Implementing an NDMP backup solution using EMC NetWorker on IBM Storwize V7000 Unified system

Implementing an NDMP backup solution
using EMC NetWorker on
IBM Storwize V7000 Unified system

A technical report

Mandar J. Vaidya

IBM Systems and Technology Group ISV Enablement
March 2012

© Copyright IBM Corporation, 2012

Table of contents
Abstract..................................................................................................................................... 1
Executive summary .................................................................................................................. 1
Intended audience ................................................................................................................................... 1
Scope ....................................................................................................................................................... 1
Prerequisites............................................................................................................................. 2
IBM Storwize V7000 Unified system overview ........................................................................ 2
Overview of IBM Storwize V7000 Unified system NDMP feature ........................................................... 4
Storwize V7000 Unified system NDMP supported physical configuration .............................................. 4
Two-way (or remote) NDMP configuration ........................................................................ 4
Three-way NDMP configuration ........................................................................................ 5
Fundamentals of Storwize V7000 Unified system NDMP feature ..................................... 6
Storwize V7000 Unified system NDMP command-line configuration ............................... 7
ISV lab Storwize V7000 Unified system configuration ...................................................... 7
Storwize V7000 Unified system NDMP network group configuration ............................... 8
Storwize V7000 Unified system NDMP node group configuration .................................... 8
NDMP node group configuration using GUI ...................................................................... 8
NDMP node group configuration using CLI ..................................................................... 12
Configuring Storwize V7000 Unified system NDMP backup prefetch............................. 13
Concurrent NDMP backup and restore usage with other file module Storwize V7000
Unified system functions ................................................................................................. 14
Considerations for EMC NetWorker DMA for Storwize V7000 Unified system NDMP
backup ............................................................................................................................. 15
Monitoring NDMP session on the Storwize V7000 Unified system ................................. 16
Monitoring NDMP log information on the Storwize V7000 Unified system ..................... 16
EMC NetWorker NDMP configuration ................................................................................... 17
IBM Storwize V7000 Unified system NDMP configuration on EMC NetWorker .................................... 17
Two-way tape library and device configuration using EMC NetWorker .......................... 17
Three-way tape server authentication and tape library configuration ............................. 19
Inventory of tape library and labeling of tapes ................................................................ 21
Creating NetWorker NDMP Backup Group ..................................................................... 24
Create and NDMP client .................................................................................................. 25
Configuring NDMP backup schedule .............................................................................. 28
IBM Storwize V7000 Unified system NDMP backup environmental variables ...................................... 29
Performing IBM Storwize V7000 Unified system NDMP backup using EMC NetWorker ..................... 30
Storwize V7000 Unified system NDMP backup using NetWorker CLI............................ 30
Storwize V7000 Unified system NDMP backup using the NetWorker Administration
interface ........................................................................................................................... 30
Performing IBM Storwize V7000 Unified system NDMP restore using EMC NetWorker ...................... 31
Storwize V7000 Unified system NDMP restore using NetWorker CLI ............................ 31
Storwize V7000 Unified system NDMP restore using NetWorker user interface ............ 31
Summary ................................................................................................................................. 33
Appendix A: Glossary ............................................................................................................ 34

Implementing an NDMP backup solution using EMC NetWorker on IBM Storwize V7000 Unified system

Appendix B: Materials used in the lab setup ........................................................................ 35
Appendix C: Resources ......................................................................................................... 36
About the author..................................................................................................................... 37
Trademarks and special notices ........................................................................................... 38


Abstract
This technical paper provides the best practices for implementing the IBM Storwize V7000
Unified system NDMP backup solution using EMC NetWorker. The IBM Storwize V7000 Unified
system includes the IBM Storwize V7000 file module and the Storwize V7000 storage system.
The IBM Storwize V7000 Unified system supports both block and file protocols.
Network Data Management Protocol (NDMP) is an open protocol for managing data stored on
networked servers. The NDMP future development is under the direction of the Storage
Networking Industry Association (SNIA), which has a work group for NDMP.

Executive summary
EMC NetWorker is a suite of enterprise-level data protection software that unifies and automates backup
to tape, disk-based, and flash-based storage media across physical and virtual environments for granular
and disaster recovery. EMC NetWorker also supports a wide range of data protection options including
NDMP support.

The IBM® Storwize® V7000 Unified system supports NDMP version 4. The NDMP function is configured
and managed on the Storwize V7000 Unified system using the Storwize V7000 Unified graphical user
interface (GUI) or command-line interface (CLI) from the active management node. NDMP alerts are
written to the alert log on the Storwize V7000 Unified active management node.
This technical report provides details on configuring the NDMP feature of IBM Storwize V7000 Unified
system and enabling EMC NetWorker NDMP-specific settings and functionality.

Intended audience
This technical report is intended for:
• Customers and prospects looking to implement effective NDMP backup solution on IBM Storwize
V7000 using the EMC NetWorker software
• Users and management seeking detailed information to implement NDMP backup solution on the
IBM Storwize V7000 Unified system using the EMC NetWorker software.

Scope
This technical report provides:
• Detailed NDMP backup solution implementation on the IBM Storwize V7000 Unified system with
EMC NetWorker
• Detailed NDMP backup implementation guide and configuration best practices
This technical report does not:
• Discuss any performance impact and analysis from a user perspective
• Replace any official manuals and documents from IBM and EMC NetWorker on the products used
in the NDMP backup solution

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Prerequisites
This technical paper assumes familiarity with the following prerequisites:
• Basic knowledge of the IBM Storwize V7000 Unified system
• Basic knowledge of EMC NetWorker
• Availability of the Storwize V7000 file module software version 1.3 GA or higher in the IBM
Storwize V7000 Unified system.

IBM Storwize V7000 Unified system overview
The IBM Storwize Unified system is a virtualized storage system (to complement virtualized server
environments) that provides unmatched performance, availability, advanced functions, and highly-scalable
capacity hardly seen in earlier midrange disk systems. This powerful midrange disk system has been
designed to be easy to use and enable rapid deployment without additional resources. The Storwize
V7000 Unified system consolidates block and file workloads into a single storage system for simplicity of
management and reduced cost, and offers greater efficiency and flexibility through built-in solid-state drive
(SSD) optimization and thin-provisioning technologies. The advanced functions of this storage system also
enable nondisruptive migration of data from existing storage, simplifying implementation and minimizing
impact to users. The Storwize V7000 Unified system enables you to virtualize and reuse existing disk
systems, supporting a greater potential return on investment (ROI). The system includes IBM Active Cloud
Engine™, which is designed to deliver policy-based management of files to reduce costs through use of
tiered storage and improve data governance.

