes Oracle Clusterware[2] for the inter-node communication
required in clustered database environments. Oracle Clusterware is the technology
that transforms a server farm into a cluster. A cluster, in general, is a group of
independent servers that cooperate as a single system. Oracle Clusterware is the
intelligence in this system that ensures the required cooperation, and is a key
component of the Oracle enterprise grid architecture as well.
2       Running Oracle RAC on Sun Logical Domains                    Sun Microsystems, Inc.




                                                In a typical Oracle RAC installation, Oracle Automatic Storage Management (ASM)
                                                [3] acts as the underlying, clustered volume manager. ASM provides the database
                                                administrator with a simple storage management interface that is consistent across
                                                all server and storage platforms. As a vertically integrated file system and volume
                                                manager, purpose-built for Oracle database files, ASM provides the performance of
                                                raw I/O with the easy management of a file system. Oracle ASM provides the basis
                                                for a shared storage pool in Oracle enterprise grid architectures.

Sun Logical Domains allow the creation of       Sun Logical Domains (LDoms) is a virtualization and partitioning solution supported
multiple virtual systems on a single physical   on Sun CoolThreads technology-based servers — those powered by UltraSPARC®
system.                                         T1, T2, and T2 Plus processors with Chip Multithreading Technology (CMT). Sun
                                                LDoms allow the creation of multiple virtual systems on a single physical system.
                                                Each virtual system is called a logical domain and runs its own copy of the operating
                                                system. Sun’s CoolThreads technology-based servers, configured with up to 256
                                                virtual CPUs and 512 GB of physical memory, are powerful systems which can easily
                                                be configured with LDoms to consolidate and virtualize multiple physical servers
                                                onto a single platform.

                                                Oracle Database and Oracle Real Application Clusters (Oracle RAC) are the
                                                leading database applications, and as such are frequently used on servers. With
                                                virtualization and consolidation, Oracle Database and Oracle RAC can now run on
                                                selected certified virtual environments, such as Sun Logical Domains, and use virtual
                                                devices. In addition, multiple Oracle Database servers or Oracle RAC nodes can be
                                                located on the same physical platform, introducing a new way to deploy databases.

                                                Logical domains overview
A domain can take one or more of the            With LDoms, domains have roles which define their characteristics. The roles of a
following roles:                                domain depend on how the domain is configured, which resources it owns and what
•	 I/O Domain                                   services it provides. A single domain can have one or multiple roles. An Oracle RAC
•	 Control Domain
                                                node can be located on a domain with any role, as long as that domain provides
•	 Service Domain
•	 Guest Domain                                 the appropriate devices and resources required and supported by the Oracle
                                                environment.

                                                A logical domain can take one or more of the following roles:

Running Oracle RAC in an I/O domain can         •	 I/O Domain — An I/O domain is a domain that owns some physical I/O resources,
result in better performance, but only a           such as physical disks or physical network interfaces, and has direct access to
limited number of I/O domains can be               the corresponding physical I/O devices. In I/O domains, the operating system
created per server.
                                                   running in the domain uses regular (non-virtualized) drivers of the operating
                                                   system to access devices. Running the Solaris™ operating system (Solaris OS) in an
                                                   I/O domain is very similar to running the Solaris OS on a non-virtualized system.
                                                   Similarly, running and configuring Oracle RAC in an I/O domain is no different
                                                   than running and configuring Oracle RAC on any other Sun SPARC server.
3         Running Oracle RAC on Sun Logical Domains                    Sun Microsystems, Inc.




                                                  By having direct access to physical I/O devices, an I/O domain provides optimal
                                                  I/O performance. However, the number of I/O domains that can be created on
                                                  a single platform is limited by the I/O resources available on that platform; this
                                                  limit is currently tied to the number of PCI buses available. As a result, only a
                                                  limited number of I/O domains can be created. For example, a maximum of four
                                                  I/O domains can be created on the Sun SPARC Enterprise® T5440 server.

It is not generally recommended to run        •	 Control Domain — The control domain is the domain that runs the Logical
Oracle RAC in a control domain because of        Domains Manager software, which is used to configure and manage all domains
security concerns.                               on the platform. The control domain is usually also an I/O domain and, therefore,
                                                 running Oracle RAC in the control domain is similar to running Oracle RAC in
                                                 an I/O domain. However, for management and security concerns, it is not
                                                 recommended to run Oracle RAC in the control domain.
                                                  The control domain has a privileged connection with the hypervisor, which allows
                                                  it to control other domains. The security of the control domain should be carefully
                                                  protected; if control domain security is compromised, a malicious user gaining
                                                  privileged access on the control domain could take control of all other domains on
                                                  the platform. Any application running in the control domain should be properly
                                                  configured to prevent such security risks.

It is not generally recommended to            •	 Service Domain — A service domain is a domain that provides virtual device
run Oracle RAC in a service domain, for          services (such as virtual disk or virtual network service) to some other domains.
performance reasons and to avoid the
                                                 A service domain is usually also an I/O domain, therefore running Oracle RAC in
possibility of negatively affecting virtual
device services.                                 a service domain is similar to running Oracle RAC in an I/O domain. However, for
                                                 performance reasons and to avoid negatively affecting virtual device services,
                                                 running Oracle RAC in a service domain is not recommended.
                                                  A service domain will consume some CPU, memory and I/O resources to provide
                                                  services to other domains. Therefore, a service domain must be configured with
                                                  sufficient resources to handle the workload due to services provided to other
                                                  domains and for the workload generated by applications (such as Oracle RAC)
                                                  running on the domain itself.

                                                  Moreover, Oracle RAC can sometimes reboot the system it is running on. The
                                                  reboot of a service domain will not bring down or reset guest domains using that
                                                  service domain. However, I/O requests issued from these guest domains will be
                                                  suspended while the service domain is down, and they will automatically resume
                                                  once the service domain is up and running again. When running Oracle RAC in a
                                                  service domain, keep in mind that Oracle RAC might reboot that service domain
                                                  and that this action will temporary block I/O requests of guest domains using that
                                                  service domain.

Oracle RAC can run in a guest domain and      •	 Guest Domain — A guest domain is a domain which is not an I/O domain but
use virtual devices.                             which is a consumer of virtual device services provided by some service domains.
                                                 A guest domain does not have any physical I/O devices, but only virtual I/O
4         Running Oracle RAC on Sun Logical Domains                                    Sun Microsystems, Inc.




                                                devices such as virtual disks and virtual network interfaces. Oracle RAC can run in
                                                a guest domain and use virtual devices, and this configuration is the focus of this
                                                document.

                                            In addition, a system running LDoms will have a primary domain. The primary
                                            domain is not a domain role, but is the name of the first domain created on the
                                            system. The primary domain initially has the roles of a control domain and I/O
                                            domain. Typically, this domain is also used as a service domain and provides virtual
                                            disk and network services to guest domains created on the platform.

                                            Oracle RAC nodes
                                            Oracle RAC can be run on any domain, regardless of its roles (although it is not
                                            recommended to run Oracle RAC in the control domain or in a service domain). The
                                            main choice is to run Oracle RAC on either a guest domain or an I/O domain. An
                                            I/O domain will provide optimal I/O performance, because it has direct access to
                                            physical I/O devices, but the number of I/O domains on a platform is limited. On the
                                            other hand, a guest domain is more flexible and supports more dynamic operations
                                            because all its resources and devices are virtualized.

                                            A configuration should not mix Oracle RAC nodes running in I/O domains with
                                            Oracle RAC nodes running in guest domains. Although such a configuration might be
                                            technically possible, it can create a complex setup that is difficult to manage and is
                                            easily error prone. Either all Oracle RAC nodes should be running in I/O domains, or
                                            all should be running in guest domains.

                                            Deployment options
                                            With server virtualization, it is possible to run multiple virtual machines and
                                            operating systems on a single physical system. This capability makes it possible
                                            to host multiple nodes of the same cluster on a single physical system. Two main
                                            variants for deploying Oracle RAC with Logical Domains are considered, as shown in
                                            Figure 1:
Oracle RAC nodes can be placed in Logical
Domains on the same physical server                          Server 1                             Server 1                Server 2
(development variant) to reduce costs,
or can be placed on logical domains on                          Idom1
separate physical server (production                                                               Idom1                   Idom1
variant) for better availability.
                                                                                                             Oracle RAC
                                                                Idom2

                                                             Oracle RAC

                                                          Development                                Production Deployment
                                                          Deployment

                                            Figure 1. Deployment options.
5         Running Oracle RAC on Sun Logical Domains                      Sun Microsystems, Inc.




•	 Development — All Oracle RAC nodes are located on domains on the same
   physical server.
    This variant is convenient for development or evaluation because it reduces
    the amount of hardware required (only one physical server). However, this
    configuration is not intended for running a production environment because the
    physical server is then a single point of failure: if the entire server goes down then
    all nodes will be down and the entire Oracle RAC cluster will unavailable.

•	 Production — Oracle RAC nodes are placed on separate physical servers.
    This variant is recommended for a production environment, because in this
    configuration nodes are on different physical servers and there is no single point
    of failure.

Of course, both variants can be mixed. Just keep in mind that nodes located on the
same physical server can represent a single point of failure.


Software requirements
This section discusses the software requirements for deploying Oracle RAC on Sun
Logical Domains, including Logical Domains Manager software, required operating
system version and patches, firmware, and Oracle RAC software.

Logical Domains requirements
Running Oracle RAC with Logical Domains requires the use of Logical Domains
Manager 1.0.3 or later. The operating system in all domains should be at least
Solaris 10 05/08 (Update 5) with the following patches:
•	 138042-02 or later
•	 137111-01 or later
•	 137042-01 or later
•	 138056-01 or later
•	 127111-05 or later

Servers should have firmware corresponding to LDoms 1.0.3 or later and include the
fix for bug 6725223 (vcpu dr with heavy traffic causes loss of network connectivity for
guest domains). Table 1 shows the minimum firmware version required, depending
on the platform type and LDoms version. These minimum firmware versions all
include the fix bug 6725223.
6            Running Oracle RAC on Sun Logical Domains                          Sun Microsystems, Inc.




Table 1. Minimum firmware versions.


    System                                               LDoms 1.0.3        LDoms 1.1
    UltraSPARC T1 processor-based systems                6.6.7 or later     6.7.0 or later
    UltraSPARC T2 processor-based systems
                               Sun SPARC Enterprise® 7.1.6 or later
                               T5140/T5240 Servers
                               Sun SPARC Enterprise
    UltraSPARC T2 Plus                                   7.1.7.d or later
                               T5440 Server                                 7.2.0 or later
    processor-based
                               Sun Netra™ T5440
    systems                                              7.1.6.e or later
                               Server
                               Sun Blade™ T6340
                                                         N/A
                               Server Module


Each firmware is distributed as a patch depending on the system used. Refer to
“Firmware patches” on page 32 for the list of corresponding firmware patch for each
platform.

Check the Logical Domains Release Notes documentation [4] for more information about
firmware and required patches.


Oracle
Running Oracle RAC on Logical Domains requires the use of Oracle 10g R2 (Oracle
10.2.0.4). Later versions might also be supported. Refer to the Oracle documentation
to check if a particular version is supported and for any additional requirements.
Information can be found on the Oracle MetaLink Web site:
•	 http://www.oracle.com/technology/support/metalink/index.html
•	 http://www.oracle.com/technology/products/database/clustering/certify/
     tech_generic_unix_new.html


Hardware configuration
Any server supporting Logical Domains can be used with Oracle RAC. Refer to the
latest Logical Domains Release Notes documentation [4] for a complete list of
systems supporting Logical Domains. Some additional hardware, such as external
storage arrays or network switches, may be needed depending on the selected
configuration and deployment variant.

As an example, this document studies the deployment of a two-node Oracle
RAC cluster where each Oracle RAC node is located on a LDoms guest domain
on a different physical server (production variant). Figure 2 shows the hardware
configuration and cabling.
7       Running Oracle RAC on Sun Logical Domains                                                 Sun Microsystems, Inc.




                          Server 1 (T5240)                                       Server 2 (T5240)
                 2 UltraSPARC T2 Plus Processors                            2 UltraSPARC T2 Plus Processors
                        (128 CPU Threads)                                          (128 CPU Threads)


                           64 GB Memory                                              64 GB Memory



                               Dual       Onboard NICs            Onboard NICs           Dual
              Onboard          Port          (nxge)                  (nxge)              Port          Onboard
                Disk           HBA                                                       HBA             Disk
             Controller                                                                               Controller
                               A B        0   1     2   3          3   2     1   0       B   A



                                                    1Gb Ethernet switch                                Internal
                                                      Private Network                                    Disks


                                                    1Gb Ethernet switch
                                                      Public Network


                                                  Second External Storage
                                                    Sun StorageTek 6140
                                                        16 x 280 GB

                                                   First External Storage
                                                   Sun StorageTek 6140
                                                         16 x 280 GB



    Figure 2. Hardware configuration.


.   This example uses the following hardware.
    •	 Two Sun SPARC Enterprise T5240 servers, each with 128 CPU threads and 64 GB
       of memory. The Sun SPARC Enterprise T5240 server contains two UltraSPARC T2
       Plus processors. Each UltraSPARC T2 Plus processor is made of 8 CPU cores, and
       each CPU core has 8 CPU threads, providing a total of 2x8x8 = 128 CPU threads per
       system. The LDoms software virtualizes each CPU thread as a virtual CPU, making
       128 virtual CPUs available for creating domains.
    •	 One internal disk is used on each server as the system disk of the control domain.
       The Sun SPARC Enterprise T5240 server can have up to sixteen internal disks.
    •	 Two Sun StorageTek™ 6140 storage arrays, each with sixteen 280 GB Fibre Channel
       (FC) disk drives. Each storage array is connected to both servers, and each server
       should be connected to the same array controller (A or B). The first storage array
       provides one local disk to each guest domain. The second storage array is used
       to provide five shared disks (voting disks, OCR disk and ASM disk) to the Oracle
       RAC nodes. Each volume is owned by one and only one controller; therefore, each
       server using this volume must be connected to the same owning controller (for
       example, Server A to port 1 on Controller A, and Server B to port 2 on Controller
       A).
8        Running Oracle RAC on Sun Logical Domains                      Sun Microsystems, Inc.




•	 Two 4 Gb dual-port FC-AL host bus adapters (HBA), one for each server. These HBAs
   are used to connect the two storage arrays to both servers. Each HBA has two
   ports. On each server, the first port is connected to the first storage array, and the
   second port to the second storage array.
•	 Two 1 Gb Ethernet switches. One switch is used to interconnect the two servers
   and create a private network to be used by Oracle RAC. The second switch is also
   connected to the two servers, but it provides the public network and could be
   connected to a LAN or a WAN.
•	 The on-board network interfaces present on each server are used for network
   communications. The Sun SPARC Enterprise T5240 server has four on-board 1 Gb
   Ethernet network interfaces. The first interface (port 0) is used for the public
   network and connected to the corresponding switch. Two other interfaces (port 2
   and 3) are used to provide redundant access to the private network and they are
   connected to the other switch. One interface (port 1) is not used.

Note that this configuration provides a minimum hardware redundancy. It provides
a dual connection to the private network to meet the minimum requirement of
Oracle RAC. Hardware redundancy can be improved by:
•	 Using additional HBAs to provide redundant access paths to the storage arrays.
•	 Using hardware or software RAID solutions to duplicate on-disk data.
•	 Using the available on-board network interface (port 1) to provide redundant
   access paths to the public network.
•	 Using additional network switches to create a redundant private network and
   have redundant access to the public network.
•	 Using additional network interface adapters to provide PCI bus-level redundancy
   to access private and public networks.


Server configuration
This section includes general configuration guidelines that are recommended when
setting up Oracle RAC on LDoms, and the specific configuration details used for this
example configuration.

