Xen Project Release Features: Difference between revisions

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(AVX is not enabled by default in 4.1)
(Try to improve formatting to more clearly show the divisions in the page)
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!style="width: 20%;"|Xen 4.1
!style="width: 20%;"|Xen 4.1
|-
|-
!Initial Release
|Initial Release
|7 April 2010
|7 April 2010
|25 March 2011
|25 March 2011
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!colspan="3"|<big>Host Limits</big>
!colspan="3"|<big>Host Limits</big>
|-
|-
!Physical CPUs
|Physical CPUs
|128 <sup>[ [[#Foot1|1]] ]</sup>
|128 <sup>[ [[#Foot1|1]] ]</sup>
|>255
|>255
|-
|-
!RAM
|RAM
|1TB
|1TB
|5TB
|5TB
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!colspan="3"|<big>[[Xen Overview#Guest_Types|Guest Types]]</big>
!colspan="3"|<big>[[Xen Overview#Guest_Types|Guest Types]]</big>
|-
|-
!Paravirtualised<br/><small>Traditional Xen ''PV'' guest</small>
|Paravirtualised<br/><small>Traditional Xen ''PV'' guest</small>
|{{Tick}}
|{{Tick}}
|{{Tick}}
|{{Tick}}
|-
|-
!HVM Guest <sup>[ [[#Foot0|0]] ]<br/><small>Fully virtualised guest using hardware virtualisation extensions</small>
|HVM Guest <sup>[ [[#Foot0|0]] ]<br/><small>Fully virtualised guest using hardware virtualisation extensions</small>
|{{Tick}}
|{{Tick}}
|{{Tick}}
|{{Tick}}
|-
|-
!PV-on_HVM Guest <sup>[ [[#Foot0|0]] ]<br/><small>Fully virtualised guest using PV extensions for improved performance</small>
|PV-on_HVM Guest <sup>[ [[#Foot0|0]] ]<br/><small>Fully virtualised guest using PV extensions for improved performance</small>
|{{Tick}}
|{{Tick}}
|{{Tick}}
|{{Tick}}
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!colspan="3"|<big>PV Guest Limits</big>
!colspan="3"|<big>PV Guest Limits</big>
|-
|-
!Virtual CPUs
|Virtual CPUs
|128
|128
|>255
|>255
|-
|-
!RAM
|RAM
|512GB
|512GB
|512GB
|512GB
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!colspan="3"|<big>HVM Guest Limits</big>
!colspan="3"|<big>HVM Guest Limits</big>
|-
|-
!Virtual CPUs
|Virtual CPUs
|128
|128
|128
|128
|-
|-
!RAM
|RAM
|1TB
|1TB
|1TB
|1TB
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!colspan="3"|<big>Toolstack</big>
!colspan="3"|<big>Toolstack</big>
|-
|-
!xend / xm
|xend / xm
|{{Tick}}
|{{Tick}}
|{{Tick}}
|{{Tick}}
|-
|-
![[XL]]
|[[XL]]
|Initial implementation
|Initial implementation
|Preview release
|Preview release
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!colspan="3"|<big>Features</big>
!colspan="3"|<big>Features</big>
|-
|-
!Live Migration, Save & Restore
|Live Migration, Save & Restore
|{{Tick}}
|{{Tick}}
|{{Tick}}
|{{Tick}}
|-
|-
!Memory ballooning
|Memory ballooning
|{{Tick}}
|{{Tick}}
|{{Tick}}
|{{Tick}}
|-
|-
![[Blktap2]]
|[[Blktap2]]
|{{Tick}}
|{{Tick}}
|{{Tick}}
|{{Tick}}
|-
|-
![[Xen PCI Passthrough|PCI Passthrough]]
|[[Xen PCI Passthrough|PCI Passthrough]]
|{{Tick}}
|{{Tick}}
|{{Tick}}
|{{Tick}}
|-
|-
![http://oss.oracle.com/projects/tmem/ TMEM] -- Transcendent Memory
|[http://oss.oracle.com/projects/tmem/ TMEM] -- Transcendent Memory