The IBM Storwize V7000 Unified system includes two file modules and the IBM Storwize V7000 storage
system, and is designed to support both, file as well as block protocols. Figure 1 shows a pictorial
representation of the IBM Storwize V7000 Unified system. The file module is a clustered system
comprising two enclosures that provide file systems for use by network-attached storage (NAS). The file
module uses the Storwize V7000 storage system to provide the file module with volumes. Volumes are
also provided on the storage area network (SAN).

The Storwize V7000 storage system consists of a control enclosure that contains disk drives and two node
canisters that are managed as a single clustered system. Both, hard disk drives (HDDs) and SSDs are
supported. Expansion enclosures contain drives and are attached to the control enclosure. Expansion
canisters include the serial-attached SCSI (SAS) interface hardware that enables the node hardware to
use the drives of the expansion enclosures.

The IBM Storwize V7000 file module software within the Storwize V7000 Unified system contains the
interface node, storage node, and management node functions. A management node is used for
configuring, administering, and monitoring a system. An interface node connects a system to an Internet
Protocol (IP) network using following protocols.
• Common Internet File System (CIFS)
• Network File System (NFS)
• File Transfer Protocol (FTP)
• Hypertext Transfer Protocol Secure (HTTPS)
• Secure Copy Protocol (SCP)

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Figure 1: IBM Storwize V7000 Unified System

The Storwize V7000 Unified system supports the following block features and functions for attached host
systems:
• Creates a single pool of storage
• Provides logical unit virtualization
• Manages logical volumes
• Mirrors logical volumes
• Provides large cache
• Supports Copy Services

− IBM Tivoli® Storage FlashCopy® Manager (point-in-time copy) function, including
thin-provisioned FlashCopy to make multiple targets affordable
− Metro Mirror (synchronous copy)
− Global Mirror (asynchronous copy)
− Data migration

• Allows space management

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− IBM System Storage® Easy Tier™ to migrate the most frequently used data to
higher performing storage
− Metering of service quality when combined with IBM Tivoli Storage Productivity
Center
− Thin-provisioned logical volumes

• Provides external virtualization of existing disk systems

The Storwize V7000 Unified system provides an ability to manage block and file storage through a single
management graphical user interface (GUI) or CLI.

Overview of IBM Storwize V7000 Unified system NDMP feature
NDMP is a network-based protocol used by data management applications (DMA), primarily for backing
up and restoring the files contained within a NAS system. The file module of the Storwize V7000 Unified
system supports NDMP version 4.
The Storwize V7000 Unified system NDMP implementation provides the capability to back up and restore
the file systems of the Storwize V7000 Unified system. The granularity of backup is at the directory level.
NDMP supports the concept of a full backup and an incremental backup. A full backup copies all files and
directories specified to be backed by NDMP. An incremental backup copies the files that have changed
since the last successful incremental or full backup. In the event no previous backup has been finished, all
the files are backed up. Incremental backups occur automatically according to the scheduled criteria. A
complete restore requires the last full backup and all incremental backups that have occurred since the
last full backup.

Storwize V7000 Unified system NDMP supported physical configuration
There are two primary methods in which NDMP can be used as an interface with the Storwize V7000
Unified system.
• Two-way (or remote) NDMP
• Three-way NDMP
The following sections describe the two-way (or remote) and three-way NDMP configurations in detail.

Two-way (or remote) NDMP configuration
The two-way NDMP configuration consists of an external data management application, such as EMC
NetWorker, running on a server external to the Storwize V7000 Unified system. The data management
application has some form of storage hierarchy, such as a tape library or a tier 2 disk storage that it
manages for the storage of backup data.

In addition to the external data management application (EMC NetWorker), an Ethernet network
exists. This Ethernet network connects the data management application to the Storwize V7000
Unified system file modules on which the NDMP server is running. NDMP controls the information and
data traffic across the network between the external DMA and the Storwize V7000 Unified system file
modules on which the NDMP server is running.

The recommendation is to have a high-speed 10-Gb Ethernet network to handle the volume of data
being backed up or restored.

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Figure 2 shows an example of a two-way NDMP configuration. It includes an external data
management application (EMC NetWorker) running on a server external to the Storwize V7000 Unified
system. The data management application is connected to an 8-Gbps Fibre Channel (FC) SAN along
with an IBM System Storage® TS3200 tape library with some FC attached tape drives, such as IBM
Linear Tape-Open data cartridges, Generation 3, Generation 4, or Generation 5 tape drives. The data
management application is connected to a 10-Gbps Ethernet network to which the Storwize V7000
Unified system file modules are attached. In Figure 2, the lines are intended to show the type and
speed on the connections between the various physical components and do not necessarily represent
the actual number of physical links.

Figure 2: Two-way NDMP backup configuration

Three-way NDMP configuration
In a three-way NDMP implementation, an NDMP tape server is installed on a server external to the
Storwize V7000 Unified system and separate from the server on which the EMC NetWorker data
management application is running. Some form of storage devices, such as a virtual tape library or
real tape library and tape drives are attached to the server running the NDMP tape server.

The NDMP controls the traffic flows between the EMC NetWorker data management application and
the Storwize V7000 Unified system file modules. NDMP data traffic (the actual data being backed up
or restored) flows between the Storwize V7000 Unified system file modules and the NDMP tape
server. Therefore, it is recommended that the Ethernet network between the NDMP tape server and
the Storwize V7000 Unified system file modules running the NDMP server be a high-speed 10-Gbps
Ethernet network.

Figure 3 shows an example of an NDMP three-way configuration. In this example, the Storwize V7000
Unified system file modules used for NDMP backup and restore are on a 10-Gbps Ethernet network
along with the NDMP tape server. The server on which the NDMP tape server is running is connected

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to an 8-Gbps FC SAN along with an IBM System Storage TS3200 tape library with some FC attached
tape drives, such as IBM Linear Tape-Open data cartridges and Generation 3, Generation 4, or
Generation 5 tape drives.