Configuration guidelines
The following configuration guidelines are recommended when setting up Oracle
RAC on LDoms:
•	 It is not recommended to run Oracle RAC in the control domain, unless the system
   is configured with a single domain (which is the control domain).
•	 It is not recommended to run Oracle RAC in a service domain.
•	 In an Oracle RAC configuration, Oracle RAC nodes should either all be running
9            Running Oracle RAC on Sun Logical Domains                           Sun Microsystems, Inc.




         in I/O domains, or all be running in guest domains. An Oracle RAC configuration
         should not mix Oracle RAC nodes running in I/O domains with Oracle RAC nodes
         running in guest domains.
    •	 Each domain running Oracle RAC should have a minimum of 8 virtual CPUs (1 CPU
       core) and 4 GB of memory.
    •	 Each service domain providing virtual devices (virtual disk and virtual network)
       to an Oracle RAC guest domain should have a minimum of 16 virtual CPUs (2 CPU
       cores) and 4 GB of memory.
    •	 When running Oracle RAC in guest domains, the private network redundancy
       should be configured using IP multipathing (IPMP) in service domains providing
       virtual network access to the Oracle RAC guest domains.
    •	 Virtual disks shared by Oracle RAC guest domains should be backed by full
       physical SCSI disks or SCSI LUNs. A shared virtual disk should not be backed by a
       file or a volume, and it should not be a single-slice disk.
    •	 If several Oracle RAC guest domains are located on the same physical server then
       each guest domain should access shared disks using a different disk controller or
       HBA, otherwise the system will be unable to correctly handle SCSI reservations.
       Thus, if two Oracle RAC guest domains are located on the same physical server
       and accessing shared disks using the same service domain, then these shared
       disks should be exported from the service domain to each of those guest domains
       using different disk paths.

.
    Configuration details
    In the example presented in this document, each server is configured with two
    domains: the control domain and one guest domain (Figure 3 on page 10). The control
    domain is also the primary domain, and therefore also an I/O domain. Furthermore,
    the control domain is used as a service domain, providing virtual device services
    (virtual disk and virtual network) to the guest domain. For simplicity, the name
    control domain is used to designate all roles of the control, I/O, and service domain.

    Each domain is allocated the following set of resources, as listed in Table 2:

    Table 2. Resources allocated to each domain.

        Domain               CPU                   Memory    Devices
        Control Domain       32 virtual CPUs       16 GB     All PCI buses (internal disks, on-board
                             (4 CPU cores)                   NICs, HBA connected to the two storage
                                                             arrays)
        Guest Domain         48 virtual CPUs       24 GB     Virtual disks and virtual network
                             (6 CPU cores)                   interfaces provided by the control domain
10       Running Oracle RAC on Sun Logical Domains                                           Sun Microsystems, Inc.




    This configuration does not use all resources of the system; there are still 48 virtual
    CPUs (6 CPU cores) and 24 GB of memory available. These remaining resources can
    be used to create additional guest domains or to reconfigure the existing domains if
    more resources are required, for example to handle a more important workload.



              Control/Server/IO Domain                                        Guest Domain

                     Operating System                                         Operating System
                       (Solaris 10)                                             (Solaris 10)

                                                     Hypervisor


            16 GB Memory           32 Virtual CPUs                24 GB Memory           48 Virtual CPUs


                            PCI
                           Buses



           Onboard        Disk                                      Virtual                      Virtual
                                          HBA                        NICs                         Disks
            NICs        Controller




           Network         Internal      External
                             Disks        Disks




    Figure 3. Resource assignment within a physical server.


.
    To act as a service domain, the control domain will have the following virtual device
    services:
    •	 One virtual disk service (primary-vds0) used to export physical disks as virtual
       disks to the guest domain.
    •	 One virtual console concentrator service (primary-vcc0) used to provide access
       to the virtual console of the guest domain. This service will use the port range
       5000-5100 for virtual consoles access.
    •	 One virtual switch service (primary-vsw0) associated with the primary network
       interface (nxge0). This virtual switch will be part of the public network required
       by Oracle RAC. The control domain will be configured to use vsw0 as its primary
       network interface instead of nxge0. This interface is directly connected to the
       virtual switch and will allow the control domain to have a network connection
       with the guest domain and with the external network (through nxge0 which is
       associated with primary-vsw0).
    •	 One virtual switch service (primary-vsw1) associated with no physical network
       interface. This virtual switch will be part of the private network required by Oracle
       RAC.
11       Running Oracle RAC on Sun Logical Domains                     Sun Microsystems, Inc.




    The complete configuration of the public and private networks is described in
    “Network configuration” on page 16.


    Software installation and configuration
    The following tasks are part of server software installation:
    •	 Solaris installation (see below)
    •	 LDoms installation (see below)
    •	 Control domain configuration (see page 12)
    •	 Guest domain configuration (see page 14)

    Additional configuration tasks, including network and storage related tasks, are
    covered in later sections of this document. Oracle installation occurs as a separate
    step, after the network and storage devices are configured.

    Solaris installation
    Initially, Logical Domains are not enabled on Sun CoolThreads technology-based
    servers. The first step is to install the Solaris OS and the appropriate patches. Refer
    to the Solaris OS installation documentation for more information on how to install
    the Solaris OS on servers with SPARC processors. In our example, the operating
    system is installed on the first internal disk of the server.

    New servers come pre-installed with the Solaris OS. For these systems, ensure that
.   the appropriate release of Solaris OS is installed and check that the required patches
    are present. You may also choose to re-install the entire system so that it matches
    your installation requirements.

    After the Solaris OS is installed, the system can be configured and enabled to use
    Logical Domains.

    LDoms installation
    Refer to the Logical Domains Administration Guide [5] for a complete procedure on
    how to install Logical Domains. Basically, the following actions are performed on
    each physical server. This example assumes that the Solaris OS and the required
    patches are already installed on each server:
    1.   Ensure that the system firmware matches the LDoms release that is planned
         for installation. Refer to the Logical Domains Release Notes [4] to find the
         appropriate firmware version and to the Logical Domains Administration Guide
         [5] for instructions to upgrade the system firmware.

    2.   Download the Logical Domains Manager software, version 1.0.3 or later, from
         the Sun Microsystems Web site [6].

    3.   Extract the archive.
12       Running Oracle RAC on Sun Logical Domains                    Sun Microsystems, Inc.




                                     4.   Install the SUNWldm.v package.

                                      # pkgadd -d LDoms_Manager-1_0_3/Product SUNWldm.v


                                     5.   Optionally, install the JASS package if you want to harden the control domain.

                                     6.   Enable the Logical Domain Manager (ldmd) and the Virtual Network Terminal
                                          Server (vntsd) services.

                                      # svcadm enable ldmd
                                      # svcadm enable vntsd


                                     7.   Set up the PATH variable to point to the LDoms binaries.

                                      # PATH=$PATH:/opt/SUNWldm/bin


                                     8.   Optionally, update the PATH variable in the .profile file.


                                     Control domain configuration

Configure a control domain on each   After the LDoms software has been installed, the current system has to be
physical server.                     reconfigured to become the control domain (also known as the primary domain). To
                                     do so, the following actions are performed on each physical server:
                                     1.   Add a virtual disk server (vds).

                                      # ldm add-vds primary-vds0 primary

.
                                     2.   Add a virtual console concentrator (vcc).

                                      # ldm add-vcc port-range=5000-5100 primary-vcc0 primary


                                     3.   Determine the primary network interface of the system. This is usually the first
                                          configured interface, for example nxge0 or e1000g0.

                                     4.   Add a virtual switch associated with the primary network interface. This virtual
                                          switch will be used for the public network.

                                      # ldm add-vsw net-dev=nxge0 primary-vsw0 primary


                                     5.   Add a second virtual switch, not associated with any physical network interface.
                                          This virtual switch will be used for the Oracle RAC private network.

                                      # ldm add-vsw primary-vsw1 primary


                                     6.   Change the primary interface to be the first virtual switch interface. The
                                          following command configures the control domain to plumb and use the
                                          interface vsw0 instead of nxge0.

                                      # mv /etc/hostname.nxge0 /etc/hostname.vsw0
13       Running Oracle RAC on Sun Logical Domains                    Sun Microsystems, Inc.




                                           7.   Configure the control domain (primary) with 32 virtual CPUs (4 CPU cores) and
                                                16 GB of memory:

                                            # ldm set-vcpu 32 primary
                                            # ldm set-memory 16G primary
                                            # ldm set-crypto 4 primary


                                           8.   Save the configuration and reboot the system

                                            # ldm add-spconfig initial
                                            # init 6


                                           After the system reboots, LDoms will be enabled and the system will now be
                                           configured with one domain: the control domain (primary domain). From the control
                                           domain, additional domains can then be created and configured.

                                           Guest domains
This example creates one guest domain on   After the control domain has been configured, one can create the guest domains
each physical server.                      that are used as Oracle RAC nodes. One guest domain is created on each physical
                                           server. The first guest domain is created on the first server with the name ldom1, the
                                           second guest domain is created on the second server with the name ldom2.

                                           Each guest domain (ldom1 and ldom2) is initially created with the following
                                           resources:
                                           •	 48 virtual CPUs
.
                                           •	 16 GB of memory
                                           •	 One virtual network interface (vnet0) connected to the virtual switch primary-
                                              vsw0. This virtual network interface will provide access to the public network.

                                           •	 One virtual network interface (vnet1) connected to the virtual switch primary-
                                              vsw1. This virtual network interface will provide access to the private network.

                                           •	 One virtual disk (which appears as c0d0 in the guest domain) which is a LUN
                                              from the first storage array. The domain ldom1 uses the LUN1 of the storage
                                              array (c3t0d1), and ldom2 uses the LUN2 of the same storage array (c3t0d2).
                                              This virtual disk will be used as the system disk of the guest domain and hosts the
                                              operating system.

                                           To simplify the description of the configuration, guest domains are initially created
                                           with only one disk (c0d0) which is used as the system disk for the operating system.
                                           Additional disks required for the Oracle RAC configuration are added later. The initial
                                           configuration of guest domains is shown in Figure 4 on page 14.
14         Running Oracle RAC on Sun Logical Domains                           Sun Microsystems, Inc.




                                       Server 1
                 Idom1                            Control Domain

                                                                                           Network
                 vnet0                    primary-vsw0              nxge0



                 vnet1                    primary-vsw1



                 c0d0                     primary-vds0              c3t0d1



                                                                                  LUN1
                                                                                rootdisk
                                                                                 Idom1

                                                                             Storage Array 1


                                                                                  LUN2
                                        Server 2                                rootdisk
                                                                                 Idom2
                 Idom1                             Control Domain

                 c0d0                     primary-vds0              c3t0d2



                 vnet1                    primary-vsw1



                 vnet0                    primary-vsw0              nxge0



.


    Figure 4. Guest domain initial configuration.



    Guest domain configuration
    Each guest domain can be created with the following commands:
    1.   Create guest domain ldom1, from the control domain on server 1:

     #   ldm   create ldom1
     #   ldm   set-vcpu 48 ldom1
     #   ldm   set-memory 24G ldom1
     #   ldm   set-crypto 6 ldom1
     #   ldm   add-vnet vnet0 primary-vsw0 ldom1
     #   ldm   add-vnet vnet1 primary-vsw1 ldom1
     #   ldm   add-vdsdev /dev/rdsk/c3t0d1s2 ldom1@primary-vds0
     #   ldm   add-vdisk ldom1 ldom1@primary-vds0 ldom1
15         Running Oracle RAC on Sun Logical Domains                 Sun Microsystems, Inc.




    2.   Create guest domain ldom2, from the control domain on server 2:

     #   ldm   create ldom2
     #   ldm   set-vcpu 48 ldom2
     #   ldm   set-memory 24G ldom2
     #   ldm   set-crypto 6 ldom2
     #   ldm   add-vnet vnet0 primary-vsw0 ldom2
     #   ldm   add-vnet vnet1 primary-vsw1 ldom2
     #   ldm   add-vdsdev /dev/rdsk/c3t0d2s2 ldom2@primary-vds0
     #   ldm   add-vdisk ldom2 ldom2@primary-vds0 ldom2


    After domains have been created, they can be bound and started with the following
    commands:
    1.   To bind and start ldom1, execute the following commands from the control
         domain on server 1:

     # ldm bind ldom1
     # ldm start ldom1


    2.   To bind and start ldom2, execute the following commands from the control
         domain on server 2:

     # ldm bind ldom2
     # ldm start ldom2


    The console of a domain can be accessed when the domain is bound. To do so, the
.   console port associated with the domain is retrieved with the command ldm ls.
    Then the console can be accessed using the telnet command on the appropriate
    console port. For example, if the output from the ldm ls command indicates that
    the console port associated with a domain is 5000, then the following command can
    be used to access the console of that domain from the control domain.
     # telnet localhost 5000


    After each guest domain is started, the appropriate Solaris OS and patches must
    be installed in those domains. The installation can be done over the network, from
    a DVD, or by using a DVD ISO image. Refer to the Logical Domains Administration
    Guide [5] for more information.

    Once the installation of all guest domains is complete, one can continue setting up
    the systems so that they can be used with Oracle RAC. The additional setup includes
    configuration of a public and a private network (see “Network configuration” on
    page 16), and the addition of shared storage (see “Storage configuration” on page 25).
16      Running Oracle RAC on Sun Logical Domains                                   Sun Microsystems, Inc.




    Network configuration
    This section describes the networking configuration used in this example and
    includes network interfaces layout, IP address assignment and host names. It also
    describes the IPMP configuration and routing for the private network.

    Network layout
    The configuration requires two networks:
    •	 A public network which is available for general use and which connects the
       domains. This network can also be interconnected with any other network such as
       a LAN or a WAN.
    •	 A private network used by Oracle RAC (for example for the heartbeat and cache
       fusion). This network interconnects the two Oracle nodes and should not be
       connected to any other network. In particular, the private network should not be
       connected to the public network, and it should not be used by any application
       other than Oracle RAC.

    Public network
    The public network connects the primary network interfaces of the control domains
    (vsw0) and of the guest domains (vnet0), as shown in Figure 5. Each interface is
    connected to the first virtual switch (primary-vsw0) of the control domain. The
    virtual switch is also connected to the external public network using the nxge0
    interface. This public network can also be connected to a LAN or WAN.
.                                                 Server 1
                     Idom1                                     Control Domain

                         vnet0                     primary-vsw0                 nxge0



                                                        vsw0




                                                                           Public Network
                                                                              and VIP


                                                  Server 2
                     Idom2                                     Control Domain

                                                        vsw0



                         vnet0                     primary-vsw0                 nxge0




    Figure 5. Public network configuration.
17      Running Oracle RAC on Sun Logical Domains                        Sun Microsystems, Inc.




    Private network
    The private network connects the secondary network interfaces of the guest domains
    (vnet1), as shown in Figure 6 on page 17. Each interface (vnet1) is connected to the
    second virtual switch (primary-vsw1). Each control domain is also connected to
    this switch by the vsw1 interface. The two servers are physically connected using
    interfaces nxge2 and nxge3 on each system. IPMP is used on top of nxge2 and
    nxge3 to provide redundancy. Each control domain is configured to use IP routing
    between the virtual switch interface (vsw1) and the nxge2 and nxge3 interfaces
    (through IPMP), interconnecting the physical and the virtual private networks.

                                     Server 1
             Idom1                                Control Domain


             vnet1                     primary-vsw1          IPMP Group

                                                                   nxge2

                                          vsw1

                                                                   nxge3



                                                                           Private Network
                                     Server 2                               (Interconnect)
             Idom2                                Control Domain
                                                             IPMP Group

                                                                   nxge3
.
                                          vsw1

                                                                   nxge2

             vnet1                     primary-vsw1




    Figure 6. Private network configuration.
18      Running Oracle RAC on Sun Logical Domains                     Sun Microsystems, Inc.




    Network interface summary
    Figure 7 summarizes the interconnection of the network interfaces of the control
    and guest domains within a single server.

                                     Server
         Guest Domain                           Control Domain


            vnet1                    primary-vsw1            IPMP Group

                                                                 nxge2
                                                                          Private Network
                                         vsw1                              (Interconnect)
                                                                 nxge3
                                         vsw0



                                                                          Public Network
            vnet0                   primary-vsw0                 nxge0
                                                                             and VIP




    Figure 7. Networking within a physical server.




.
19        Running Oracle RAC on Sun Logical Domains                                  Sun Microsystems, Inc.




    Network interfaces and host names
    The configuration requires multiple host names and IP addresses. Table 3
    summarizes the different host names and their association with network interfaces
    and systems:

    Table 3. Host name and IP address assignments.

