Xen Euro Par07

Virtualizing the Data Center with Xen Steve Hand University of Cambridge and XenSource

What is Xen Anyway? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Problem: Success of Scale-out ,[object Object],[object Object],[object Object],[object Object],[object Object]

Solution: Virtualize With Xen ,[object Object],[object Object],[object Object],[object Object],

Further Virtualization Benefits ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Virtualization Possibilities ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

This talk ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Xen 3.0 (5th Dec 2005) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Xen 3.x Architecture Event Channel Virtual MMU Virtual CPU Control IF Hardware (SMP, MMU, physical memory, Ethernet, SCSI/IDE) Native Device Drivers GuestOS (XenLinux) Device Manager & Control s/w VM0 GuestOS (XenLinux) Unmodified User Software VM1 Front-End Device Drivers GuestOS (XenLinux) Unmodified User Software VM2 Front-End Device Drivers Unmodified GuestOS (WinXP)) Unmodified User Software VM3 Safe HW IF Xen Virtual Machine Monitor Back-End HVM x86_32 x86_64 IA64 AGP ACPI PCI SMP Front-End Device Drivers

Para-Virtualization in Xen ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

x86 CPU virtualization ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Para-Virtualizing the MMU ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

SMP Guest Kernels ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Performance: SPECJBB Average 0.75% overhead Native 3 GHz Xeon 1GB memory / guest 2.6.9.EL vs. 2.6.9.EL-xen

Performance: dbench < 5% Overhead up to 8 way SMP

Kernel build 32b PAE; Parallel make, 4 processes per CPU 5% 8% 13% 18% 23% Source: XenSource, Inc: 10/06 # Virtual CPUs

I/O Architecture ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Isolated Driver Domains Event Channel Virtual MMU Virtual CPU Control IF Hardware (SMP, MMU, physical memory, Ethernet, SCSI/IDE) Native Device Driver GuestOS (XenLinux) Device Manager & Control s/w VM0 Native Device Driver GuestOS (XenLinux) VM1 Front-End Device Drivers GuestOS (XenLinux) Unmodified User Software VM2 Front-End Device Drivers GuestOS (XenBSD) Unmodified User Software VM3 Safe HW IF Xen Virtual Machine Monitor Back-End Back-End Driver Domain

Isolated Driver VMs ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],0 50 100 150 200 250 300 350 0 5 10 15 20 25 30 35 40 time (s)

Hardware Virtualization (1) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Hardware Virtualization (2) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Hardware Virtualization (3) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Xen 3: Hardware Virtual Machines ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Native Device Drivers Control Panel (xm/xend) Front end Virtual Drivers Linux xen64 Device Models Guest BIOS Unmodified OS Domain N Linux xen64 Callback / Hypercall VMExit Virtual Platform 0D Backend Virtual driver Native Device Drivers Domain 0 Event channel 0P 1/3P 3P Guest BIOS Unmodified OS VMExit Virtual Platform 3D HVM Architecture Guest VM (HVM) (32-bit mode) Guest VM (HVM) (64-bit mode) I/O: PIT, APIC, PIC, IOAPIC Processor Memory Control Interface Hypercalls Event Channel Scheduler

Progressive Paravirtualization ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Native Device Drivers Control Panel (xm/xend) Front end Virtual Drivers Linux xen64 Device Models Guest BIOS Unmodified OS Domain N Linux xen64 Callback / Hypercall VMExit Virtual Platform 0D Backend Virtual driver Native Device Drivers Domain 0 Event channel 0P 1/3P 3P FE Virtual Drivers Guest BIOS Unmodified OS VMExit Virtual Platform FE Virtual Drivers 3D PIC/APIC/IOAPIC emulation Guest VM (HVM) (32-bit mode) Guest VM (HVM) (64-bit mode) Xen 3.0.3 Enhanced HVM I/O I/O: PIT, APIC, PIC, IOAPIC Processor Memory Control Interface Hypercalls Event Channel Scheduler

HVM I/O Performance Measured with ttcp (1500 byte MTU) Emulated I/O PV on HVM Pure PV Source: XenSource, Sep 06

Native Device Drivers Control Panel (xm/xend) Front end Virtual Drivers Linux xen64 Guest BIOS Unmodified OS Domain N Linux xen64 Callback / Hypercall VMExit Virtual Platform 0D Guest VM (HVM) (32-bit mode) Backend Virtual driver Native Device Drivers Domain 0 Event channel 0P 1/3P 3P FE Virtual Drivers Guest BIOS Unmodified OS VMExit Virtual Platform Guest VM (HVM) (64-bit mode) FE Virtual Drivers 3D IO Emulation IO Emulation Future plan: I/O stub domains. Device Models PIC/APIC/IOAPIC emulation I/O: PIT, APIC, PIC, IOAPIC Processor Memory Control Interface Hypercalls Event Channel Scheduler

HW Virtualization Summary ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

What is XenEnterprise? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],“ Ten minutes to Xen”

Get Started with XenEnterprise ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],“ Ten minutes to Xen”

A few XE 3.2 Screenshots… Resource usage statistics Windows 2003 Server Windows XP Easy VM Creation Clone and Export VMs Red Hat Linux 4

w2k3 SPECcpu2000 integer (multi)

w2k3 Passmark-CPU results vs native

w2k3 Passmark memory vs native

Performance: Conclusions ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Live Migration of VMs: Motivation ,[object Object],[object Object],[object Object],[object Object],[object Object],Xen Xen

Assumptions ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Xen Xen Storage

Challenges ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Relocation Strategy Stage 0: pre-migration Stage 1: reservation Stage 2: iterative pre-copy Stage 3: stop-and-copy Stage 4: commitment VM active on host A Destination host selected (Block devices mirrored) Initialize container on target host Copy dirty pages in successive rounds Suspend VM on host A Redirect network traffic Synch remaining state Activate on host B VM state on host A released

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Writeable Working Set

Rate Limited Relocation ,[object Object],[object Object],[object Object],[object Object],[object Object]

Iterative Progress: SPECWeb 52s

Xen 3.1 Highlights ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Xen 3.x Roadmap ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Backed By All Major IT Vendors * Logos are registered trademarks of their owners

Summary ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Thanks! ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Xen Euro Par07

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