Figure 3: Three-way NDMP backup configuration with DMA and NDMP tape server

Fundamentals of Storwize V7000 Unified system NDMP feature
The following points explain the fundamentals of Storwize V7000 Unified system NDMP features:
• An NDMP version 4 compliant data server is available on each file module of the Storwize
V7000 Unified system. There is a provision to configure a set of file modules that will be
part of an NDMP_NODE_GROUP. This set of file modules is paired with network group IP
addresses that can be assigned to a specific network port. This network port is associated
with the NDMP service.

• The NDMP server running on the file modules provides both data and control connections
to servers external to the Storwize V7000 Unified system on which a data management
appliance is running.

• The ability to configure the NDMP parameters for this set of file modules (the
NDMP_NODE_GROUP) is provided through the Storwize V7000 Unified system CLI
commands or GUI, storing the NDMP configuration parameters in the Samba Registry.

• In addition, the management operations to store and retrieve NDMP configuration
parameters, view NDMP session information and NDMP log information, and stop
currently running NDMP sessions can be performed through the Storwize V7000 Unified
system CLI or GUI.

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• An NDMP backup session provides backup of a specific directory in an IBM General
Parallel File System (IBM GPFS™) and all files and subdirectories contained within the file
module of the Storwize V7000 Unified system. Besides the basic data of the files and
directories, all extended GPFS attributes are saved for every file and directory. In order to
provide the provision to back up a directory structure at a given point in time, a snapshot is
used and it is actually the snapshot of the directory structure that is backed up. This
snapshot also accounts for files that might be open or in use during the backup, as a
point-in-time representation of the file is backed up by NDMP.

• An NDMP restore session restores all the files and directories in the proper structure of
subdirectories, and so on. In addition to the actual file contents, the GPFS extended
attributes are also restored.

Storwize V7000 Unified system NDMP command-line configuration
The following CLI commands (shown in Table 1) are available for configuring, monitoring, and
managing the NDMP configuration parameters and NDMP sessions.

# Storwize V7000 Unified CLI Usage description
commands
1 cfgndmp Configure NDMP

2 cfgndmpprefetch Configuring NDMP backup prefetch

3 lsndmp List NDMP configuration

List the actual contents of the NDMP log on the given file
4 lsndmplog
module

5 lsndmpsession List NDMP session information

Remove NDMP configuration information for a specified
6 rmndmpcfg
NDMP node group

7 stopndmpsession Stop NDMP session

8 lsndmpprefetch List NDMP prefetch configuration

Table 1: Storwize V7000 Unified system CLI command description

ISV lab Storwize V7000 Unified system configuration
In the ISV lab:
• The Storwize V7000 Unified system has one Storwize V7000 storage system for block
access functionality.
• The Storwize V7000 Unified system has two file modules for file-level access:
mgmt001st001 and mgmt002st001
• The Storwize V7000 Unified system file cluster is defined as: st001.vsofs1.com

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• There are 10-Gb Ethernet cards on each file modules and configured ethX1 to access the
bonded ports
(Refer to the “Appendix B: Materials used in the lab setup” section for more information.)

Storwize V7000 Unified system NDMP network group configuration
This section provides the guidelines to create and configure network group that includes all the file
modules that can service NDMP requests for the NDMP node group.
• Create a network group comprising file modules using the mknwgroup CLI command.

mknwgroup ndmp_nw_group mgmt001st001,mgmt002st001
Validate the network group using the lsnwgroup CLI command.

• Create a network with configurable IP addresses using the mknw CLI command.

mknw 17.0.0.0/24 0.0.0.0/0:17.0.0.1 --add 17.0.0.100,17.0.0.101,17.0.0.102,17.0.0.103
Note: Visit the URL: http://oav.net/mirrors/cidr.html to figure out the Classless Inter-Domain
Routing (CIDR). In this case, the team used 23. mknw 17.0.0.0/24…

Validate the newly created network using the lsnw CLI command.

• Attach the newly created network group, ndmp_nw_group, to the newly created network
using the attachnw CLI command.

attachnw 17.0.0.0/24 ethX1 -g ndmp_nw_group

Storwize V7000 Unified system NDMP node group configuration
This section provides appropriate guidelines to create and configure the NDMP node group. Either
GUI or CLI can be used to configure the NDMP node group.
• An NDMP configuration can be defined only for an NDMP node group.

• An NDMP node group need to be created before any other specific NDMP node group
configuration parameters can be set.

• An NDMP node group is created, configured, and activated appropriately, before an NDMP
backup or restore can be configured on the EMC NetWorker data management application
server.
Note: The NDMP configuration parameters of a single file module of the Storwize V7000
Unified system cannot be changed individually.

NDMP node group configuration using GUI
Perform the following steps to configure the NDMP node group using GUI:
1. Log in to the Storwize V7000 Unified system GUI using https://<Address>:1081
2. Click the File icon in the left-hand side and click Services to start configuring NDMP backup.

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Figure 4 : Storwize V7000 Unified system File Services administration

3. Select Backup Selection. Either Tivoli Storage Manager backup or NDMP backup can be
configured for the file module of the Storwize V7000 Unified system. Note that both Tivoli Storage
Manager and NDMP backup are not supported on the same Storwize V7000 Unified storage
system. (Refer to Note 1 of the “Concurrent NDMP backup and restore usage with other file
module Storwize V7000 Unified system functions” section.) Select Network Data Management
Protocol (NDMP) and click OK.

Figure 5 : Selection of NDMP as backup technology

4. Click New Backup NDMP to start NDMP configuration.

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Figure 6 : Configure new NDMP backup.

5. The New NDMP Node Group window is displayed. In the General tab, enter the NDMP node
group name. From the list, select a file system to be configured for taking the NDMP backup, and
select a network group from the corresponding list. After selecting the network group, network
group’s interface nodes and network group’s public IP addresses are displayed in the window.

Note: Network group’s interface nodes refer to the file modules of the Storwize V7000 Unified
system.

Figure 7 : General parameters for NDMP configuration

6. In the Advanced tab, select the advanced options for NDMP configuration. Data-transfer port
range must be specified. You might choose to keep default options. Activate the prefetch
functionality by selecting the Prefetch Activated check box and click OK. Refer to the
“Configuring Storwize V7000 Unified system NDMP backup prefetch” section before activating
prefetch.

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Figure 8 : Advanced parameters for NDMP configuration

7. The wizard configures the NDMP node group and the summary is displayed. Verify the summary
information and click Close.