     Server   Domain      Interface Host name                Description
                                         Control Domain — Server #1
     1        control     vsw0         rac01                 Public network, vsw interface (primary)
     1        control     vsw1         rac01-vsw1            Private network, vsw interface
     1        control     nxge2        rac-node-pri1         Private interconnect, 1st IPMP interface
     1        control     nxge3        rac-node-pri2         Private interconnect, 2nd IPMP interface
     1        control     nxge2:1      rac-node-ext1         Private interconnect, 1st IPMP test address
     1        control     nxge3:1      rac-node-ext2         Private interconnect, 2nd IPMP test address
                                     Guest Domain — Server #1 (ldom1)
     1        ldom1       vnet0        rac-node1             Node 1, public network (primary)
     1        ldom1       vnet1        node1-priv            Node 1, private network
     1        ldom1       none         rac-nodevp1           Node 1, public network, virtual IP
                                         Control Domain — Server #2
     2        control     vsw0         rac02                 Public network, vsw interface (primary)
     2        control     vsw1         rac02-vsw1            Private network, vsw interface
     2        control     nxge2        rac-node-pri3         Private interconnect, 1st IPMP interface
.
     2        control     nxge3        rac-node-pri4         Private interconnect, 2nd IPMP interface
     2        control     nxge2:1      rac-node-ext3         Private interconnect, 1st IPMP test address
     2        control     nxge3:1      rac-node-ext4         Private interconnect, 2nd IPMP test address
                                     Guest Domain — Server #2 (ldom2)
     2        ldom2       vnet0        rac-node2             Node 2, public network (primary)
     2        ldom2       vnet1        node2-priv            Node 2, private network
     2        ldom2       none         rac-nodevp2           Node 2, public network, virtual IP
                                                          Other
     N/A      N/A         N/A          priv-switch           Private switch


    These host names and the associated IP addresses must be defined in the naming
    service used by the domains, for example with DNS, NIS or /etc/hosts. The
    definition must be consistent across all domains.

    In this example configuration, the /etc/hosts file is defined as follows on all
    domains:
20      Running Oracle RAC on Sun Logical Domains                           Sun Microsystems, Inc.




     # cat /etc/hosts
     #
     # Internet host table
     #
     127.0.0.1       localhost                          loghost

     # Public Network

     10.1.9.101             rac01                       # vsw0 – control domain server-1
     10.1.9.102             rac02                       # vsw0 – control domain server-2

     10.1.9.111             rac-node1                   # vnet0 – guest domain, server-1
     10.1.9.112             rac-node2                   # vnet0 – guest domain, server-2

     10.1.9.121             rac-nodevp1                 # vip of rac-node1
     10.1.9.122             rac-nodevp2                 # vip of rac-node2

     # Private Network

     18.1.1.1               priv-switch                 #   private switch
     18.1.1.10              rac-node-pri1               #   nxge2 – guest domain,   server-1
     18.1.1.11              rac-node-pri2               #   nxge3 – guest domain,   server-1
     18.1.1.12              rac-node-ext1               #   IPMP test address for   server-1
     18.1.1.13              rac-node-ext2               #   IPMP test address for   server-1

     18.1.1.14              rac-node-pri3               #   nxge2 – guest domain,   server-2
     18.1.1.15              rac-node-pri4               #   nxge3 – guest domain,   server-2
     18.1.1.16              rac-node-ext3               #   IPMP test address for   server-2
.
     18.1.1.17              rac-node-ext4               #   IPMP test address for   server-2

     192.168.10.10          rac01-vsw1                  # vsw1 – control domain server-1
     192.168.10.11          rac02-vsw1                  # vsw1 – control domain server-2

     192.168.10.111         node1-priv                  # vnet1 – guest domain, server-1
     192.168.10.112         node2-priv                  # vnet1 – guest domain, server-2


    Figure 8 on page 21 shows the assignment of IP addresses for each network interface.
    •	 The nxge0 interface has no IP address because it is associated with the first
       virtual switch (primary-vsw0) and the system is using the interface of that
       virtual switch (vsw0).
    •	 The second virtual switch (primary-vsw1) is not associated with any physical
       network interface, but it uses IP routing between its interface (vsw1) and the
       nxge2 and nxge3 interfaces (through IPMP) to communicate with the external
       private network.
    •	 The vnet1 and vsw1 interfaces belong to network 192.168.10.0/24 and are used
       for the Oracle RAC private network. This network is not available to users.
    •	 The vnet0 and vsw0 interfaces belong to network 10.1.9.0/24 and are used for
21         Running Oracle RAC on Sun Logical Domains                                   Sun Microsystems, Inc.




         public networking and virtual IP (VIP). This network is available to users.
    •	 The nxge2 and nxge3 interfaces belong to network 18.1.1.0/24 and form an
       IPMP group of active/standby interfaces. These interfaces are used for inter-host
       routing on the private network. Routing is per-host based. Routing is required
       because the second virtual switch (primary-vsw1) can not be directly associated
       with a pair of physical interfaces.
    •	 The private physical switch has IP address 18.1.1.1. This address is used as the
       IPMP target address, for checking the status of the private network.


                                           Server 1
                Idom1                                   Control Domain

                vnet1                                                    nxge2
                                         primary-vsw1
            192.168.10.111                                       18.1.1.10 & 18.1.1.12

                                              vsw1         IP routing (-host)     IPMP
                                          192.168.10.10     192.168.10.0/24       Group


                                             vsw0                        nxge3
                                           10.1.9.101            18.1.1.11 & 18.1.1.13

                vnet0
                                         primary-vsw0                    nxge0
              10.1.9.111




                                                                   Public Network         Private Network
.                                                                    10.1.9.0/24            18.1.1.0/24



                                           Server 2
                Idom2                                   Control Domain

                vnet0                                                     nxge0
                                         primary-vsw0
              10.1.9.112

                                             vsw0                        nxge3
                                           10.1.9.102            18.1.1.15 & 18.1.1.17


                                              vsw1         IP routing (-host)     IPMP
                                          192.168.10.11     192.168.10.0/24       Group


                vnet1                                                    nxge2
                                         primary-vsw1
            192.168.10.112                                       18.1.1.14 & 18.1.1.16




    Figure 8. IP address assignment.
22       Running Oracle RAC on Sun Logical Domains                   Sun Microsystems, Inc.




    Private network configuration
    Configuration of the private network involves specifying the network interface name,
    configuring IPMP in active/standby node, and configuring IP routing.

    Network interface
    On the control domain of both servers, configure the virtual network instance (vsw1)
    of the second virtual switch (primary-vsw1):
    1.   On the control domain of server 1:

     # cat /etc/hostname.vsw1
     rac01-vsw1


    2.   On the control domain of server 1:

     # cat /etc/hostname.vsw1
     rac02-vsw1


    IPMP
    In addition, the following setup is required to configure IPMP in active/standby
    mode for interfaces nxge2 and nxge3:
    1.   On the control domain of server 1:

     # cat /etc/hostname.nxge2
     rac-node-pri1 
     netmask 255.255.255.0 broadcast + 
.    group priv2 up 
     addif rac-node-ext1 
     deprecated -failover 
     netmask 255.255.255.0 
     broadcast + up

     # cat /etc/hostname.nxge3
     rac-node-ext2 
     netmask 255.255.255.0 broadcast + 
     deprecated group priv2 
     -failover standby up
23       Running Oracle RAC on Sun Logical Domains                    Sun Microsystems, Inc.




    2.   On the control domain of server 2:

     # cat /etc/hostname.nxge2
     rac-node-pri3 
     netmask 255.255.255.0 broadcast + 
     group priv2 up 
     addif rac-node-ext3 
     deprecated -failover 
     netmask 255.255.255.0 broadcast + up

     # cat /etc/hostname.nxge3
     rac-node-ext4 
     netmask 255.255.255.0 broadcast + 
     deprecated group priv2 
     -failover standby up


    IP routing
    IP routing must be configured for the private network. Specifically, the physical
    private network 18.1.1.0/24 between the servers must be connected with the virtual
    private network 192.168.10.0/24 of the domains (see Figure 8 on page 21).
    1.   IP Routing can be activated by enabling IPv4 forwarding on both control
         domains:

     # svcadm enable svc:/network/ipv4-forwarding:default


    2.   Next, static IP routes must be defined to create the appropriate routing. This
.        can be accomplished by creating and executing the following script
         (/etc/rc3.d/S76myroutes) on the control and guest domains:
24    Running Oracle RAC on Sun Logical Domains               Sun Microsystems, Inc.




     # cat /etc/rc2.d/S76myroutes
     #!/bin/bash

     case `uname -n` in
     rac-node1)
                route add           18.1.1.0/24 rac01-vsw1
                route add           -host rac02-vsw1 rac01-vsw1
                route add           -host node2-priv rac01-vsw1
                ;;
     rac-node2)
                route add           18.1.1.0/24 rac02-vsw1
                route add           -host rac01-vsw1 rac02-vsw1
                route add           -host node1-priv rac02-vsw1
                ;;
     rac01)
                route add           -host priv-switch priv-switch -static
                route add           -host rac02-vsw1 rac-node-pri3
                route add           -host node2-priv rac-node-pri3
            ;;
     rac02)
                route add           -host priv-switch priv-switch -static
                route add           -host node1-priv rac-node-pri1
                route add           -host rac01-vsw1 rac-node-pri1
            ;;
     esac




.
25       Running Oracle RAC on Sun Logical Domains                       Sun Microsystems, Inc.




                                           Storage configuration
                                           Guest domains were initially created with only one virtual disk (c0d0) used as the
                                           system disk for the operating system. In order to run Oracle RAC, additional disks
                                           must be assigned to both guest domains. These additional disks need to be visible
                                           from both guest domains.

                                           Shared and virtual disks
                                           Figure 9 shows the virtualization of a shared LUN, exported from external storage,
                                           as a virtual disk to the guest domain. The storage array is connected to the control
                                           domain, which exports the LUN as a virtual disk to the guest domain. When adding
                                           virtual disk drives to the guest domains it is recommended that LUNs are exported
                                           in the same order on both systems so that virtual disks will have the same device
                                           names on both nodes.

                                                      Server 1                                                   Server 2
                                                        Idom1                                                      Idom2

                                                         c0d1                                                       c0d1

LUN0 is multihosted and visible with the
same name (c2t1d0) on both control                 Control Domain                                              Control Domain
domains.
                                                    primary-vds0                                                primary-vds0
                                                                                        Storage Array

.                                                       c2t1d0                          Storage Array              c2t1d0
                                                                                            LUNO




                                           Figure 9. Shared storage is accessible to multiple domains using the same device
                                           name.



                                           Adding shared disks to guest domains
                                           In this configuration, five LUNs from the second storage array are used as shared
                                           disks. Because the hardware configuration is the same on both servers, the LUNs
                                           from the second storage array appear with the same device names (c2t1d0 to
                                           c2t1d4) on both control domains.

                                           Note: LUNs may (and often will) appear with different names on different servers. LUN names
                                           in control domains are not required to be identical. LUN names within guest domains must
                                           be identical. This can easily be achieved by importing LUNs in the same order across all
                                           domains.
26      Running Oracle RAC on Sun Logical Domains                  Sun Microsystems, Inc.




    To export a LUN as virtual disk, execute the following commands. In the following
    example, c2t1d0s2 is the device name for the OCR LUN.
    1.   To add the LUN to ldom1, execute the following commands from the control
         domain of server 1:

     # ldm add-vdsdev /dev/rdsk/c2t1d0s2 ocr1@primary-vds0
     # ldm add-vdisk ocr1 ocr1@primary-vds0 ldom1


    2.   To add the LUN to ldom2, execute the following commands from the control
         domain of server 2:

     # ldm add-vdsdev /dev/rdsk/c2t1d0s2 ocr2@primary-vds0
     # ldm add-vdisk ocr2 ocr2@primary-vds0 ldom2


    If LDoms 1.1 is used, then the new disk will be immediately added to the guest
    domain; otherwise, the guest domain must be rebooted for the new disk to become
    visible. Once the disk is visible, use the format(1m) command from any guest
    domain to partition the new disk and create the required partition for OCR. Check
    from all guest domains that the correct partitioning is visible.

    The same steps must be repeated for each shared disk (voting disks and ASM disk).
    Figure 10 shows the final configuration after all shared disks have been added to
    guest domains.


.
27      Running Oracle RAC on Sun Logical Domains                                         Sun Microsystems, Inc.




                     Server 1                                                      Server 2
                          Idom1                                                     Idom2

             c0d[1-5]              c0d0                                    c0d0             c0d[1-5]


                  Control Domain                                                Control Domain

                    primary-vds0                                                 primary-vds0


             c2t1d[0-4]           c3t0d1                                  c3t0d2            c2t1d[0-4]




                                                  Storage Array 1

                                              LUN1                     LUN2
                                            rootdisk                 rootdisk
                                             Idom1                    Idom2
                                                   Non-Shared LUNs

                                                 Storage Array 2


             LUN0                  LUN1                   LUN2             LUN3                  LUN4
              OCR                 Voting1                Voting2          Voting3                ASM
                                                       Shared LUNs


.   Figure 10. Storage cabling.




    Oracle installation
    The installation of the Oracle RAC and Oracle database software is similar to a
    standard Oracle installation. Use network 10.1.9.0/24 for public and VIP networks,
    and 192.168.10.0/24 for the private network. Start with the installation of Oracle
    Clusterware and then apply the latest patch set (#3 at the time this document was
    written). Continue with the installation of Oracle database, and apply the same
    patch set this time to the Oracle database.

    If the system will use CPU dynamic reconfiguration then install Oracle patch 7172531
    to avoid the error “ORA-7445 SIGSEGV WHEN CPU COUNT DYNAMICALLY CHANGED”.
28       Running Oracle RAC on Sun Logical Domains                    Sun Microsystems, Inc.




    Additional information
    This section contains additional information relevant to Oracle RAC deployments on
    Sun LDoms, including:
    •	 NTP (see below)
    •	 CPU dynamic reconfiguration (see below)
    •	 Performance considerations (see page 29)
    •	 Known issues (see page 29)

    NTP
    The system clock of the different domains should be synchronized. This can be done
    by using the network time synchronization protocol (NTP) across all domains.
    In this example the control domain on the first server (rac01) is used as a time
    source, and configured as an NTP server:
     # grep -v ^# /etc/inet/ntp.conf
     server 127.127.1.0 prefer
     broadcast 224.0.1.1 ttl 4
     enable auth monitor
     driftfile /var/ntp/ntp.drift
     statsdir /var/ntp/ntpstats/
     filegen peerstats file peerstats type day enable
     filegen loopstats file loopstats type day enable
     filegen clockstats file clockstats type day enable
     keys /etc/inet/ntp.keys
.    trustedkey 0
     requestkey 0
     controlkey 0
     # touch /var/ntp/ntp.drift
     # svcadm enable ntp

    Other domains (rac02, rac-node1 and rac-node2) are configured as NTP clients:
     # grep -v ^# /etc/inet/ntp.conf
     multicastclient 224.0.1.1
     # svcadm enable ntp



    CPU dynamic reconfiguration
    Logical Domains supports CPU dynamic reconfiguration. CPUs can be dynamically
    added or removed from any active domain, using the ldm add-vcpu or ldm rm-
    vcpu commands from the control domain. These commands can be used with a
    domain running Oracle RAC. When reducing the number of CPUs of a domain, ensure
    that enough CPUs are still available to efficiently handle the workload of the domain
    (an Oracle RAC guest domain should always have at least 8 virtual CPUs).
29       Running Oracle RAC on Sun Logical Domains                           Sun Microsystems, Inc.




    When using CPU dynamic reconfiguration, ensure that the Oracle patch 7172531
    has been installed to avoid the error “ORA-7445 SIGSEGV WHEN CPU COUNT
    DYNAMICALLY CHANGED”.

    Performance considerations
    With the configuration shown in this example, control domains are responsible for
    I/O and network flow processing. Tests have shown that the CPU’s system load on
    control domains is around 15% for a storage I/O load of 300 MB/sec on each control
    domain and a network load around 25 MB/sec.

    Try to avoid any swap activity on the guest domains because any swap activity on
    the guest domains will generate additional I/O requests which must be handled by
    the control domains.

    Do not share CPU cores between domains, especially between two domains running
    the Oracle database. If CPU threads from the same CPU core are assigned to
    different domains, then this can reduce the efficiency of these CPU threads.

    Known issues
    The following issues are known to exist at the time this document was published.

    Queries with a high degree of parallelism (DOP)
    In some cases, when doing queries having a high degree of parallelism (DOP), you
    may observe the reboot of some nodes because of missed Oracle Cluster heartbeats.
.   The reason is that high DOP queries can generate a very high traffic of Oracle Cache
    (80-100%) requests over the private network which can prevent the distribution of
    the Oracle Cluster heartbeat if the private network is overloaded.

    How to monitor:
    1.   Monitor network interfaces load (use dim_STAT utility).

    Note: The dim_STAT utility is installed separately, and is not a part of the Solaris OS.


    Workaround:
    1.   Set the DEGREE property of involved tables to 48 or less.

    2.   Change the Clusterware variable misscount. The default value of misscount
         is 30 seconds. This defines the maximum amount of time Clusterware is
         waiting for all nodes to send their heartbeats. If a node is not able to deliver
         its heartbeat packets within this time then it is evicted. Refer to Oracle note
         284752.1 on Oracle Metalink for setting this variable and carefully review the
         impact and recommendation from Oracle before changing this setting.
30       Running Oracle RAC on Sun Logical Domains                    Sun Microsystems, Inc.




    Solution:
    1.   Install LDoms patch 139562-02 on all domains. This patch improves virtual
         network device performance.

    2.   On UltraSPARC-T2 based systems, with LDoms 1.1 and Solaris 10 10/08 (Update
         6), you can use network hybrid I/O if you have compatible network interfaces
         (this requires XAUI network adapter).

    Jumbo frames are not supported.
    The LDoms virtual switch and virtual network interfaces does not currently support
    jumbo frames. Support for jumbo frame is planned for the next LDoms release.

    IP Routing is required when using IPMP with virtual switches
    Although using IP routing is not the preferred setup for the Oracle RAC private
    network configuration, it has to be used in order to associate a virtual switch with
    network interfaces managed by IPMP and provide private network redundancy.

    Network performance might not be optimal with nxge interfaces
    Under certain conditions, the packet serializer of nxge network interfaces might
    perform poorly and impact network performances. This might create problems with
    Oracle Cache Fusion on the private network. A workaround to improve performance
    is to adjust a parameter of the nxge driver. This parameter will change the behavior
    of the serializer for all nxge interfaces. To enable the workaround, the following
    command has to be executed on the domain with the nxge interfaces (the control
.
    domain in our example):
     # echo ’nxge_maxhrs/W 0’ | mdb -kw


    Note that this workaround will not be persistent across reboots of the domain. The
    command to enable the workaround can be included in a startup script (rc script) so
    that it is automatically executed if the system reboots. Another workaround is to use
    e1000g network interfaces instead of nxge interfaces for the private network.

    A final solution to this problem is expected to be delivered in a future patch and in a
    next update of Solaris OS. This problem is referenced as Sun bug 6756568 (1GbE nxge
    performance can be improved by up to 60% on Thunder/LDOMs).

    Clock skew messages

    Every few days, Oracle log files might report messages like these ones:
     AlarmHandler: clock skew detected, reseting interval timer
     skew: ctime 1182547970260687, ltime 1182546970265954,
     cclock 1227523221351199000, lclock 1227523214087618000,
     cdiff 999994733, tdiff 7263581000, diff 6263586267
31      Running Oracle RAC on Sun Logical Domains                    Sun Microsystems, Inc.




    This first message is just saying that the oprocd process has detected a clock
    skew, and that it has reset its interval timer. Then it presents the data as to how it
    determined the clock skew, and how big the skew was. These messages are harmless
    unless they occur very frequently and the skew increases, as a large skew could
    cause the oprocd process to eventually reboot the node.

    Workload used during the Oracle certification process
    Both online transaction processing (OLTP) and data warehousing (DW) types of
    databases were used simultaneously for the Oracle RAC certification. The OLTP
    database was made of SwingBench Order Entry 80GB database. The DW database
    was made of TPC-H database 100GB. The Oracle RAC cluster comprised four nodes
    spread on two physical servers (this is a mix of the development and production
    variants (see “Deployment options” on page 4). Each certification test was conducted
    with a system load close to 100%.


    Summary
    Oracle RAC can be installed on servers configured with Sun Logical Domains (LDoms),
    a virtualization technology that allows the creation of multiple virtual systems on a
    single physical system. Multiple Oracle RAC nodes can be configured on LDoms on
    the same physical server, for a lower-cost development option. Alternatively, Oracle
    RAC nodes can be placed on LDoms on separate physical servers to provide better
    availability for production deployments.
.
    This paper presents an example configuration of the production variant, with
    Oracle RAC nodes placed in LDoms on two separate physical servers. Step-by-step
    instructions describe the complete configuration process, including LDoms creation
    and configuration, networking setup, and storage configuration. Configuration
    guidelines and software requirements are also included, to help administrators plan
    for their deployments of Oracle RAC on LDoms.
32        Running Oracle RAC on Sun Logical Domains                              Sun Microsystems, Inc.




    Appendices
    Firmware patches

    Table 4. Required firmware patches.

     System                                               LDoms 1.0.3          LDoms 1.1
                                  UltraSPARC T1 processor-based systems
     Sun Fire™ and SPARC Enterprise T2000 Server          136927-05 or later   139434-01 or later
     Sun Fire and SPARC Enterprise T1000 Server           136928-05 or later   139435-01 or later
     Sun Netra T2000 Server                               136929-05 or later   139436-01 or later
     Sun Netra CP3060 ATCA Blade Server                   136930-05 or later   139437-01 or later
     Sun Blade™ T6300 Server Module                       136931-05 or later   139438-01 or later
                                  UltraSPARC T2 processor-based systems
     Sun SPARC Enterprise T5120 & T5220 Server            136932-04 or later   139439-01 or later
     Sun Blade T6320 Server Module                        136933-06 or later   139440-01 or later
     Sun Netra T5220 Server                               136934-05 or later   139442-01 or later
     Sun Netra CP3260 Server                              136935-02 or later   N/A
                                UltraSPARC T2 Plus processor-based systems
     Sun SPARC Enterprise T5140 & T5240 Server            136936-07 or later   139444-01 or later
     Sun SPARC Enterprise T5440 Server                    136937-03 or later   139446-01 or later
     Sun Netra T5440 Server                               136938-02 or later   139445-01 or later
.    Sun Blade T6340 Server Module                        N/A                  139448-01 or later
33      Running Oracle RAC on Sun Logical Domains                        Sun Microsystems, Inc.




              Logical Domains configuration example
              This section shows the Logical Domains configuration described as an example in
              this document.

              Configuration of the first control domain (rac01)

    NAME              STATE        FLAGS        CONS          VCPU   MEMORY   UTIL   UPTIME
    primary           active       -n-cv        SP            32     16000M    11%   10d 15h 59m

    SOFTSTATE
    Solaris running

    VCPU
        VID    PID     UTIL STRAND
        0      0        31%   100%
        1      1        12%   100%
        2      2       4.3%   100%
        3      3       2.8%   100%
        4      4        22%   100%
        5      5       3.7%   100%
        6      6       3.0%   100%
        7      7       5.2%   100%
        8      8        29%   100%
        9      9       9.9%   100%
        10     10      3.5%   100%
        11     11      3.1%   100%
        12     12       21%   100%
        13     13      4.0%   100%
.       14     14      0.8%   100%
        15     15      4.3%   100%
        16     16       27%   100%
        17     17      6.7%   100%
        18     18      3.4%   100%
        19     19      9.1%   100%
        20     20       28%   100%
        21     21      4.1%   100%
        22     22      3.2%   100%
        23     23      4.8%   100%
        24     24       28%   100%
        25     25      7.3%   100%
        26     26      4.7%   100%
        27     27      5.8%   100%
        28     28       19%   100%
        29     29      3.6%   100%
        30     30      4.0%   100%
        31     31      2.7%   100%
34       Running Oracle RAC on Sun Logical Domains                     Sun Microsystems, Inc.




    MAU
          ID     CPUSET
          0      (0, 1, 2, 3, 4, 5, 6, 7)
          1      (8, 9, 10, 11, 12, 13, 14, 15)
          2      (16, 17, 18, 19, 20, 21, 22, 23)
          3      (24, 25, 26, 27, 28, 29, 30, 31)

    MEMORY
        RA                    PA                          SIZE
        0xe000000             0xe000000                   16000M

    VARIABLES
        boot-device=/pci@400/pci@0/pci@8/scsi@0/disk@0,0:a disk net
        keyboard-layout=US-English
        security-mode=none
        security-password=

    IO
          DEVICE              PSEUDONYM                   OPTIONS
          pci@400             pci_0
          pci@500             pci_1

    VCC
          NAME                PORT-RANGE
          primary-vcc0        5000-5100

    VSW
.         NAME                MAC               NET-DEV              DEVICE     MODE
          primary-vsw0        00:14:4f:46:e9:5c nxge0                switch@0
          primary-vsw1        00:14:4f:fa:61:af                      switch@1

    VDS
          NAME                VOLUME                   OPTIONS           DEVICE
          primary-vds0        ldom1                                      /dev/rdsk/c3t0d1s2
                              ocr1                                       /dev/rdsk/c2t1d0s2
                              voting11                                   /dev/rdsk/c2t1d1s2
                              voting21                                   /dev/rdsk/c2t1d2s2
                              voting31                                   /dev/rdsk/c2t1d3s2
                              ASM1                                       /dev/rdsk/c2t1d4s2

    VCONS
        NAME                  SERVICE                                PORT
        SP
35      Running Oracle RAC on Sun Logical Domains                        Sun Microsystems, Inc.




              Configuration of the first guest domain (ldom1)

    NAME              STATE        FLAGS        CONS          VCPU   MEMORY   UTIL   UPTIME
    ldom1             active       -n---        5000          48     24G       15%   3h 58m

    SOFTSTATE
    Solaris running
    VCPU
        VID    PID     UTIL STRAND
        0      32      9.7%   100%
        1      33      1.4%   100%
        2      34      0.8%   100%
        3      35      0.5%   100%
        4      36      2.4%   100%
        5      37      0.6%   100%
        6      38      0.4%   100%
        7      39      2.4%   100%
        8      40      7.7%       100%
        9      41      2.3%       100%
        10     42      0.6%       100%
        11     43      1.0%       100%
        12     44      3.0%       100%
        13     45      0.5%       100%
        14     46      0.0%       100%
        15     47      0.9%       100%
        16     48      6.0%       100%
        17     49      0.9%       100%
        18     50      0.6%       100%
.       19     51      3.8%       100%
        20     52      5.5%       100%
        21     53      0.8%       100%
        22     54      0.6%       100%
        23     55      1.0%       100%
        24     56      8.1%       100%
        25     57      0.7%       100%
        26     58      1.1%       100%
        27     59      1.3%       100%
        28     60      2.9%       100%
        29     61      0.7%       100%
        30     62      1.4%       100%
        31     63      0.7%       100%
        32     64      0.0%       100%
        33     65      0.0%       100%
        34     66      0.0%       100%
        35     67      0.0%       100%
        36     68      0.0%       100%
        37     69      0.0%       100%
        38     70      0.0%       100%
        39     71      0.0%       100%
36     Running Oracle RAC on Sun Logical Domains                        Sun Microsystems, Inc.




          40     72     0.0%       100%
          41     73     0.0%       100%
          42     74     0.0%       100%
          43     75     0.0%       100%
          44     76     0.0%       100%
          45     77     0.0%       100%
          46     78     0.0%       100%
          47     79     0.0%       100%

    MAU
          ID     CPUSET
          4      (32, 33,   34,   35,   36,   37,    38,   39)
          5      (40, 41,   42,   43,   44,   45,    46,   47)
          6      (48, 49,   50,   51,   52,   53,    54,   55)
          7      (56, 57,   58,   59,   60,   61,    62,   63)
          8      (64, 65,   66,   67,   68,   69,    70,   71)
          9      (72, 73,   74,   75,   76,   77,    78,   79)

    MEMORY
        RA                   PA                         SIZE
        0x6000000            0x3f6000000                24G

    VARIABLES
        boot-device=/virtual-devices@100/channel-devices@200/disk@0:a vnet0
        keyboard-layout=US-English

    NETWORK
        NAME             SERVICE                                   DEVICE      MAC
.       vnet0            primary-vsw0@primary                      network@0   00:14:4f:f8:9c:50
        vnet1            primary-vsw1@primary                      network@1   00:14:4f:f8:3b:d2

    DISK
          NAME               VOLUME                                    TOUT DEVICE   SERVER
          ldom1              ldom1@primary-vds0                             disk@0   primary
          ocr1               ocr1@primary-vds0                              disk@1   primary
          voting11           voting11@primary-vds0                          disk@2   primary
          voting21           voting21@primary-vds0                          disk@3   primary
          voting31           voting31@primary-vds0                          disk@4   primary
          ASM1               ASM1@primary-vds0                              disk@5   primary

    VCONS
        NAME                 SERVICE                                   PORT
        ldom1                primary-vcc0@primary                      5000
37      Running Oracle RAC on Sun Logical Domains                        Sun Microsystems, Inc.




                Configuration of the second control domain (rac02)

    NAME               STATE         FLAGS        CONS          VCPU   MEMORY   UTIL   UPTIME
    primary            active        -n-cv        SP            32     16000M    14%   1d 18h 43m

    SOFTSTATE
    Solaris running

    VCPU
          VID   PID     UTIL STRAND
          0     0       0.0%   100%
          1     1       0.0%   100%
          2     2       0.0%   100%
          3     3       0.0%   100%
          4     4       0.0%   100%
          5     5       0.0%   100%
          6     6       0.0%   100%
          7     7       0.0%   100%
          8     8       0.0%   100%
          9     9       0.0%   100%
          10    10      0.0%   100%
          11    11      0.0%   100%
          12    12      0.0%   100%
          13    13      0.0%   100%
          14    14      0.0%   100%
          15    15      0.0%   100%
          16    16      0.0%   100%
          17    17      0.0%   100%
.         18    18      0.0%   100%
          19    19      0.0%   100%
          20    20      0.0%   100%
          21    21      0.0%   100%
          22    22      0.0%   100%
          23    23      0.0%   100%
          24    24      0.0%   100%
          25    25      0.0%   100%
          26    26      0.0%   100%
          27    27      0.0%   100%
          28    28      0.0%   100%
          29    29      0.0%   100%
          30    30      0.0%   100%
          31    31      0.0%   100%

    MAU
          ID    CPUSET
          0     (0, 1, 2, 3, 4, 5, 6, 7)
          1     (8, 9, 10, 11, 12, 13, 14, 15)
          2     (16, 17, 18, 19, 20, 21, 22, 23)
          3     (24, 25, 26, 27, 28, 29, 30, 31)
38    Running Oracle RAC on Sun Logical Domains                        Sun Microsystems, Inc.




    MEMORY
        RA                    PA                          SIZE
        0xe000000             0xe000000                   16000M



    VARIABLES
          boot-device=/pci@400/pci@0/pci@8/scsi@0/disk@0,0:a disk net
          keyboard-layout=US-English
          security-mode=none
          security-password=



    IO
          DEVICE              PSEUDONYM                   OPTIONS
          pci@400             pci_0
          pci@500             pci_1



    VCC
          NAME                PORT-RANGE
          primary-vcc0        5000-5100



    VSW
          NAME                MAC                           NET-DEV   DEVICE       MODE
          primary-vsw0        00:14:4f:46:e8:8a nxge0                 switch@0
.         primary-vsw1        00:14:4f:fa:d3:55                       switch@1



    VDS
          NAME                VOLUME                   OPTIONS            DEVICE
          primary-vds0        ldom2                                       /dev/rdsk/c3t0d2s2
                              ocr2                                        /dev/rdsk/c2t1d0s2
                              voting12                                    /dev/rdsk/c2t1d1s2
                              voting22                                    /dev/rdsk/c2t1d2s2
                              voting32                                    /dev/rdsk/c2t1d3s2
                              ASM2                                        /dev/rdsk/c2t1d4s2



    VCONS
          NAME                SERVICE                                 PORT
          SP
39      Running Oracle RAC on Sun Logical Domains                        Sun Microsystems, Inc.




                Configuration of the second guest domain (ldom2)

    NAME               STATE         FLAGS        CONS          VCPU   MEMORY   UTIL   UPTIME
    ldom2              active        -n---        5000          48     24G       15%   3h 50m


    SOFTSTATE
    Solaris running


    VCPU
        VID     PID     UTIL STRAND
        0       32        41%       100%
        1       33        14%       100%
        2       34      6.8%        100%
        3       35        16%       100%
        4       36        35%       100%
        5       37      7.1%        100%
        6       38      6.8%        100%
        7       39      8.2%        100%
        8       40        40%       100%
        9       41        13%       100%
        10      42      6.8%        100%
        11      43      7.0%        100%
        12      44        27%       100%
        13      45      4.8%        100%
        14      46      6.2%        100%
.       15      47      3.8%        100%
        16      48        39%       100%
        17      49      10.0%        100%
        18      50      1.5%        100%
        19      51      1.1%        100%
        20      52        28%       100%
        21      53      2.3%        100%
        22      54      2.9%        100%
        23      55      1.0%        100%
        24      56        39%       100%
        25      57      9.5%        100%
        26      58      1.9%        100%
        27      59      1.0%        100%
        28      60        23%       100%
        29      61      7.4%        100%
        30      62      5.8%        100%
        31      63      7.8%        100%
        32      64      0.0%        100%
        33      65      0.0%        100%
        34      66      0.0%        100%
        35      67      0.0%        100%
40       Running Oracle RAC on Sun Logical Domains                      Sun Microsystems, Inc.