Figure 9 : NDMP configuration and summary

8. The newly created NDMP configuration will be displayed in the main window. From the Actions
list, select Activate to activate NDMP configuration.

Figure 10 : NDMP configuration activation

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9. The wizard then activates the NDMP configuration and the summary is displayed. Verify the
summary information and click Close.

Figure 11 : NDMP configuration activation summary

NDMP node group configuration using CLI
Perform the following steps to configure an NDMP node group using CLI.

1. Create an NDMP node group using the --create option of the cfgndmp command.
cfgndmp -c st001.vsofs1.com IFS2_NDMP_GRP --create

2. Attach the newly configured network group, ndmp_nw_group; refer to the “Storwize V7000
Unified system NDMP network group configuration” section to the newly created NDMP node
group using the cfgndmp CLI command with the --networkGroup option.

cfgndmp -c st001.vsofs1.com IFS2_NDMP_GRP --networkGroup ndmp_nw_group

3. Set the data port range of the NDMP node group using the --dataTransferPortRange option of
the cfgndmp command.
cfgndmp -c st001.vsofs1.com IFS2_NDMP_GRP --dataTransferPortRange 2048-2098

4. Add the file system mount point paths to the NDMP node group configuration using the
-addPaths option of the cfgndmp command.
cfgndmp -c st001.vsofs1.com IFS2_NDMP_GRP --addPaths
/ibm/gpfs1,/ibm/gpfs2,/ibm/gpfs3

5. A default NDMP backup prefetch configuration is assigned to the newly created NDMP node
group, with the function deactivated. Optionally, use the cfgndmpprefetch CLI command to
change the NDMP backup prefetch configuration and activate the function for improved NDMP
backup performance. Refer to the “Configuring Storwize V7000 Unified system NDMP backup
prefetch” section for more information.
6. Activate the NDMP node group with the --activate option of the cfgndmp CLI command.
cfgndmp -c st001.vsofs1.com IFS2_NDMP_GRP --activate

Note: You can use the lsndmp CLI command with the -ndmpServiceStatus option to verify that
NDMP has started on all of the nodes in the NDMP node group.

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Configuring Storwize V7000 Unified system NDMP backup prefetch
The NDMP backup prefetch function navigates the directory that is being backed up, reading files
in advance to the files actually coming due to be backed up. The prefetch function opens files in
read-only mode and places the files in the file module’s cache for improved backup performance.
The NDMP backup prefetch function is designed to work on files that are less than or equal to
1 MB in size.

Restriction: The NDMP backup prefetch function does not work for a file system that has a block
size greater than 1 MB.

• To activate the NDMP backup prefetch function, use the cfgndmpprefetch CLI command
with the --activate option. Specify the NDMP node group to enable the NDMP prefetch
function with the NDMP node group.

cfgndmpprefetch -c st001.vsofs1.com IFS2_NDMP_GRP --activate

Note: If NDMP is not active on the specified NDMP node group, a message is displayed
indicating that the prefetch function for NDMP will be activated when NDMP is activated.

• To set a limit on the number of applications that can work simultaneously, use NDMP
backup prefetch for a node (including multiple instances of the same program such as
multiple NDMP sessions) and use the cfgndmpprefetch CLI command with the
--applimit option.
cfgndmpprefetch –c st001.vsofs1.com IFS2_NDMP_GRP --applimit 4
Note: If NDMP is not active on the specified NDMP node group, a message is displayed
indicating that the configuration for the prefetch function for NDMP has been updated.

• To set a limit on the number of prefetching threads per file module, use the
cfgndmpprefetch CLI command with the --numThreads option.
cfgndmpprefetch –c st001.vsofs1.com ndmp_node_grp1 --numThreads 100
Note: The value for the --numThreads option must be a positive integer greater than 50
and less than or equal to 180. The default value is 100.

• To display the NDMP backup prefetch status information, use the lsndmpprefetch CLI
command using the -s or --status option, and optionally adding the -g option to limit
display to the specified NDMP node group. This command shows the current and default
settings for prefetch.
lsndmpprefetch –c st001.vsofs1.com –g IFS2_NDMP_GRP –s

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Concurrent NDMP backup and restore usage with other file module Storwize V7000
Unified system functions
The information in Table 2 helps you identify the Storwize V7000 Unified system features and
functions that might be currently used on the same file modules of the Storwize V7000 Unified system.
NDMP IBM Tivoli Hierarchical Anti-virus Asynchronous Storwize
Features backup Storage storage scanning replication V7000
and and Manager management Unified
functions restore backup and (HSM) block
restore processing functions
Same
Same system:
system: No Same system: Yes Same system:
Same file No Same file Yes
NDMP backup module: No Same file module: Same file
and restore N/A Refer Note 1 module: No Yes module: Yes Yes
Same
system:
No
Same Same
file system:
Tivoli Storage module: Same system: Yes Same system:
Manager No Yes Same file Yes
backup and Refer Same file module: Same file
restore Note 1 N/A module: Yes Yes module: Yes Yes
Same
Same system:
system: Yes
No Same file Same system:
Same Same module: Yes
file system: Yes Yes Same file
HSM module: Same file Refer module: Yes
processing No module: Yes N/A Note 3 Refer Note 2 Yes
Same
system:
Yes Same system:
Same Same Yes Same system:
file system: Yes Same file Yes
Anti-virus module: Same file module: Yes Same file
scanning Yes module: Yes Refer Note 3 N/A module: Yes Yes
Same
system: Same
Yes Same system: system:
Same Same Yes Yes
file system: Yes Same file Same file
Asynchronous module: Same file module: Yes module:
replication Yes module: Yes Refer Note 2 Yes N/A Yes
Storwize
V7000 Unified
block
functions Yes Yes Yes Yes Yes N/A
Table 2: Concurrent NDMP backup and restore usage with other Storwize V7000 Unified system functions

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Notes:
1. IBM Tivoli Storage Manager backup / restore and NDMP backup / restore provide the same basic
functionality of backing up or restoring file systems and the directories and files within the file
systems. It is not recommended and not supported to have both Tivoli Storage Manager backup
restore processing and NDMP backup restore processing being used on the same Storwize
V7000 unified system for file modules.