          36      68       0.0%        100%
          37      69       0.0%        100%
          38      70       0.0%        100%
          39      71       0.0%        100%
          40      72       0.0%        100%
          41      73       0.0%        100%
          42      74       0.0%        100%
          43      75       0.0%        100%
          44      76       0.0%        100%
          45      77       0.0%        100%
          46      78       0.0%        100%
          47      79       0.0%        100%


    MAU
          ID      CPUSET
          4       (32, 33, 34, 35, 36, 37, 38, 39)
          5       (40, 41, 42, 43, 44, 45, 46, 47)
          6       (48, 49, 50, 51, 52, 53, 54, 55)
          7       (56, 57, 58, 59, 60, 61, 62, 63)
          8       (64, 65, 66, 67, 68, 69, 70, 71)
          9       (72, 73, 74, 75, 76, 77, 78, 79)


    MEMORY
          RA                    PA                          SIZE
          0x6000000             0x3f6000000                 24G
.
    VARIABLES
          keyboard-layout=US-English


    NETWORK
          NAME                  SERVICE                                DEVICE       MAC
          vnet0                 primary-vsw0@primary                   network@0    00:14:4f:f9:02:a7
          vnet1                 primary-vsw1@primary                   network@1    00:14:4f:f9:ef:3c


    DISK
          NAME                  VOLUME                                 TOUT DEVICE     SERVER
          ldom2                 ldom2@primary-vds0                            disk@0   primary
          ocr2                  ocr2@primary-vds0                             disk@1   primary
          voting12              voting12@primary-vds0                         disk@2   primary
          voting22              voting22@primary-vds0                         disk@3   primary
          voting32              voting32@primary-vds0                         disk@4   primary
          ASM2                  ASM2@primary-vds0                             disk@5   primary


    VCONS
          NAME                  SERVICE                                PORT
          ldom2                 primary-vcc0@primary                   5000
Oracle rac-in-ldoms-sunblueprint
Oracle rac-in-ldoms-sunblueprint
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Oracle rac-in-ldoms-sunblueprint