2. NDMP backups are normally scheduled operations, which can be scheduled at a time when other
activity, such as general purpose file serving, is low. If possible, it is recommended performing
NDMP backup during periods when other file serving activity is generally lower, perhaps late in the
evening or early in the mornings.

3. NDMP backup or restore processing significantly interferes with other Storwize V7000 Unified
system file access functions, such as network file serving (CIFS, NFS, FTP, and HTTP). Many file
module functions invoke the GPFS policy engine to evaluate a GPFS policy to determine the list of
files to operate on. These include:

• Tivoli Storage Manager backup processing
• Tivoli Storage Manager HSM processing
• NDMP incremental backup processing
• Asynchronous replication processing
• The runpolicy CLI command and others

The GPFS policy engine scans the file system metadata to determine the files that match the criteria
specified in the policy. This scan of the file system metadata can generate a significant amount of I/O
to the storage systems to read all the file system metadata, especially for file systems containing very
large number of files. Therefore, it is recommended not to start all the Storwize V7000 Unified
functions at exactly the same time, but instead these functions be staggered over time.

Considerations for EMC NetWorker DMA for Storwize V7000 Unified system NDMP
backup
You need to take care of the following considerations for EMC NetWorker DMA for NDMP backup.
1. Obtain either the IP address or host name to be used for this NDMP session.
− Host name: Configure a DNS server with a common host name mapped to all of the
IP addresses that are associated with the network group that in turn is associated
with the NDMP node group. If this hostname is used, any of the file modules that are
associated with the NDMP node group can be assigned based on a round robin IP
address assignment from the DNS server.
− IP address: Submit the lsnwinterface CLI command using the -x option on the
active management file module and choose an IP address or multiple IP addresses if
multiple backup policies are to be run simultaneously. This method is useful when
multiple NDMP backup policies are used and you want to distribute the NDMP
workload across multiple file modules and ensure that the same file module will not
be used for all of the backup policies that will be run from the data management
application server.

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2. Configure the EMC NetWorker data management application server with the configuration
parameters of the NDMP server for the file modules that are available to perform NDMP
services, including the username and password associated with the NDMP node group. If
a port other than 10000 was selected for the NDMP control port, then that control port's
information needs to be configured on the data management application server.

Monitoring NDMP session on the Storwize V7000 Unified system
Note: Read this information after configuring EMC NetWorker NDMP configuration and staging
appropriate NDMP backup or restore. Refer to the “EMC NetWorker NDMP configuration” section for
more information.
• The lsndmpsession CLI command enables to monitor the NDMP sessions on Storwize V7000
Unified system. Use the -n or -nodes option to view NDMP sessions running on specified file
module or with the -g or --nodeGroupName option to view NDMP sessions running on specified
NDMP node groups.
Only file modules can be specified when using the -n or --nodes option. Multiple file modules and
multiple node groups in a list must be separated with commas. If no file module or node groups
are specified, the output displays information for both the file modules in the cluster. To determine
the file modules that are running NDMP sessions for an NDMP node group, submit the following
command to display the file modules that have NDMP sessions running and the sessions that are
running on the file modules.
lsndmpsession –c st001.vsofs1.com -n mgmt001st001

Or

lsndmpsession –c st001.vsofs1.com –g IFS2_NDMP_GRP

• Use the CLI lsndmpsession command with the -i or --sessionID option to view the verbose
information of the NDMP session identified by the specified session ID running on the specified file
module.

lsndmpsession –c st001.vsofs1.com -n mgmt001st001 -i 1284990

Monitoring NDMP log information on the Storwize V7000 Unified system
You can view NDMP log using the lsndmplog CLI command.
• Use the CLI lsndmplog command with the -n or --nodes option to view all the NDMP log
information related to the specified file module. In the following example, the file module
mgmt001st001 is specified:

lsndmplog -c st001.vsofs1.com -n mgmt001st001

• Use the CLI lsndmplog command with the -l or --lines option to view the most recent lines of the
NDMP log information related to the specified file module. In the following example, the file
module mgmt001st001 and 25 lines are specified:

lsndmplog -c st001.vsofs1.com -n mgmt001st001 -l 25

16

• Use the CLI lsndmplog command with the -o or --outputLogFilePath option to save the log file
as a temporary file, as in the following example:

lsndmplog -c st001.vsofs1.com -n mgmt001st001 -o /ibm/gpfs0/ndmplog.out

Note: outputLogFilePath must be part of a currently configured export.

EMC NetWorker NDMP configuration
The EMC NetWorker enables you to use NDMP to initiate and control backups and restores of NAS
systems.

The NetWorker NDMP feature is an optional feature and must be licensed separately from the NetWorker
base product according to a tiered licensing structure. Refer to www.emc.com for more details about
licensing.

The NetWorker NDMP interface connects to hosts that have an active NDMP service or an NDMP data
module installed. NDMP allows IBM Storwize V7000 Unified system to back up data to other NDMP-
controlled devices in network. NDMP passes control of data and file metadata to and from the NetWorker
program.

IBM Storwize V7000 Unified system NDMP configuration on EMC NetWorker
NetWorker uses both administrative interface and the CLI to manage EMC NetWorker operations. Before
configuring NetWorker server for NDMP operations, refer to the NetWorker user guide and administration
guide at www.emc.com for the requirements and limitations of NetWorker data management application
server.

Before the tape library can be configured on the NetWorker server for NDMP backup and recovery
operations, obtain the information about the path name of media device. You can use the NetWorker
utility, inquire, to obtain device path names. Later, tape libraries can be configured through administrative
interface or the command line utility, jbconfig.

Two-way tape library and device configuration using EMC NetWorker
Perform the following steps for two-way NDMP tape library configuration on EMC NetWorker.

1. Login with root user or user with Microsoft® Windows® administrative privileges.
2. Configure the tape library using NetWorker jbconfig command line utility or use NetWorker
server’s Administration interface.
3. In the NetWorker Administration interface, click Devices to configure the storage device.

17

Figure 12 : Tape library configuration using EMC NetWorker Administration interface

4. Right-click the storage node on which the library needs to be configured and select Configure All
Libraries. It will open the Configure All Libraries wizard. Select the necessary options to specify
the library type, enable the new device, and set the server sharing policy for the library
configuration and click Next.

Figure 13 : Configure All Libraries wizard

5. Select the existing storage node, update the default options if required, and click Start
Configuration to begin with the configuration of the tape library.

18

Figure 14: Configure All Libraries wizard for configuring storage node

6. Click Finish to close the configuration wizard.

Figure 15: Configure All Library wizard configuration confirmation
Tape Library is configured and is now ready to use.

Three-way tape server authentication and tape library configuration
Perform the following steps for three-way NDMP tape server authentication and tape library
configuration.
1. Log in with root user or user with Windows administrative privileges.
2. Configure the tape library using NetWorker jbconfig command line utility or use NetWorker
server’s Administration interface.
3. In the NetWorker server Administration interface, click Devices to configure the storage device.

19

4. Click Configure All Libraries to start tape library configuration which is attached to a NDMP tape
server. It will open the Configure All Libraries wizard. Select the necessary options to specify the
library type, enable the new device, and set the server sharing policy for the library configuration
and click Next.

Figure 16 : Configure tape library for a three-way NDMP backup configuration

Figure 17: Configure All Libraries wizard for a three-way configuration

5. Enter the tape server details with Library Configuration Type set to ndmp. Provide the NDMP
user name and NDMP password for the tape server and click Start Configuration.

20

Figure 18: Configure All Libraries wizard for tape server details and authentication
6. Click Finish to complete the configuration wizard.

Figure 19: Configure All Libraries wizard for a three-way configuration confirmation
Tape library is configured and is now ready to use.

Inventory of tape library and labeling of tapes
After configuring the tape library, tapes inside the library needs to be inventoried, labeled, and added
to the storage pool. This section provides the steps involved in inventorying the tape library from the
NetWorker Administration interface.
1. On the NetWorker Administration interface, click Devices. Right-click the tape library configured
and click Inventory to start inventorying of tapes inside the tape library.

21

Figure 20 : Inventory of tapes

2. In the Inventory Library dialog box, enter the slot list and devices to use for inventory of tapes and
click OK.

Figure 21: Inventory Library dialog box

3. After the tapes are inventoried, right-click the configured tape library and click Label to start
labeling the tapes.

22

Figure 22: Label tapes

4. On the Label Library Media dialog box, enter the slot list, devices to use, and the target media
pool. Click OK to start labeling the tapes.

Figure 23: Label Library Media dialog box

23

Creating NetWorker NDMP Backup Group
NetWorker NDMP backup groups are created to scheule backups of NDMP clients.
1. To create NDMP backup groups, in the NetWorker Administration interface, click Configuration.
2. Right-click Groups and click New to create a new backup group.
3. In the Create Group dialog box, in the Setup tab, enter the group name and comments. If you
want to schedule backup during creation of group, enable Autostart and enter the appropriate
start time.

Figure 24 : Create group dialogue box

4. In the Advanced tab, enter the appropriate details to complete configuration of the group and click
OK. Refer to the EMC NetWorker administrative guide for additional details about group
configuration options.

24

Figure 25: Create Group advanced configuration settings

Create and NDMP client

To create an NDMP client, you need to perform the following configuration steps.
1. On the NetWorker Administration interface, click Configuration.
2. Right-click Clients and click New to start configuring a new NDMP client.

Figure 26 : Configuring an NDMP client

3. In the Create Client configuration dialog box, in the General tab, enter the client identity name,
save set information, and the group to which the client belongs to. Refer to the EMC NetWorker
administration guide for more information on the other attributes that can be specified.

25

Figure 27: Create Client – general configuration

4. On the Apps & Modules tab, enter the NDMP access information for the Storwize V7000 Unified
system NDMP remote user and password. Enter the NetWorker backup command as
nsrndmp_save.
• For a two-way Storwize V7000 Unified system NDMP backup to non-NDMP device, use the
–M option with the backup command.
nsrndmp_save –s server –c client –M –T backup_type
• For a three-way Storwize V7000 Unified system NDMP backup to tape server (NDMP device),
the backup command is
nsrndmp_save –T backup_type

IBM Storwize V7000 Unified system file modules NDMP backup supports backup_type as dump.

Enter the values in the Application information field as per NDMP environment variables. Refer
to EMC NetWorker administration guide for the description of various NetWorker NDMP
environmental variables. For Storwize V7000 Unified system related NDMP environmental
variables, refer to the “IBM Storwize V7000 Unified system NDMP backup environmental
variables” section.
Note: Direct access recovery (DAR) is an optimized data recovery operation that allows data to be
recovered in the middle of a tape without the need to parse the tape set sequentially. This
significantly reduces the recovery time of large backups. Use DIRECT=y as environmental
variable for NDMP backups to make use of the DAR functionality.

26

Figure 28: Options in the Apps & Modules tab

5. On the Globals (2 of 2) tab, specify the appropriate attributes for the storage nodes depending on
the type of NDMP backup that is performed.
• For a two-way Storwize V7000 Unified system NDMP backup, enter the server name where
tape library is attached first.
• For a three-way Storwize V7000 Unified system NDMP backup, enter the destination server
for the data being backed up first.

Figure 29: Options in the Globals (2 of 2) tab

6. Enter any other appropriate attributes to complete NetWorker client configuration and click OK to
configure an NDMP client.

27

Configuring NDMP backup schedule
The NetWorker software does not support incremental backup settings for NDMP backups. If
incremental setting is selected, the NetWorker server performs a full backup. However, level backups
can be scheduled to behave similar to incremental backups. For example, a weekly backup schedule
of full on every Sunday and incremental on the remaining days of the week is the same as a weekly
backup schedule of full on every Sunday and level 1 on Monday, level 2 on Tuesday, and so on.

Perform the following steps to create an NDMP backup schedule using the NetWorker Administration
interface.
1. In the Configuration section, right-click Schedules and click New to create a new Storwize
V7000 Unified system NDMP backup schedule.
2. In the Create Schedule dialog box, enter the schedule name, set the appropriate full and level
backups schedule, and click OK to create the NDMP backup schedule.

Figure 30 : Create Schedule dialog box

28

IBM Storwize V7000 Unified system NDMP backup environmental variables
This section illustrates Storwize V7000 Unified system NDMP backup environmental variables details and
how to configure environmental variables for the NetWorker client.

There are specific Storwize V7000 Unified system NDMP environment variables that are treated as
parameters and can be passed to the NDMP server from data management applications performing
NDMP backups. The following two parameters can be configured through data management applications.
• BACKUP_GROUP_NAME: This is the name of a backup group where all the backup
directories within the backup group share the same Storwize V7000 Unified system snapshot.