  • 1. RUNNING ORACLE REAL APPLICATION CLUSTERS (RAC) ON SUN™ LOGICAL DOMAINS Alexandre Chartre, Sun Microsystems, Inc. Daniel Dibbets, Oracle Corporation Roman Ivanov, Sun Microsystems, Inc. Sun BluePrints™ Online Part No 820-7931-10 Revision 1.0, 05/28/09
  • 2. Sun Microsystems, Inc. Table of Contents Running Oracle Real Application Clusters (RAC) on Sun™ Logical Domains ............. 1 Introduction ....................................................................................................... 1 Logical domains overview................................................................................ 2 Oracle RAC nodes ............................................................................................ 4 Deployment options ........................................................................................ 4 Software requirements........................................................................................ 5 Logical Domains requirements ......................................................................... 5 Hardware configuration ...................................................................................... 6 Server configuration ........................................................................................... 8 Configuration guidelines ................................................................................. 8 Configuration details....................................................................................... 9 Software installation and configuration ............................................................. 11 Solaris installation ........................................................................................ 11 LDoms installation ........................................................................................ 11 Control domain configuration ........................................................................ 12 Guest domains .............................................................................................. 13 Guest domain configuration .......................................................................... 14 Network configuration ...................................................................................... 16 Network layout ............................................................................................. 16 Network interfaces and host names ............................................................... 19 Private network configuration ....................................................................... 22 Storage configuration ....................................................................................... 25 Shared and virtual disks ............................................................................... 25 Adding shared disks to guest domains ............................................................ 25 Oracle installation ............................................................................................ 27 Additional information ...................................................................................... 28 NTP .............................................................................................................. 28 CPU dynamic reconfiguration ........................................................................ 28 Performance considerations .......................................................................... 29 Known issues ................................................................................................ 29 Workload used during the Oracle certification process .................................... 31 Summary ......................................................................................................... 31 Appendices ...................................................................................................... 32 Firmware patches ......................................................................................... 32 Logical Domains configuration example ......................................................... 33 About the authors ............................................................................................ 41 Acknowledgments ............................................................................................ 41 References ....................................................................................................... 41 Ordering Sun documents ................................................................................... 42 Accessing Sun documentation online ................................................................. 42
  • 3. 1 Running Oracle RAC on Sun Logical Domains Sun Microsystems, Inc. Running Oracle Real Application Clusters (RAC) on Sun™ Logical Domains This article discusses running Oracle Real Application Clusters (RAC) on servers configured with Sun™ Logical Domains (LDoms). Sun LDoms virtualization technology allows the creation of multiple virtual systems on a single physical system, and enables fine-grained assignment of CPU and memory resources to an Oracle RAC workload. When deployed on Sun’s CoolThreads™ technology-based servers, with up to 256 threads per system, this solution provides a powerful platform for both development and production environments. In development environments, multiple Oracle RAC nodes can be deployed on the same physical server to reduce hardware costs, while a production environment can place each Oracle node on a separate physical server for increased availability. This paper addresses the following topics: • “Introduction” on page 1 provides an overview of Oracle RAC and LDoms, and discusses the various deployment options for this solution. • “Software requirements” on page 5 lists the software and firmware requirements, and “Hardware configuration” on page 6 describes the hardware used for an example configuration. • “Software installation and configuration” on page 11, “Network configuration” on page 16, and “Storage configuration” on page 25 describe the steps necessary to install and configure an example configuration. • “Additional information” on page 28 provides supplemental information, including performance considerations and known issues. Introduction Oracle Real Application Clusters (RAC)[1] is an option to the award-winning Oracle Database Enterprise Edition. Oracle RAC is a cluster database with a shared cache architecture that overcomes the limitations of traditional shared-nothing and shared-disk approaches to provide highly scalable and available database solutions for all your business applications. Oracle RAC is a key component of the Oracle enterprise grid architecture. Oracle RAC utilizes Oracle Clusterware[2] for the inter-node communication required in clustered database environments. Oracle Clusterware is the technology that transforms a server farm into a cluster. A cluster, in general, is a group of independent servers that cooperate as a single system. Oracle Clusterware is the intelligence in this system that ensures the required cooperation, and is a key component of the Oracle enterprise grid architecture as well.
  • 4. 2 Running Oracle RAC on Sun Logical Domains Sun Microsystems, Inc. In a typical Oracle RAC installation, Oracle Automatic Storage Management (ASM) [3] acts as the underlying, clustered volume manager. ASM provides the database administrator with a simple storage management interface that is consistent across all server and storage platforms. As a vertically integrated file system and volume manager, purpose-built for Oracle database files, ASM provides the performance of raw I/O with the easy management of a file system. Oracle ASM provides the basis for a shared storage pool in Oracle enterprise grid architectures. Sun Logical Domains allow the creation of Sun Logical Domains (LDoms) is a virtualization and partitioning solution supported multiple virtual systems on a single physical on Sun CoolThreads technology-based servers — those powered by UltraSPARC® system. T1, T2, and T2 Plus processors with Chip Multithreading Technology (CMT). Sun LDoms allow the creation of multiple virtual systems on a single physical system. Each virtual system is called a logical domain and runs its own copy of the operating system. Sun’s CoolThreads technology-based servers, configured with up to 256 virtual CPUs and 512 GB of physical memory, are powerful systems which can easily be configured with LDoms to consolidate and virtualize multiple physical servers onto a single platform. Oracle Database and Oracle Real Application Clusters (Oracle RAC) are the leading database applications, and as such are frequently used on servers. With virtualization and consolidation, Oracle Database and Oracle RAC can now run on selected certified virtual environments, such as Sun Logical Domains, and use virtual devices. In addition, multiple Oracle Database servers or Oracle RAC nodes can be located on the same physical platform, introducing a new way to deploy databases. Logical domains overview A domain can take one or more of the With LDoms, domains have roles which define their characteristics. The roles of a following roles: domain depend on how the domain is configured, which resources it owns and what • I/O Domain services it provides. A single domain can have one or multiple roles. An Oracle RAC • Control Domain node can be located on a domain with any role, as long as that domain provides • Service Domain • Guest Domain the appropriate devices and resources required and supported by the Oracle environment. A logical domain can take one or more of the following roles: Running Oracle RAC in an I/O domain can • I/O Domain — An I/O domain is a domain that owns some physical I/O resources, result in better performance, but only a such as physical disks or physical network interfaces, and has direct access to limited number of I/O domains can be the corresponding physical I/O devices. In I/O domains, the operating system created per server. running in the domain uses regular (non-virtualized) drivers of the operating system to access devices. Running the Solaris™ operating system (Solaris OS) in an I/O domain is very similar to running the Solaris OS on a non-virtualized system. Similarly, running and configuring Oracle RAC in an I/O domain is no different than running and configuring Oracle RAC on any other Sun SPARC server.
  • 5. 3 Running Oracle RAC on Sun Logical Domains Sun Microsystems, Inc. By having direct access to physical I/O devices, an I/O domain provides optimal I/O performance. However, the number of I/O domains that can be created on a single platform is limited by the I/O resources available on that platform; this limit is currently tied to the number of PCI buses available. As a result, only a limited number of I/O domains can be created. For example, a maximum of four I/O domains can be created on the Sun SPARC Enterprise® T5440 server. It is not generally recommended to run • Control Domain — The control domain is the domain that runs the Logical Oracle RAC in a control domain because of Domains Manager software, which is used to configure and manage all domains security concerns. on the platform. The control domain is usually also an I/O domain and, therefore, running Oracle RAC in the control domain is similar to running Oracle RAC in an I/O domain. However, for management and security concerns, it is not recommended to run Oracle RAC in the control domain. The control domain has a privileged connection with the hypervisor, which allows it to control other domains. The security of the control domain should be carefully protected; if control domain security is compromised, a malicious user gaining privileged access on the control domain could take control of all other domains on the platform. Any application running in the control domain should be properly configured to prevent such security risks. It is not generally recommended to • Service Domain — A service domain is a domain that provides virtual device run Oracle RAC in a service domain, for services (such as virtual disk or virtual network service) to some other domains. performance reasons and to avoid the A service domain is usually also an I/O domain, therefore running Oracle RAC in possibility of negatively affecting virtual device services. a service domain is similar to running Oracle RAC in an I/O domain. However, for performance reasons and to avoid negatively affecting virtual device services, running Oracle RAC in a service domain is not recommended. A service domain will consume some CPU, memory and I/O resources to provide services to other domains. Therefore, a service domain must be configured with sufficient resources to handle the workload due to services provided to other domains and for the workload generated by applications (such as Oracle RAC) running on the domain itself. Moreover, Oracle RAC can sometimes reboot the system it is running on. The reboot of a service domain will not bring down or reset guest domains using that service domain. However, I/O requests issued from these guest domains will be suspended while the service domain is down, and they will automatically resume once the service domain is up and running again. When running Oracle RAC in a service domain, keep in mind that Oracle RAC might reboot that service domain and that this action will temporary block I/O requests of guest domains using that service domain. Oracle RAC can run in a guest domain and • Guest Domain — A guest domain is a domain which is not an I/O domain but use virtual devices. which is a consumer of virtual device services provided by some service domains. A guest domain does not have any physical I/O devices, but only virtual I/O
  • 6. 4 Running Oracle RAC on Sun Logical Domains Sun Microsystems, Inc. devices such as virtual disks and virtual network interfaces. Oracle RAC can run in a guest domain and use virtual devices, and this configuration is the focus of this document. In addition, a system running LDoms will have a primary domain. The primary domain is not a domain role, but is the name of the first domain created on the system. The primary domain initially has the roles of a control domain and I/O domain. Typically, this domain is also used as a service domain and provides virtual disk and network services to guest domains created on the platform. Oracle RAC nodes Oracle RAC can be run on any domain, regardless of its roles (although it is not recommended to run Oracle RAC in the control domain or in a service domain). The main choice is to run Oracle RAC on either a guest domain or an I/O domain. An I/O domain will provide optimal I/O performance, because it has direct access to physical I/O devices, but the number of I/O domains on a platform is limited. On the other hand, a guest domain is more flexible and supports more dynamic operations because all its resources and devices are virtualized. A configuration should not mix Oracle RAC nodes running in I/O domains with Oracle RAC nodes running in guest domains. Although such a configuration might be technically possible, it can create a complex setup that is difficult to manage and is easily error prone. Either all Oracle RAC nodes should be running in I/O domains, or all should be running in guest domains. Deployment options With server virtualization, it is possible to run multiple virtual machines and operating systems on a single physical system. This capability makes it possible to host multiple nodes of the same cluster on a single physical system. Two main variants for deploying Oracle RAC with Logical Domains are considered, as shown in Figure 1: Oracle RAC nodes can be placed in Logical Domains on the same physical server Server 1 Server 1 Server 2 (development variant) to reduce costs, or can be placed on logical domains on Idom1 separate physical server (production Idom1 Idom1 variant) for better availability. Oracle RAC Idom2 Oracle RAC Development Production Deployment Deployment Figure 1. Deployment options.
  • 7. 5 Running Oracle RAC on Sun Logical Domains Sun Microsystems, Inc. • Development — All Oracle RAC nodes are located on domains on the same physical server. This variant is convenient for development or evaluation because it reduces the amount of hardware required (only one physical server). However, this configuration is not intended for running a production environment because the physical server is then a single point of failure: if the entire server goes down then all nodes will be down and the entire Oracle RAC cluster will unavailable. • Production — Oracle RAC nodes are placed on separate physical servers. This variant is recommended for a production environment, because in this configuration nodes are on different physical servers and there is no single point of failure. Of course, both variants can be mixed. Just keep in mind that nodes located on the same physical server can represent a single point of failure. Software requirements This section discusses the software requirements for deploying Oracle RAC on Sun Logical Domains, including Logical Domains Manager software, required operating system version and patches, firmware, and Oracle RAC software. Logical Domains requirements Running Oracle RAC with Logical Domains requires the use of Logical Domains Manager 1.0.3 or later. The operating system in all domains should be at least Solaris 10 05/08 (Update 5) with the following patches: • 138042-02 or later • 137111-01 or later • 137042-01 or later • 138056-01 or later • 127111-05 or later Servers should have firmware corresponding to LDoms 1.0.3 or later and include the fix for bug 6725223 (vcpu dr with heavy traffic causes loss of network connectivity for guest domains). Table 1 shows the minimum firmware version required, depending on the platform type and LDoms version. These minimum firmware versions all include the fix bug 6725223.
  • 8. 6 Running Oracle RAC on Sun Logical Domains Sun Microsystems, Inc. Table 1. Minimum firmware versions. System LDoms 1.0.3 LDoms 1.1 UltraSPARC T1 processor-based systems 6.6.7 or later 6.7.0 or later UltraSPARC T2 processor-based systems Sun SPARC Enterprise® 7.1.6 or later T5140/T5240 Servers Sun SPARC Enterprise UltraSPARC T2 Plus 7.1.7.d or later T5440 Server 7.2.0 or later processor-based Sun Netra™ T5440 systems 7.1.6.e or later Server Sun Blade™ T6340 N/A Server Module Each firmware is distributed as a patch depending on the system used. Refer to “Firmware patches” on page 32 for the list of corresponding firmware patch for each platform. Check the Logical Domains Release Notes documentation [4] for more information about firmware and required patches. Oracle Running Oracle RAC on Logical Domains requires the use of Oracle 10g R2 (Oracle 10.2.0.4). Later versions might also be supported. Refer to the Oracle documentation to check if a particular version is supported and for any additional requirements. Information can be found on the Oracle MetaLink Web site: • http://www.oracle.com/technology/support/metalink/index.html • http://www.oracle.com/technology/products/database/clustering/certify/ tech_generic_unix_new.html Hardware configuration Any server supporting Logical Domains can be used with Oracle RAC. Refer to the latest Logical Domains Release Notes documentation [4] for a complete list of systems supporting Logical Domains. Some additional hardware, such as external storage arrays or network switches, may be needed depending on the selected configuration and deployment variant. As an example, this document studies the deployment of a two-node Oracle RAC cluster where each Oracle RAC node is located on a LDoms guest domain on a different physical server (production variant). Figure 2 shows the hardware configuration and cabling.
  • 9. 7 Running Oracle RAC on Sun Logical Domains Sun Microsystems, Inc. Server 1 (T5240) Server 2 (T5240) 2 UltraSPARC T2 Plus Processors 2 UltraSPARC T2 Plus Processors (128 CPU Threads) (128 CPU Threads) 64 GB Memory 64 GB Memory Dual Onboard NICs Onboard NICs Dual Onboard Port (nxge) (nxge) Port Onboard Disk HBA HBA Disk Controller Controller A B 0 1 2 3 3 2 1 0 B A 1Gb Ethernet switch Internal Private Network Disks 1Gb Ethernet switch Public Network Second External Storage Sun StorageTek 6140 16 x 280 GB First External Storage Sun StorageTek 6140 16 x 280 GB Figure 2. Hardware configuration. . This example uses the following hardware. • Two Sun SPARC Enterprise T5240 servers, each with 128 CPU threads and 64 GB of memory. The Sun SPARC Enterprise T5240 server contains two UltraSPARC T2 Plus processors. Each UltraSPARC T2 Plus processor is made of 8 CPU cores, and each CPU core has 8 CPU threads, providing a total of 2x8x8 = 128 CPU threads per system. The LDoms software virtualizes each CPU thread as a virtual CPU, making 128 virtual CPUs available for creating domains. • One internal disk is used on each server as the system disk of the control domain. The Sun SPARC Enterprise T5240 server can have up to sixteen internal disks. • Two Sun StorageTek™ 6140 storage arrays, each with sixteen 280 GB Fibre Channel (FC) disk drives. Each storage array is connected to both servers, and each server should be connected to the same array controller (A or B). The first storage array provides one local disk to each guest domain. The second storage array is used to provide five shared disks (voting disks, OCR disk and ASM disk) to the Oracle RAC nodes. Each volume is owned by one and only one controller; therefore, each server using this volume must be connected to the same owning controller (for example, Server A to port 1 on Controller A, and Server B to port 2 on Controller A).