− Note 1: The way to set this environment variable is to have a line similar to
the following in the application information of NDMP client:
BACKUP_GROUP_NAME=NDMP_group

− Note 2: If the BACKUP_GROUP_NAME begins with NDMP_EXISTING then it is
assumed that the Storwize V7000 Unified system is configured to use a snapshot,
which has a name corresponding to this environment variable value. In this
special case, it is also assumed that the user will delete the corresponding
snapshot manually.

− Note 3: The maximum length of the backup group name is 32 characters
(inclusive of a possible NDMP_EXISTING).

• BACKUP_GROUP_EXPIRATION: This parameter helps to configure the amount of valid time
that the snapshot is associated with BACKUP_GROUP_NAME. After the age of the snapshot
has surpassed the expiration value, a new snapshot will be taken and all new NDMP backup
sessions associated with BACKUP_GROUP_NAME will use the new snapshot. This Storwize
V7000 Unified system NDMP parameter is very important to effectively schedule level
backups that have less than 1 hour level backup expiration schedule time.

− Note 1: The way to set this environment variables is to have a line similar to the
following line in the Application information of NDMP client:
BACKUP_GROUP_EXPIRATION = 1_DAY

Note 2: The following values are acceptable for this environment variable:
• 0_SEC … 60_SEC
• 0_MIN … 60_MIN
• 0_HOUR … 168_HOUR
• 0_ DAY … 31_DAY
• 0_MONTH … 12_MONTH

− Note 3: If no value is given for the expiration, the default will be 1 hour.

− Note 4: If the user wants to ensure that a separate snapshot is taken for every
directory, then an expiration value of 0_SEC need to be specified.

29

Performing IBM Storwize V7000 Unified system NDMP backup using EMC
NetWorker
You can perform Storwize V7000 Unified system NDMP backup using NetWorker CLI or NetWorker
Administration interface.

Before performing NDMP backups, ensure that the following configuration has been performed.
1. Enable the NDMP connection between NetWorker server and IBM Storwize V7000 Unified
system.
2. Add the Storwize V7000 Unified system NDMP client to the NDMP backup group.
3. Select a NDMP backup schedule with appropriate browse and retention policies.
4. Load the tapes into the tape library and label them appropriately.

Storwize V7000 Unified system NDMP backup using NetWorker CLI
Perform the NDMP backup using following command. This performs level 0 (full) backup of the group,
2way-ndmp.

savegrp –l 0 2way-ndmp

Storwize V7000 Unified system NDMP backup using the NetWorker Administration
interface
NetWorker Administration interface can be used to start NDMP backup.
1. In the Monitoring tab of the administrative interface, right-click the NDMP backup group and click
Start to start NDMP backup.

Figure 31: Starting NDMP backup using administrative interface

2. Monitor the running backups for its status in the Monitoring sections.

30

Performing IBM Storwize V7000 Unified system NDMP restore using EMC
NetWorker
You can perform Storwize V7000 Unified system NDMP save set and directory-level restores using
NetWorker CLI or NetWorker user interface. For NDMP file-by-file restores, you can use NetWorker user
interface or NetWorker command line utility, recover.

Storwize V7000 Unified system NDMP restore using NetWorker CLI
• At the command line, run the following command to perform a full save set recovery:

nsrndmp_recover -c client -S savesetid
• At the command line, run the following command to perform a directory-level save set recovery:

nsrndmp_recover -c client -m <destination_directory> -S savesetid -v on <backedup_directory>
• To perform file-by-file recovery, run the following NetWorker command-line utility:
recover –c client –s server
− Type the directory to browse.
− Use the subcommand, add filename/filenames, to add files to recover.
− In case, files need to be recovered to another directory use the relocate option.
− Enter recover to start recovery of selected files.

Refer to the NetWorker command-line user guide and administrative guide for additional
command-line operation options.

Storwize V7000 Unified system NDMP restore using NetWorker user interface
NetWorker user interface can be used to perform NDMP restores. To do so:
1. Launch the NetWorker user interface.
2. Click Operations  Save Set Recover.

Figure 32 : NDMP restore using NetWorker user interface
3. Select the save set that needs to be recovered.

31

Figure 33: NDMP restore – save set selection

4. If required, click Recover Options to specify the alternate directory where you need to relocate
the files.

Figure 34: NDMP restore – relocation of files

5. Select other available recover options, if required, and click OK to recover the NDMP backup.
6. Verify the recovery logs after the restoration is complete.

For further recovery options, refer to EMC NetWorker administration guide.

32

Summary
IBM Storwize V7000 Unified is a powerful storage system that combines server and storage components
to provide a single point of control for file and block data storage. By enabling virtualization, consolidation,
and tiering in mid-sized organizations, it is designed to improve application availability and resource
utilization. The system offers easy-to-use, efficient, and cost-effective management capabilities for both
new and existing storage resources in your IT infrastructure and thus addresses the new storage
challenges posed by continuing explosion of data.

Storwize V7000 Unified system combines IBM servers running advanced network-attached storage
software, and Storwize V7000 controllers with advanced block storage capabilities, providing thin
provisioning, automated tiering, storage virtualization, clustering, replication, multiprotocol support, and a
next-generation easy-to-use GUI. Single management interface to manage both block and file storage
simplifies administration and provides more flexibility and less complexity. It allows organizations to
increase capacity without adding complexity (which can translate into reduced TCO, reduced capital
expenditure, and enhanced operational efficiency). Together, these technologies are designed to enable
the Storwize V7000 Unified system to deliver extraordinary levels of storage efficiency for both
unstructured file data and block data storage needs.

Storwize V7000 Unified system has incorporated the NDMP technology and supports the NDMP protocol
version 4. Leveraging EMC NetWorker NDMP backup support, file data residing on the Storwize V7000
Unified system can be seamlessly backed up to the EMC NetWorker supported storage device and
restored from it.
This technical content is intended to be a reference guide for users who want to use EMC NetWorker for
backing up files (using the NDMP protocol) that are created on the file modules of the Storwize V7000
Unified system. It is not meant to be an implementation or solution guide. For details on the actual
implementation or solution design, refer to the documentation provided in the “Appendix C: Resources”
section of this technical paper.