  • 10. 8 Running Oracle RAC on Sun Logical Domains Sun Microsystems, Inc. • Two 4 Gb dual-port FC-AL host bus adapters (HBA), one for each server. These HBAs are used to connect the two storage arrays to both servers. Each HBA has two ports. On each server, the first port is connected to the first storage array, and the second port to the second storage array. • Two 1 Gb Ethernet switches. One switch is used to interconnect the two servers and create a private network to be used by Oracle RAC. The second switch is also connected to the two servers, but it provides the public network and could be connected to a LAN or a WAN. • The on-board network interfaces present on each server are used for network communications. The Sun SPARC Enterprise T5240 server has four on-board 1 Gb Ethernet network interfaces. The first interface (port 0) is used for the public network and connected to the corresponding switch. Two other interfaces (port 2 and 3) are used to provide redundant access to the private network and they are connected to the other switch. One interface (port 1) is not used. Note that this configuration provides a minimum hardware redundancy. It provides a dual connection to the private network to meet the minimum requirement of Oracle RAC. Hardware redundancy can be improved by: • Using additional HBAs to provide redundant access paths to the storage arrays. • Using hardware or software RAID solutions to duplicate on-disk data. • Using the available on-board network interface (port 1) to provide redundant access paths to the public network. • Using additional network switches to create a redundant private network and have redundant access to the public network. • Using additional network interface adapters to provide PCI bus-level redundancy to access private and public networks. Server configuration This section includes general configuration guidelines that are recommended when setting up Oracle RAC on LDoms, and the specific configuration details used for this example configuration. Configuration guidelines The following configuration guidelines are recommended when setting up Oracle RAC on LDoms: • It is not recommended to run Oracle RAC in the control domain, unless the system is configured with a single domain (which is the control domain). • It is not recommended to run Oracle RAC in a service domain. • In an Oracle RAC configuration, Oracle RAC nodes should either all be running
  • 11. 9 Running Oracle RAC on Sun Logical Domains Sun Microsystems, Inc. in I/O domains, or all be running in guest domains. An Oracle RAC configuration should not mix Oracle RAC nodes running in I/O domains with Oracle RAC nodes running in guest domains. • Each domain running Oracle RAC should have a minimum of 8 virtual CPUs (1 CPU core) and 4 GB of memory. • Each service domain providing virtual devices (virtual disk and virtual network) to an Oracle RAC guest domain should have a minimum of 16 virtual CPUs (2 CPU cores) and 4 GB of memory. • When running Oracle RAC in guest domains, the private network redundancy should be configured using IP multipathing (IPMP) in service domains providing virtual network access to the Oracle RAC guest domains. • Virtual disks shared by Oracle RAC guest domains should be backed by full physical SCSI disks or SCSI LUNs. A shared virtual disk should not be backed by a file or a volume, and it should not be a single-slice disk. • If several Oracle RAC guest domains are located on the same physical server then each guest domain should access shared disks using a different disk controller or HBA, otherwise the system will be unable to correctly handle SCSI reservations. Thus, if two Oracle RAC guest domains are located on the same physical server and accessing shared disks using the same service domain, then these shared disks should be exported from the service domain to each of those guest domains using different disk paths. . Configuration details In the example presented in this document, each server is configured with two domains: the control domain and one guest domain (Figure 3 on page 10). The control domain is also the primary domain, and therefore also an I/O domain. Furthermore, the control domain is used as a service domain, providing virtual device services (virtual disk and virtual network) to the guest domain. For simplicity, the name control domain is used to designate all roles of the control, I/O, and service domain. Each domain is allocated the following set of resources, as listed in Table 2: Table 2. Resources allocated to each domain. Domain CPU Memory Devices Control Domain 32 virtual CPUs 16 GB All PCI buses (internal disks, on-board (4 CPU cores) NICs, HBA connected to the two storage arrays) Guest Domain 48 virtual CPUs 24 GB Virtual disks and virtual network (6 CPU cores) interfaces provided by the control domain
  • 12. 10 Running Oracle RAC on Sun Logical Domains Sun Microsystems, Inc. This configuration does not use all resources of the system; there are still 48 virtual CPUs (6 CPU cores) and 24 GB of memory available. These remaining resources can be used to create additional guest domains or to reconfigure the existing domains if more resources are required, for example to handle a more important workload. Control/Server/IO Domain Guest Domain Operating System Operating System (Solaris 10) (Solaris 10) Hypervisor 16 GB Memory 32 Virtual CPUs 24 GB Memory 48 Virtual CPUs PCI Buses Onboard Disk Virtual Virtual HBA NICs Disks NICs Controller Network Internal External Disks Disks Figure 3. Resource assignment within a physical server. . To act as a service domain, the control domain will have the following virtual device services: • One virtual disk service (primary-vds0) used to export physical disks as virtual disks to the guest domain. • One virtual console concentrator service (primary-vcc0) used to provide access to the virtual console of the guest domain. This service will use the port range 5000-5100 for virtual consoles access. • One virtual switch service (primary-vsw0) associated with the primary network interface (nxge0). This virtual switch will be part of the public network required by Oracle RAC. The control domain will be configured to use vsw0 as its primary network interface instead of nxge0. This interface is directly connected to the virtual switch and will allow the control domain to have a network connection with the guest domain and with the external network (through nxge0 which is associated with primary-vsw0). • One virtual switch service (primary-vsw1) associated with no physical network interface. This virtual switch will be part of the private network required by Oracle RAC.
  • 13. 11 Running Oracle RAC on Sun Logical Domains Sun Microsystems, Inc. The complete configuration of the public and private networks is described in “Network configuration” on page 16. Software installation and configuration The following tasks are part of server software installation: • Solaris installation (see below) • LDoms installation (see below) • Control domain configuration (see page 12) • Guest domain configuration (see page 14) Additional configuration tasks, including network and storage related tasks, are covered in later sections of this document. Oracle installation occurs as a separate step, after the network and storage devices are configured. Solaris installation Initially, Logical Domains are not enabled on Sun CoolThreads technology-based servers. The first step is to install the Solaris OS and the appropriate patches. Refer to the Solaris OS installation documentation for more information on how to install the Solaris OS on servers with SPARC processors. In our example, the operating system is installed on the first internal disk of the server. New servers come pre-installed with the Solaris OS. For these systems, ensure that . the appropriate release of Solaris OS is installed and check that the required patches are present. You may also choose to re-install the entire system so that it matches your installation requirements. After the Solaris OS is installed, the system can be configured and enabled to use Logical Domains. LDoms installation Refer to the Logical Domains Administration Guide [5] for a complete procedure on how to install Logical Domains. Basically, the following actions are performed on each physical server. This example assumes that the Solaris OS and the required patches are already installed on each server: 1. Ensure that the system firmware matches the LDoms release that is planned for installation. Refer to the Logical Domains Release Notes [4] to find the appropriate firmware version and to the Logical Domains Administration Guide [5] for instructions to upgrade the system firmware. 2. Download the Logical Domains Manager software, version 1.0.3 or later, from the Sun Microsystems Web site [6]. 3. Extract the archive.
  • 14. 12 Running Oracle RAC on Sun Logical Domains Sun Microsystems, Inc. 4. Install the SUNWldm.v package. # pkgadd -d LDoms_Manager-1_0_3/Product SUNWldm.v 5. Optionally, install the JASS package if you want to harden the control domain. 6. Enable the Logical Domain Manager (ldmd) and the Virtual Network Terminal Server (vntsd) services. # svcadm enable ldmd # svcadm enable vntsd 7. Set up the PATH variable to point to the LDoms binaries. # PATH=$PATH:/opt/SUNWldm/bin 8. Optionally, update the PATH variable in the .profile file. Control domain configuration Configure a control domain on each After the LDoms software has been installed, the current system has to be physical server. reconfigured to become the control domain (also known as the primary domain). To do so, the following actions are performed on each physical server: 1. Add a virtual disk server (vds). # ldm add-vds primary-vds0 primary . 2. Add a virtual console concentrator (vcc). # ldm add-vcc port-range=5000-5100 primary-vcc0 primary 3. Determine the primary network interface of the system. This is usually the first configured interface, for example nxge0 or e1000g0. 4. Add a virtual switch associated with the primary network interface. This virtual switch will be used for the public network. # ldm add-vsw net-dev=nxge0 primary-vsw0 primary 5. Add a second virtual switch, not associated with any physical network interface. This virtual switch will be used for the Oracle RAC private network. # ldm add-vsw primary-vsw1 primary 6. Change the primary interface to be the first virtual switch interface. The following command configures the control domain to plumb and use the interface vsw0 instead of nxge0. # mv /etc/hostname.nxge0 /etc/hostname.vsw0
  • 15. 13 Running Oracle RAC on Sun Logical Domains Sun Microsystems, Inc. 7. Configure the control domain (primary) with 32 virtual CPUs (4 CPU cores) and 16 GB of memory: # ldm set-vcpu 32 primary # ldm set-memory 16G primary # ldm set-crypto 4 primary 8. Save the configuration and reboot the system # ldm add-spconfig initial # init 6 After the system reboots, LDoms will be enabled and the system will now be configured with one domain: the control domain (primary domain). From the control domain, additional domains can then be created and configured. Guest domains This example creates one guest domain on After the control domain has been configured, one can create the guest domains each physical server. that are used as Oracle RAC nodes. One guest domain is created on each physical server. The first guest domain is created on the first server with the name ldom1, the second guest domain is created on the second server with the name ldom2. Each guest domain (ldom1 and ldom2) is initially created with the following resources: • 48 virtual CPUs . • 16 GB of memory • One virtual network interface (vnet0) connected to the virtual switch primary- vsw0. This virtual network interface will provide access to the public network. • One virtual network interface (vnet1) connected to the virtual switch primary- vsw1. This virtual network interface will provide access to the private network. • One virtual disk (which appears as c0d0 in the guest domain) which is a LUN from the first storage array. The domain ldom1 uses the LUN1 of the storage array (c3t0d1), and ldom2 uses the LUN2 of the same storage array (c3t0d2). This virtual disk will be used as the system disk of the guest domain and hosts the operating system. To simplify the description of the configuration, guest domains are initially created with only one disk (c0d0) which is used as the system disk for the operating system. Additional disks required for the Oracle RAC configuration are added later. The initial configuration of guest domains is shown in Figure 4 on page 14.
  • 16. 14 Running Oracle RAC on Sun Logical Domains Sun Microsystems, Inc. Server 1 Idom1 Control Domain Network vnet0 primary-vsw0 nxge0 vnet1 primary-vsw1 c0d0 primary-vds0 c3t0d1 LUN1 rootdisk Idom1 Storage Array 1 LUN2 Server 2 rootdisk Idom2 Idom1 Control Domain c0d0 primary-vds0 c3t0d2 vnet1 primary-vsw1 vnet0 primary-vsw0 nxge0 . Figure 4. Guest domain initial configuration. Guest domain configuration Each guest domain can be created with the following commands: 1. Create guest domain ldom1, from the control domain on server 1: # ldm create ldom1 # ldm set-vcpu 48 ldom1 # ldm set-memory 24G ldom1 # ldm set-crypto 6 ldom1 # ldm add-vnet vnet0 primary-vsw0 ldom1 # ldm add-vnet vnet1 primary-vsw1 ldom1 # ldm add-vdsdev /dev/rdsk/c3t0d1s2 ldom1@primary-vds0 # ldm add-vdisk ldom1 ldom1@primary-vds0 ldom1
  • 17. 15 Running Oracle RAC on Sun Logical Domains Sun Microsystems, Inc. 2. Create guest domain ldom2, from the control domain on server 2: # ldm create ldom2 # ldm set-vcpu 48 ldom2 # ldm set-memory 24G ldom2 # ldm set-crypto 6 ldom2 # ldm add-vnet vnet0 primary-vsw0 ldom2 # ldm add-vnet vnet1 primary-vsw1 ldom2 # ldm add-vdsdev /dev/rdsk/c3t0d2s2 ldom2@primary-vds0 # ldm add-vdisk ldom2 ldom2@primary-vds0 ldom2 After domains have been created, they can be bound and started with the following commands: 1. To bind and start ldom1, execute the following commands from the control domain on server 1: # ldm bind ldom1 # ldm start ldom1 2. To bind and start ldom2, execute the following commands from the control domain on server 2: # ldm bind ldom2 # ldm start ldom2 The console of a domain can be accessed when the domain is bound. To do so, the . console port associated with the domain is retrieved with the command ldm ls. Then the console can be accessed using the telnet command on the appropriate console port. For example, if the output from the ldm ls command indicates that the console port associated with a domain is 5000, then the following command can be used to access the console of that domain from the control domain. # telnet localhost 5000 After each guest domain is started, the appropriate Solaris OS and patches must be installed in those domains. The installation can be done over the network, from a DVD, or by using a DVD ISO image. Refer to the Logical Domains Administration Guide [5] for more information. Once the installation of all guest domains is complete, one can continue setting up the systems so that they can be used with Oracle RAC. The additional setup includes configuration of a public and a private network (see “Network configuration” on page 16), and the addition of shared storage (see “Storage configuration” on page 25).
  • 18. 16 Running Oracle RAC on Sun Logical Domains Sun Microsystems, Inc. Network configuration This section describes the networking configuration used in this example and includes network interfaces layout, IP address assignment and host names. It also describes the IPMP configuration and routing for the private network. Network layout The configuration requires two networks: • A public network which is available for general use and which connects the domains. This network can also be interconnected with any other network such as a LAN or a WAN. • A private network used by Oracle RAC (for example for the heartbeat and cache fusion). This network interconnects the two Oracle nodes and should not be connected to any other network. In particular, the private network should not be connected to the public network, and it should not be used by any application other than Oracle RAC. Public network The public network connects the primary network interfaces of the control domains (vsw0) and of the guest domains (vnet0), as shown in Figure 5. Each interface is connected to the first virtual switch (primary-vsw0) of the control domain. The virtual switch is also connected to the external public network using the nxge0 interface. This public network can also be connected to a LAN or WAN. . Server 1 Idom1 Control Domain vnet0 primary-vsw0 nxge0 vsw0 Public Network and VIP Server 2 Idom2 Control Domain vsw0 vnet0 primary-vsw0 nxge0 Figure 5. Public network configuration.
  • 19. 17 Running Oracle RAC on Sun Logical Domains Sun Microsystems, Inc. Private network The private network connects the secondary network interfaces of the guest domains (vnet1), as shown in Figure 6 on page 17. Each interface (vnet1) is connected to the second virtual switch (primary-vsw1). Each control domain is also connected to this switch by the vsw1 interface. The two servers are physically connected using interfaces nxge2 and nxge3 on each system. IPMP is used on top of nxge2 and nxge3 to provide redundancy. Each control domain is configured to use IP routing between the virtual switch interface (vsw1) and the nxge2 and nxge3 interfaces (through IPMP), interconnecting the physical and the virtual private networks. Server 1 Idom1 Control Domain vnet1 primary-vsw1 IPMP Group nxge2 vsw1 nxge3 Private Network Server 2 (Interconnect) Idom2 Control Domain IPMP Group nxge3 . vsw1 nxge2 vnet1 primary-vsw1 Figure 6. Private network configuration.
  • 20. 18 Running Oracle RAC on Sun Logical Domains Sun Microsystems, Inc. Network interface summary Figure 7 summarizes the interconnection of the network interfaces of the control and guest domains within a single server. Server Guest Domain Control Domain vnet1 primary-vsw1 IPMP Group nxge2 Private Network vsw1 (Interconnect) nxge3 vsw0 Public Network vnet0 primary-vsw0 nxge0 and VIP Figure 7. Networking within a physical server. .
  • 21. 19 Running Oracle RAC on Sun Logical Domains Sun Microsystems, Inc. Network interfaces and host names The configuration requires multiple host names and IP addresses. Table 3 summarizes the different host names and their association with network interfaces and systems: Table 3. Host name and IP address assignments. Server Domain Interface Host name Description Control Domain — Server #1 1 control vsw0 rac01 Public network, vsw interface (primary) 1 control vsw1 rac01-vsw1 Private network, vsw interface 1 control nxge2 rac-node-pri1 Private interconnect, 1st IPMP interface 1 control nxge3 rac-node-pri2 Private interconnect, 2nd IPMP interface 1 control nxge2:1 rac-node-ext1 Private interconnect, 1st IPMP test address 1 control nxge3:1 rac-node-ext2 Private interconnect, 2nd IPMP test address Guest Domain — Server #1 (ldom1) 1 ldom1 vnet0 rac-node1 Node 1, public network (primary) 1 ldom1 vnet1 node1-priv Node 1, private network 1 ldom1 none rac-nodevp1 Node 1, public network, virtual IP Control Domain — Server #2 2 control vsw0 rac02 Public network, vsw interface (primary) 2 control vsw1 rac02-vsw1 Private network, vsw interface 2 control nxge2 rac-node-pri3 Private interconnect, 1st IPMP interface . 2 control nxge3 rac-node-pri4 Private interconnect, 2nd IPMP interface 2 control nxge2:1 rac-node-ext3 Private interconnect, 1st IPMP test address 2 control nxge3:1 rac-node-ext4 Private interconnect, 2nd IPMP test address Guest Domain — Server #2 (ldom2) 2 ldom2 vnet0 rac-node2 Node 2, public network (primary) 2 ldom2 vnet1 node2-priv Node 2, private network 2 ldom2 none rac-nodevp2 Node 2, public network, virtual IP Other N/A N/A N/A priv-switch Private switch These host names and the associated IP addresses must be defined in the naming service used by the domains, for example with DNS, NIS or /etc/hosts. The definition must be consistent across all domains. In this example configuration, the /etc/hosts file is defined as follows on all domains:
  • 22. 20 Running Oracle RAC on Sun Logical Domains Sun Microsystems, Inc. # cat /etc/hosts # # Internet host table # 127.0.0.1 localhost loghost # Public Network 10.1.9.101 rac01 # vsw0 – control domain server-1 10.1.9.102 rac02 # vsw0 – control domain server-2 10.1.9.111 rac-node1 # vnet0 – guest domain, server-1 10.1.9.112 rac-node2 # vnet0 – guest domain, server-2 10.1.9.121 rac-nodevp1 # vip of rac-node1 10.1.9.122 rac-nodevp2 # vip of rac-node2 # Private Network 18.1.1.1 priv-switch # private switch 18.1.1.10 rac-node-pri1 # nxge2 – guest domain, server-1 18.1.1.11 rac-node-pri2 # nxge3 – guest domain, server-1 18.1.1.12 rac-node-ext1 # IPMP test address for server-1 18.1.1.13 rac-node-ext2 # IPMP test address for server-1 18.1.1.14 rac-node-pri3 # nxge2 – guest domain, server-2 18.1.1.15 rac-node-pri4 # nxge3 – guest domain, server-2 18.1.1.16 rac-node-ext3 # IPMP test address for server-2 . 18.1.1.17 rac-node-ext4 # IPMP test address for server-2 192.168.10.10 rac01-vsw1 # vsw1 – control domain server-1 192.168.10.11 rac02-vsw1 # vsw1 – control domain server-2 192.168.10.111 node1-priv # vnet1 – guest domain, server-1 192.168.10.112 node2-priv # vnet1 – guest domain, server-2 Figure 8 on page 21 shows the assignment of IP addresses for each network interface. • The nxge0 interface has no IP address because it is associated with the first virtual switch (primary-vsw0) and the system is using the interface of that virtual switch (vsw0). • The second virtual switch (primary-vsw1) is not associated with any physical network interface, but it uses IP routing between its interface (vsw1) and the nxge2 and nxge3 interfaces (through IPMP) to communicate with the external private network. • The vnet1 and vsw1 interfaces belong to network 192.168.10.0/24 and are used for the Oracle RAC private network. This network is not available to users. • The vnet0 and vsw0 interfaces belong to network 10.1.9.0/24 and are used for
  • 23. 21 Running Oracle RAC on Sun Logical Domains Sun Microsystems, Inc. public networking and virtual IP (VIP). This network is available to users. • The nxge2 and nxge3 interfaces belong to network 18.1.1.0/24 and form an IPMP group of active/standby interfaces. These interfaces are used for inter-host routing on the private network. Routing is per-host based. Routing is required because the second virtual switch (primary-vsw1) can not be directly associated with a pair of physical interfaces. • The private physical switch has IP address 18.1.1.1. This address is used as the IPMP target address, for checking the status of the private network. Server 1 Idom1 Control Domain vnet1 nxge2 primary-vsw1 192.168.10.111 18.1.1.10 & 18.1.1.12 vsw1 IP routing (-host) IPMP 192.168.10.10 192.168.10.0/24 Group vsw0 nxge3 10.1.9.101 18.1.1.11 & 18.1.1.13 vnet0 primary-vsw0 nxge0 10.1.9.111 Public Network Private Network . 10.1.9.0/24 18.1.1.0/24 Server 2 Idom2 Control Domain vnet0 nxge0 primary-vsw0 10.1.9.112 vsw0 nxge3 10.1.9.102 18.1.1.15 & 18.1.1.17 vsw1 IP routing (-host) IPMP 192.168.10.11 192.168.10.0/24 Group vnet1 nxge2 primary-vsw1 192.168.10.112 18.1.1.14 & 18.1.1.16 Figure 8. IP address assignment.