33

Appendix A: Glossary
IBM Storwize V7000 Unified system – Built on IBM high-performance computing experience, and
designed to support both block and file storage protocols, Storwize V7000 Unified system provides
performance, high availability, single-management interface, and functionality that are essential to address
strategic storage requirements.

Network Data Management Protocol (NDMP) – An industry-standard protocol created to ease the
process of integrating backup and restore for NAS with data protection software, such as EMC NetWorker.
The NDMP is the data transfer protocol and one piece of the overall data protection solution. For more
information about the NDMP protocol and the NDMP standards group visit the URL:
http://www.ndmp.org/info/faq.shtml

Two-way (or remote) NDMP – An NDMP configuration supported by the Storwize V7000 Unified system.
The two-way NDMP configuration consists of an external data management application, such as EMC
NetWorker, running on a server external to the Storwize V7000 Unified system. The data management
application has some form of storage hierarchy (such as a tape library) that it manages for the storage of
backup data.

Three-way NDMP – An NDMP configuration supported by the Storwize V7000 Unified system. In a three-
way NDMP configuration, an NDMP tape server is installed on a server external to the Storwize V7000
Unified system and separate from the system where EMC NetWorker data management application is
running.

EMC NetWorker – An NDMP data management application used to back up the Storwize V7000 Unified
system data, using Storwize V7000 Unified system NDMP technology.

Direct access recovery (DAR) – EMC NetWorker uses DAR to restore a directory or individual files from
a backup image. DAR can greatly reduce the time taken to restore files and directories.

34

Appendix B: Materials used in the lab setup
Infrastructure
Vendor Quantity Details
component

Data management IBM 1 IBM x3650 M3
application server

Storage IBM IBM Storwize V7000 Unified system

Storwize V7000 Unified File Modules – 2
Storwize V7000 Storage system – 1

Network adapter Broadcom 2 Broadcom NetXtreme II BCM 5709 1000Base-T
(file modules)

Network adapter Broadcom 2 Broadcom NetXtreme II BCM 5709 1000Base-T
(data management
application server)

Switch (data IBM 1 IBM Switch Model 2498-B24
management
For more information, refer to IBM System
application server
Storage SAN24B-4 Express Switch at
back-end SAN)
ibm.com/systems/storage/san/b-type/san24b-
4/express/specifications.html

Host bus adapter QLogic 2 QLogic QLA 2432
(HBA)

Tape library IBM 2 IBM TS3200 Tape Library Express Model
For more information, visit:
ibm.com/systems/storage/tape/ts3200/index.html

IBM Storwize V7000 Unified system NDMP version 4
Software

EMC NetWorker EMC NetWorker version 7.6.3

Table 3 : Materials used in the lab setup

35

Appendix C: Resources
The following websites provide useful references to supplement the information contained in this paper:
• IBM Systems on IBM PartnerWorld®
ibm.com/partnerworld/systems

• IBM Redbooks®
ibm.com/redbooks

• IBM Publications Center
www.elink.ibmlink.ibm.com/public/applications/publications/cgibin/pbi.cgi?CTY=US

IBM Storwize V7000 Unified system documentation
• IBM Storwize V7000 Unified system Information Center
http://publib.boulder.ibm.com/infocenter/storwize/unified_ic/index.jsp

IBM Scale Out Network Attached Storage (SONAS) documentation
• IBM SONAS Information Center
http://publib.boulder.ibm.com/infocenter/sonasic/sonas1ic/index.jsp

EMC NetWorker 7.6.3 documentation
• EMC NetWorker 7.6 SP3 Installation Guide
https://powerlink.emc.com/nsepn/webapps/btg548664833igtcuup4826/km/live1/en_US/Off
ering_Technical/Technical_Documentation/300-013-
331.pdf?mtcs=ZXZlbnRUeXBlPUttQ2xpY2tDb250ZW50RXZlbnQsZG9jdW1lbnRJZD0wO
TAxNDA2NjgwNjFlNmI1LGRvY3VtZW50VHlwZT1wZGYsbmF2ZU5vZGU9MGIwMTQwNj
Y4MDQ5MDk4Y19Hcmlk
• EMC NetWorker 7.6 SP3 Administration Guide
https://powerlink.emc.com/nsepn/webapps/btg548664833igtcuup4826/km/live1/en_US/Off
ering_Technical/Technical_Documentation/300-013-
301.pdf?mtcs=ZXZlbnRUeXBlPUttQ2xpY2tDb250ZW50RXZlbnQsZG9jdW1lbnRJZD0wO
TAxNDA2NjgwNjJlNDllLGRvY3VtZW50VHlwZT1wZGYsbmF2ZU5vZGU9MGIwMTQwNjY
4MDQ5MDk4Y19Hcmlk

36

About the author
Mandar Vaidya is a Senior Staff Software Engineer in IBM Systems and Technology (ISV Enablement)
Group. He has several years of experience working with various storage and systems technologies and
developing best practices on various storage solutions. Mandar holds a Bachelor degree in Engineering
from the University of Pune, India.
You can reach Mandar at mandar.vaidya@in.ibm.com.

37

Trademarks and special notices
© Copyright IBM Corporation 2012.
References in this document to IBM products or services do not imply that IBM intends to make them
available in every country.

IBM, the IBM logo, and ibm.com are trademarks or registered trademarks of International Business
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terms are marked on their first occurrence in this information with a trademark symbol (® or ™), these
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was published. Such trademarks may also be registered or common law trademarks in other countries. A
current list of IBM trademarks is available on the Web at "Copyright and trademark information" at
www.ibm.com/legal/copytrade.shtml.
Java and all Java-based trademarks and logos are trademarks or registered trademarks of Oracle and/or
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Microsoft, Windows, Windows NT, and the Windows logo are trademarks of Microsoft Corporation in the
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Other company, product, or service names may be trademarks or service marks of others.

Information is provided "AS IS" without warranty of any kind.
All customer examples described are presented as illustrations of how those customers have used IBM
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characteristics may vary by customer.
Information concerning non-IBM products was obtained from a supplier of these products, published
announcement material, or other publicly available sources and does not constitute an endorsement of
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All statements regarding IBM future direction and intent are subject to change or withdrawal without notice,
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38

any future products. Such commitments are only made in IBM product announcements. The information is
presented here to communicate IBM's current investment and development activities as a good faith effort
to help with our customers' future planning.

Performance is based on measurements and projections using standard IBM benchmarks in a controlled
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39

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