  • 24. 22 Running Oracle RAC on Sun Logical Domains Sun Microsystems, Inc. Private network configuration Configuration of the private network involves specifying the network interface name, configuring IPMP in active/standby node, and configuring IP routing. Network interface On the control domain of both servers, configure the virtual network instance (vsw1) of the second virtual switch (primary-vsw1): 1. On the control domain of server 1: # cat /etc/hostname.vsw1 rac01-vsw1 2. On the control domain of server 1: # cat /etc/hostname.vsw1 rac02-vsw1 IPMP In addition, the following setup is required to configure IPMP in active/standby mode for interfaces nxge2 and nxge3: 1. On the control domain of server 1: # cat /etc/hostname.nxge2 rac-node-pri1 netmask 255.255.255.0 broadcast + . group priv2 up addif rac-node-ext1 deprecated -failover netmask 255.255.255.0 broadcast + up # cat /etc/hostname.nxge3 rac-node-ext2 netmask 255.255.255.0 broadcast + deprecated group priv2 -failover standby up
  • 25. 23 Running Oracle RAC on Sun Logical Domains Sun Microsystems, Inc. 2. On the control domain of server 2: # cat /etc/hostname.nxge2 rac-node-pri3 netmask 255.255.255.0 broadcast + group priv2 up addif rac-node-ext3 deprecated -failover netmask 255.255.255.0 broadcast + up # cat /etc/hostname.nxge3 rac-node-ext4 netmask 255.255.255.0 broadcast + deprecated group priv2 -failover standby up IP routing IP routing must be configured for the private network. Specifically, the physical private network 18.1.1.0/24 between the servers must be connected with the virtual private network 192.168.10.0/24 of the domains (see Figure 8 on page 21). 1. IP Routing can be activated by enabling IPv4 forwarding on both control domains: # svcadm enable svc:/network/ipv4-forwarding:default 2. Next, static IP routes must be defined to create the appropriate routing. This . can be accomplished by creating and executing the following script (/etc/rc3.d/S76myroutes) on the control and guest domains:
  • 26. 24 Running Oracle RAC on Sun Logical Domains Sun Microsystems, Inc. # cat /etc/rc2.d/S76myroutes #!/bin/bash case `uname -n` in rac-node1) route add 18.1.1.0/24 rac01-vsw1 route add -host rac02-vsw1 rac01-vsw1 route add -host node2-priv rac01-vsw1 ;; rac-node2) route add 18.1.1.0/24 rac02-vsw1 route add -host rac01-vsw1 rac02-vsw1 route add -host node1-priv rac02-vsw1 ;; rac01) route add -host priv-switch priv-switch -static route add -host rac02-vsw1 rac-node-pri3 route add -host node2-priv rac-node-pri3 ;; rac02) route add -host priv-switch priv-switch -static route add -host node1-priv rac-node-pri1 route add -host rac01-vsw1 rac-node-pri1 ;; esac .
  • 27. 25 Running Oracle RAC on Sun Logical Domains Sun Microsystems, Inc. Storage configuration Guest domains were initially created with only one virtual disk (c0d0) used as the system disk for the operating system. In order to run Oracle RAC, additional disks must be assigned to both guest domains. These additional disks need to be visible from both guest domains. Shared and virtual disks Figure 9 shows the virtualization of a shared LUN, exported from external storage, as a virtual disk to the guest domain. The storage array is connected to the control domain, which exports the LUN as a virtual disk to the guest domain. When adding virtual disk drives to the guest domains it is recommended that LUNs are exported in the same order on both systems so that virtual disks will have the same device names on both nodes. Server 1 Server 2 Idom1 Idom2 c0d1 c0d1 LUN0 is multihosted and visible with the same name (c2t1d0) on both control Control Domain Control Domain domains. primary-vds0 primary-vds0 Storage Array . c2t1d0 Storage Array c2t1d0 LUNO Figure 9. Shared storage is accessible to multiple domains using the same device name. Adding shared disks to guest domains In this configuration, five LUNs from the second storage array are used as shared disks. Because the hardware configuration is the same on both servers, the LUNs from the second storage array appear with the same device names (c2t1d0 to c2t1d4) on both control domains. Note: LUNs may (and often will) appear with different names on different servers. LUN names in control domains are not required to be identical. LUN names within guest domains must be identical. This can easily be achieved by importing LUNs in the same order across all domains.
  • 28. 26 Running Oracle RAC on Sun Logical Domains Sun Microsystems, Inc. To export a LUN as virtual disk, execute the following commands. In the following example, c2t1d0s2 is the device name for the OCR LUN. 1. To add the LUN to ldom1, execute the following commands from the control domain of server 1: # ldm add-vdsdev /dev/rdsk/c2t1d0s2 ocr1@primary-vds0 # ldm add-vdisk ocr1 ocr1@primary-vds0 ldom1 2. To add the LUN to ldom2, execute the following commands from the control domain of server 2: # ldm add-vdsdev /dev/rdsk/c2t1d0s2 ocr2@primary-vds0 # ldm add-vdisk ocr2 ocr2@primary-vds0 ldom2 If LDoms 1.1 is used, then the new disk will be immediately added to the guest domain; otherwise, the guest domain must be rebooted for the new disk to become visible. Once the disk is visible, use the format(1m) command from any guest domain to partition the new disk and create the required partition for OCR. Check from all guest domains that the correct partitioning is visible. The same steps must be repeated for each shared disk (voting disks and ASM disk). Figure 10 shows the final configuration after all shared disks have been added to guest domains. .
  • 29. 27 Running Oracle RAC on Sun Logical Domains Sun Microsystems, Inc. Server 1 Server 2 Idom1 Idom2 c0d[1-5] c0d0 c0d0 c0d[1-5] Control Domain Control Domain primary-vds0 primary-vds0 c2t1d[0-4] c3t0d1 c3t0d2 c2t1d[0-4] Storage Array 1 LUN1 LUN2 rootdisk rootdisk Idom1 Idom2 Non-Shared LUNs Storage Array 2 LUN0 LUN1 LUN2 LUN3 LUN4 OCR Voting1 Voting2 Voting3 ASM Shared LUNs . Figure 10. Storage cabling. Oracle installation The installation of the Oracle RAC and Oracle database software is similar to a standard Oracle installation. Use network 10.1.9.0/24 for public and VIP networks, and 192.168.10.0/24 for the private network. Start with the installation of Oracle Clusterware and then apply the latest patch set (#3 at the time this document was written). Continue with the installation of Oracle database, and apply the same patch set this time to the Oracle database. If the system will use CPU dynamic reconfiguration then install Oracle patch 7172531 to avoid the error “ORA-7445 SIGSEGV WHEN CPU COUNT DYNAMICALLY CHANGED”.
  • 30. 28 Running Oracle RAC on Sun Logical Domains Sun Microsystems, Inc. Additional information This section contains additional information relevant to Oracle RAC deployments on Sun LDoms, including: • NTP (see below) • CPU dynamic reconfiguration (see below) • Performance considerations (see page 29) • Known issues (see page 29) NTP The system clock of the different domains should be synchronized. This can be done by using the network time synchronization protocol (NTP) across all domains. In this example the control domain on the first server (rac01) is used as a time source, and configured as an NTP server: # grep -v ^# /etc/inet/ntp.conf server 127.127.1.0 prefer broadcast 224.0.1.1 ttl 4 enable auth monitor driftfile /var/ntp/ntp.drift statsdir /var/ntp/ntpstats/ filegen peerstats file peerstats type day enable filegen loopstats file loopstats type day enable filegen clockstats file clockstats type day enable keys /etc/inet/ntp.keys . trustedkey 0 requestkey 0 controlkey 0 # touch /var/ntp/ntp.drift # svcadm enable ntp Other domains (rac02, rac-node1 and rac-node2) are configured as NTP clients: # grep -v ^# /etc/inet/ntp.conf multicastclient 224.0.1.1 # svcadm enable ntp CPU dynamic reconfiguration Logical Domains supports CPU dynamic reconfiguration. CPUs can be dynamically added or removed from any active domain, using the ldm add-vcpu or ldm rm- vcpu commands from the control domain. These commands can be used with a domain running Oracle RAC. When reducing the number of CPUs of a domain, ensure that enough CPUs are still available to efficiently handle the workload of the domain (an Oracle RAC guest domain should always have at least 8 virtual CPUs).
  • 31. 29 Running Oracle RAC on Sun Logical Domains Sun Microsystems, Inc. When using CPU dynamic reconfiguration, ensure that the Oracle patch 7172531 has been installed to avoid the error “ORA-7445 SIGSEGV WHEN CPU COUNT DYNAMICALLY CHANGED”. Performance considerations With the configuration shown in this example, control domains are responsible for I/O and network flow processing. Tests have shown that the CPU’s system load on control domains is around 15% for a storage I/O load of 300 MB/sec on each control domain and a network load around 25 MB/sec. Try to avoid any swap activity on the guest domains because any swap activity on the guest domains will generate additional I/O requests which must be handled by the control domains. Do not share CPU cores between domains, especially between two domains running the Oracle database. If CPU threads from the same CPU core are assigned to different domains, then this can reduce the efficiency of these CPU threads. Known issues The following issues are known to exist at the time this document was published. Queries with a high degree of parallelism (DOP) In some cases, when doing queries having a high degree of parallelism (DOP), you may observe the reboot of some nodes because of missed Oracle Cluster heartbeats. . The reason is that high DOP queries can generate a very high traffic of Oracle Cache (80-100%) requests over the private network which can prevent the distribution of the Oracle Cluster heartbeat if the private network is overloaded. How to monitor: 1. Monitor network interfaces load (use dim_STAT utility). Note: The dim_STAT utility is installed separately, and is not a part of the Solaris OS. Workaround: 1. Set the DEGREE property of involved tables to 48 or less. 2. Change the Clusterware variable misscount. The default value of misscount is 30 seconds. This defines the maximum amount of time Clusterware is waiting for all nodes to send their heartbeats. If a node is not able to deliver its heartbeat packets within this time then it is evicted. Refer to Oracle note 284752.1 on Oracle Metalink for setting this variable and carefully review the impact and recommendation from Oracle before changing this setting.
  • 32. 30 Running Oracle RAC on Sun Logical Domains Sun Microsystems, Inc. Solution: 1. Install LDoms patch 139562-02 on all domains. This patch improves virtual network device performance. 2. On UltraSPARC-T2 based systems, with LDoms 1.1 and Solaris 10 10/08 (Update 6), you can use network hybrid I/O if you have compatible network interfaces (this requires XAUI network adapter). Jumbo frames are not supported. The LDoms virtual switch and virtual network interfaces does not currently support jumbo frames. Support for jumbo frame is planned for the next LDoms release. IP Routing is required when using IPMP with virtual switches Although using IP routing is not the preferred setup for the Oracle RAC private network configuration, it has to be used in order to associate a virtual switch with network interfaces managed by IPMP and provide private network redundancy. Network performance might not be optimal with nxge interfaces Under certain conditions, the packet serializer of nxge network interfaces might perform poorly and impact network performances. This might create problems with Oracle Cache Fusion on the private network. A workaround to improve performance is to adjust a parameter of the nxge driver. This parameter will change the behavior of the serializer for all nxge interfaces. To enable the workaround, the following command has to be executed on the domain with the nxge interfaces (the control . domain in our example): # echo ’nxge_maxhrs/W 0’ | mdb -kw Note that this workaround will not be persistent across reboots of the domain. The command to enable the workaround can be included in a startup script (rc script) so that it is automatically executed if the system reboots. Another workaround is to use e1000g network interfaces instead of nxge interfaces for the private network. A final solution to this problem is expected to be delivered in a future patch and in a next update of Solaris OS. This problem is referenced as Sun bug 6756568 (1GbE nxge performance can be improved by up to 60% on Thunder/LDOMs). Clock skew messages Every few days, Oracle log files might report messages like these ones: AlarmHandler: clock skew detected, reseting interval timer skew: ctime 1182547970260687, ltime 1182546970265954, cclock 1227523221351199000, lclock 1227523214087618000, cdiff 999994733, tdiff 7263581000, diff 6263586267
  • 33. 31 Running Oracle RAC on Sun Logical Domains Sun Microsystems, Inc. This first message is just saying that the oprocd process has detected a clock skew, and that it has reset its interval timer. Then it presents the data as to how it determined the clock skew, and how big the skew was. These messages are harmless unless they occur very frequently and the skew increases, as a large skew could cause the oprocd process to eventually reboot the node. Workload used during the Oracle certification process Both online transaction processing (OLTP) and data warehousing (DW) types of databases were used simultaneously for the Oracle RAC certification. The OLTP database was made of SwingBench Order Entry 80GB database. The DW database was made of TPC-H database 100GB. The Oracle RAC cluster comprised four nodes spread on two physical servers (this is a mix of the development and production variants (see “Deployment options” on page 4). Each certification test was conducted with a system load close to 100%. Summary Oracle RAC can be installed on servers configured with Sun Logical Domains (LDoms), a virtualization technology that allows the creation of multiple virtual systems on a single physical system. Multiple Oracle RAC nodes can be configured on LDoms on the same physical server, for a lower-cost development option. Alternatively, Oracle RAC nodes can be placed on LDoms on separate physical servers to provide better availability for production deployments. . This paper presents an example configuration of the production variant, with Oracle RAC nodes placed in LDoms on two separate physical servers. Step-by-step instructions describe the complete configuration process, including LDoms creation and configuration, networking setup, and storage configuration. Configuration guidelines and software requirements are also included, to help administrators plan for their deployments of Oracle RAC on LDoms.
  • 34. 32 Running Oracle RAC on Sun Logical Domains Sun Microsystems, Inc. Appendices Firmware patches Table 4. Required firmware patches. System LDoms 1.0.3 LDoms 1.1 UltraSPARC T1 processor-based systems Sun Fire™ and SPARC Enterprise T2000 Server 136927-05 or later 139434-01 or later Sun Fire and SPARC Enterprise T1000 Server 136928-05 or later 139435-01 or later Sun Netra T2000 Server 136929-05 or later 139436-01 or later Sun Netra CP3060 ATCA Blade Server 136930-05 or later 139437-01 or later Sun Blade™ T6300 Server Module 136931-05 or later 139438-01 or later UltraSPARC T2 processor-based systems Sun SPARC Enterprise T5120 & T5220 Server 136932-04 or later 139439-01 or later Sun Blade T6320 Server Module 136933-06 or later 139440-01 or later Sun Netra T5220 Server 136934-05 or later 139442-01 or later Sun Netra CP3260 Server 136935-02 or later N/A UltraSPARC T2 Plus processor-based systems Sun SPARC Enterprise T5140 & T5240 Server 136936-07 or later 139444-01 or later Sun SPARC Enterprise T5440 Server 136937-03 or later 139446-01 or later Sun Netra T5440 Server 136938-02 or later 139445-01 or later . Sun Blade T6340 Server Module N/A 139448-01 or later
  • 35. 33 Running Oracle RAC on Sun Logical Domains Sun Microsystems, Inc. Logical Domains configuration example This section shows the Logical Domains configuration described as an example in this document. Configuration of the first control domain (rac01) NAME STATE FLAGS CONS VCPU MEMORY UTIL UPTIME primary active -n-cv SP 32 16000M 11% 10d 15h 59m SOFTSTATE Solaris running VCPU VID PID UTIL STRAND 0 0 31% 100% 1 1 12% 100% 2 2 4.3% 100% 3 3 2.8% 100% 4 4 22% 100% 5 5 3.7% 100% 6 6 3.0% 100% 7 7 5.2% 100% 8 8 29% 100% 9 9 9.9% 100% 10 10 3.5% 100% 11 11 3.1% 100% 12 12 21% 100% 13 13 4.0% 100% . 14 14 0.8% 100% 15 15 4.3% 100% 16 16 27% 100% 17 17 6.7% 100% 18 18 3.4% 100% 19 19 9.1% 100% 20 20 28% 100% 21 21 4.1% 100% 22 22 3.2% 100% 23 23 4.8% 100% 24 24 28% 100% 25 25 7.3% 100% 26 26 4.7% 100% 27 27 5.8% 100% 28 28 19% 100% 29 29 3.6% 100% 30 30 4.0% 100% 31 31 2.7% 100%
  • 36. 34 Running Oracle RAC on Sun Logical Domains Sun Microsystems, Inc. MAU ID CPUSET 0 (0, 1, 2, 3, 4, 5, 6, 7) 1 (8, 9, 10, 11, 12, 13, 14, 15) 2 (16, 17, 18, 19, 20, 21, 22, 23) 3 (24, 25, 26, 27, 28, 29, 30, 31) MEMORY RA PA SIZE 0xe000000 0xe000000 16000M VARIABLES boot-device=/pci@400/pci@0/pci@8/scsi@0/disk@0,0:a disk net keyboard-layout=US-English security-mode=none security-password= IO DEVICE PSEUDONYM OPTIONS pci@400 pci_0 pci@500 pci_1 VCC NAME PORT-RANGE primary-vcc0 5000-5100 VSW . NAME MAC NET-DEV DEVICE MODE primary-vsw0 00:14:4f:46:e9:5c nxge0 switch@0 primary-vsw1 00:14:4f:fa:61:af switch@1 VDS NAME VOLUME OPTIONS DEVICE primary-vds0 ldom1 /dev/rdsk/c3t0d1s2 ocr1 /dev/rdsk/c2t1d0s2 voting11 /dev/rdsk/c2t1d1s2 voting21 /dev/rdsk/c2t1d2s2 voting31 /dev/rdsk/c2t1d3s2 ASM1 /dev/rdsk/c2t1d4s2 VCONS NAME SERVICE PORT SP
  • 37. 35 Running Oracle RAC on Sun Logical Domains Sun Microsystems, Inc. Configuration of the first guest domain (ldom1) NAME STATE FLAGS CONS VCPU MEMORY UTIL UPTIME ldom1 active -n--- 5000 48 24G 15% 3h 58m SOFTSTATE Solaris running VCPU VID PID UTIL STRAND 0 32 9.7% 100% 1 33 1.4% 100% 2 34 0.8% 100% 3 35 0.5% 100% 4 36 2.4% 100% 5 37 0.6% 100% 6 38 0.4% 100% 7 39 2.4% 100% 8 40 7.7% 100% 9 41 2.3% 100% 10 42 0.6% 100% 11 43 1.0% 100% 12 44 3.0% 100% 13 45 0.5% 100% 14 46 0.0% 100% 15 47 0.9% 100% 16 48 6.0% 100% 17 49 0.9% 100% 18 50 0.6% 100% . 19 51 3.8% 100% 20 52 5.5% 100% 21 53 0.8% 100% 22 54 0.6% 100% 23 55 1.0% 100% 24 56 8.1% 100% 25 57 0.7% 100% 26 58 1.1% 100% 27 59 1.3% 100% 28 60 2.9% 100% 29 61 0.7% 100% 30 62 1.4% 100% 31 63 0.7% 100% 32 64 0.0% 100% 33 65 0.0% 100% 34 66 0.0% 100% 35 67 0.0% 100% 36 68 0.0% 100% 37 69 0.0% 100% 38 70 0.0% 100% 39 71 0.0% 100%
  • 38. 36 Running Oracle RAC on Sun Logical Domains Sun Microsystems, Inc. 40 72 0.0% 100% 41 73 0.0% 100% 42 74 0.0% 100% 43 75 0.0% 100% 44 76 0.0% 100% 45 77 0.0% 100% 46 78 0.0% 100% 47 79 0.0% 100% MAU ID CPUSET 4 (32, 33, 34, 35, 36, 37, 38, 39) 5 (40, 41, 42, 43, 44, 45, 46, 47) 6 (48, 49, 50, 51, 52, 53, 54, 55) 7 (56, 57, 58, 59, 60, 61, 62, 63) 8 (64, 65, 66, 67, 68, 69, 70, 71) 9 (72, 73, 74, 75, 76, 77, 78, 79) MEMORY RA PA SIZE 0x6000000 0x3f6000000 24G VARIABLES boot-device=/virtual-devices@100/channel-devices@200/disk@0:a vnet0 keyboard-layout=US-English NETWORK NAME SERVICE DEVICE MAC . vnet0 primary-vsw0@primary network@0 00:14:4f:f8:9c:50 vnet1 primary-vsw1@primary network@1 00:14:4f:f8:3b:d2 DISK NAME VOLUME TOUT DEVICE SERVER ldom1 ldom1@primary-vds0 disk@0 primary ocr1 ocr1@primary-vds0 disk@1 primary voting11 voting11@primary-vds0 disk@2 primary voting21 voting21@primary-vds0 disk@3 primary voting31 voting31@primary-vds0 disk@4 primary ASM1 ASM1@primary-vds0 disk@5 primary VCONS NAME SERVICE PORT ldom1 primary-vcc0@primary 5000
  • 39. 37 Running Oracle RAC on Sun Logical Domains Sun Microsystems, Inc. Configuration of the second control domain (rac02) NAME STATE FLAGS CONS VCPU MEMORY UTIL UPTIME primary active -n-cv SP 32 16000M 14% 1d 18h 43m SOFTSTATE Solaris running VCPU VID PID UTIL STRAND 0 0 0.0% 100% 1 1 0.0% 100% 2 2 0.0% 100% 3 3 0.0% 100% 4 4 0.0% 100% 5 5 0.0% 100% 6 6 0.0% 100% 7 7 0.0% 100% 8 8 0.0% 100% 9 9 0.0% 100% 10 10 0.0% 100% 11 11 0.0% 100% 12 12 0.0% 100% 13 13 0.0% 100% 14 14 0.0% 100% 15 15 0.0% 100% 16 16 0.0% 100% 17 17 0.0% 100% . 18 18 0.0% 100% 19 19 0.0% 100% 20 20 0.0% 100% 21 21 0.0% 100% 22 22 0.0% 100% 23 23 0.0% 100% 24 24 0.0% 100% 25 25 0.0% 100% 26 26 0.0% 100% 27 27 0.0% 100% 28 28 0.0% 100% 29 29 0.0% 100% 30 30 0.0% 100% 31 31 0.0% 100% MAU ID CPUSET 0 (0, 1, 2, 3, 4, 5, 6, 7) 1 (8, 9, 10, 11, 12, 13, 14, 15) 2 (16, 17, 18, 19, 20, 21, 22, 23) 3 (24, 25, 26, 27, 28, 29, 30, 31)
  • 40. 38 Running Oracle RAC on Sun Logical Domains Sun Microsystems, Inc. MEMORY RA PA SIZE 0xe000000 0xe000000 16000M VARIABLES boot-device=/pci@400/pci@0/pci@8/scsi@0/disk@0,0:a disk net keyboard-layout=US-English security-mode=none security-password= IO DEVICE PSEUDONYM OPTIONS pci@400 pci_0 pci@500 pci_1 VCC NAME PORT-RANGE primary-vcc0 5000-5100 VSW NAME MAC NET-DEV DEVICE MODE primary-vsw0 00:14:4f:46:e8:8a nxge0 switch@0 . primary-vsw1 00:14:4f:fa:d3:55 switch@1 VDS NAME VOLUME OPTIONS DEVICE primary-vds0 ldom2 /dev/rdsk/c3t0d2s2 ocr2 /dev/rdsk/c2t1d0s2 voting12 /dev/rdsk/c2t1d1s2 voting22 /dev/rdsk/c2t1d2s2 voting32 /dev/rdsk/c2t1d3s2 ASM2 /dev/rdsk/c2t1d4s2 VCONS NAME SERVICE PORT SP
  • 41. 39 Running Oracle RAC on Sun Logical Domains Sun Microsystems, Inc. Configuration of the second guest domain (ldom2) NAME STATE FLAGS CONS VCPU MEMORY UTIL UPTIME ldom2 active -n--- 5000 48 24G 15% 3h 50m SOFTSTATE Solaris running VCPU VID PID UTIL STRAND 0 32 41% 100% 1 33 14% 100% 2 34 6.8% 100% 3 35 16% 100% 4 36 35% 100% 5 37 7.1% 100% 6 38 6.8% 100% 7 39 8.2% 100% 8 40 40% 100% 9 41 13% 100% 10 42 6.8% 100% 11 43 7.0% 100% 12 44 27% 100% 13 45 4.8% 100% 14 46 6.2% 100% . 15 47 3.8% 100% 16 48 39% 100% 17 49 10.0% 100% 18 50 1.5% 100% 19 51 1.1% 100% 20 52 28% 100% 21 53 2.3% 100% 22 54 2.9% 100% 23 55 1.0% 100% 24 56 39% 100% 25 57 9.5% 100% 26 58 1.9% 100% 27 59 1.0% 100% 28 60 23% 100% 29 61 7.4% 100% 30 62 5.8% 100% 31 63 7.8% 100% 32 64 0.0% 100% 33 65 0.0% 100% 34 66 0.0% 100% 35 67 0.0% 100%
  • 42. 40 Running Oracle RAC on Sun Logical Domains Sun Microsystems, Inc. 36 68 0.0% 100% 37 69 0.0% 100% 38 70 0.0% 100% 39 71 0.0% 100% 40 72 0.0% 100% 41 73 0.0% 100% 42 74 0.0% 100% 43 75 0.0% 100% 44 76 0.0% 100% 45 77 0.0% 100% 46 78 0.0% 100% 47 79 0.0% 100% MAU ID CPUSET 4 (32, 33, 34, 35, 36, 37, 38, 39) 5 (40, 41, 42, 43, 44, 45, 46, 47) 6 (48, 49, 50, 51, 52, 53, 54, 55) 7 (56, 57, 58, 59, 60, 61, 62, 63) 8 (64, 65, 66, 67, 68, 69, 70, 71) 9 (72, 73, 74, 75, 76, 77, 78, 79) MEMORY RA PA SIZE 0x6000000 0x3f6000000 24G . VARIABLES keyboard-layout=US-English NETWORK NAME SERVICE DEVICE MAC vnet0 primary-vsw0@primary network@0 00:14:4f:f9:02:a7 vnet1 primary-vsw1@primary network@1 00:14:4f:f9:ef:3c DISK NAME VOLUME TOUT DEVICE SERVER ldom2 ldom2@primary-vds0 disk@0 primary ocr2 ocr2@primary-vds0 disk@1 primary voting12 voting12@primary-vds0 disk@2 primary voting22 voting22@primary-vds0 disk@3 primary voting32 voting32@primary-vds0 disk@4 primary ASM2 ASM2@primary-vds0 disk@5 primary VCONS NAME SERVICE PORT ldom2 primary-vcc0@primary 5000