|{{Tick}} <sup>[ [[#Foot2|2]] ]</sup>
|{{Tick}} <sup>[ [[#Foot2|2]] ]</sup>
|{{Tick}} <sup>[ [[#Foot2|2]] ]</sup>
|{{Tick}} <sup>[ [[#Foot2|2]] ]</sup>
|-
|-
!gdbsx<br/><small>debugger to debug ELF guests</small>
|gdbsx<br/><small>debugger to debug ELF guests</small>
|{{Tick}}
|{{Tick}}
|{{Tick}}
|{{Tick}}
|-
|-
!Memory Sharing
|Memory Sharing
|{{Tick}} <sup>[ [[#Foot3|3]] ]</sup>
|{{Tick}} <sup>[ [[#Foot3|3]] ]</sup>
|{{Tick}} <sup>[ [[#Foot3|3]] ]</sup>
|{{Tick}} <sup>[ [[#Foot3|3]] ]</sup>
|-
|-
!Online resize of virtual disks
|Online resize of virtual disks
|{{Tick}}
|{{Tick}}
|{{Tick}}
|{{Tick}}
|-
|-
![[Remus]] Fault Tolerance
|[[Remus]] Fault Tolerance
|{{Tick}}
|{{Tick}}
|{{Tick}}
|{{Tick}}
|-
|-
!Physical CPU Hotplug
|Physical CPU Hotplug
|{{Tick}}
|{{Tick}}
|{{Tick}}
|{{Tick}}
|-
|-
!Physical Memory Hotplug
|Physical Memory Hotplug
|{{Tick}}
|{{Tick}}
|{{Tick}}
|{{Tick}}
|-
|-
!Support for PV kernels in bzImage format
|Support for PV kernels in bzImage format
|{{Tick}}
|{{Tick}}
|{{Tick}}
|{{Tick}}
|-
|-
![[Credit2 Scheduler Development|Credit 2 Scheduler]]<br/><small>designed for latency-sensitive workloads and very large systems.</small>
|[[Credit2 Scheduler Development|Credit 2 Scheduler]]<br/><small>designed for latency-sensitive workloads and very large systems.</small>
|
|
|{{Tick}} <sup>[ [[#Foot4|4]] ]</sup>
|{{Tick}} <sup>[ [[#Foot4|4]] ]</sup>
|-
|-
!1GB/2MB super page support
|1GB/2MB super page support
|
|
|{{Tick}}
|{{Tick}}
|-
|-
!x86 Advanced Vector eXtension (AVX)
|x86 Advanced Vector eXtension (AVX)
|
|
|{{Tick}} <sup>[ [[#Foot2|2]] ]</sup>
|{{Tick}} <sup>[ [[#Foot2|2]] ]</sup>
|-
|-
!cpupool<br/><small>advanced partitioning</small>
|cpupool<br/><small>advanced partitioning</small>
|
|
|{{Tick}}
|{{Tick}}
|-
|-
!memaccess API<br/><small>enabling integration of 3rd party security solutions into Xen virtualized environments</small>
|memaccess API<br/><small>enabling integration of 3rd party security solutions into Xen virtualized environments</small>
|
|
|{{Tick}}
|{{Tick}}
|-
|-
!Deliver events to PVHVM guests using event channels
|Deliver events to PVHVM guests using event channels
|
|
|{{Tick}}
|{{Tick}}
|-
|-
!HVM PXE Stack
|HVM PXE Stack
|gPXE
|gPXE
|[http://ipxe.org iPXE]
|[http://ipxe.org iPXE]
|-
|-
!xentrace<br/><small>performance analysis</small>
|xentrace<br/><small>performance analysis</small>
|{{Tick}}
|{{Tick}}
|{{Tick}}
|{{Tick}}
|-
|-
!qemu based disk backend (''qdisk'') for [[XL]]<br/>
|qemu based disk backend (''qdisk'') for [[XL]]<br/>
|
|
|{{Tick}} <sup>[ [[#Foot5|5]] ]</sup>
|{{Tick}} <sup>[ [[#Foot5|5]] ]</sup>
|-
|-
![[Xen Security Modules : XSM-FLASK|FLASK]]<br/><small>mandatory access control policy providing fine-grained controls over Xen domains, similar to SELinux</small>
|[[Xen Security Modules : XSM-FLASK|FLASK]]<br/><small>mandatory access control policy providing fine-grained controls over Xen domains, similar to SELinux</small>
|{{Tick}}
|{{Tick}}
|{{Tick}}
|{{Tick}}
|-
|-
!<big>[[PyGrub]]</big>
!colspan="3"|<big>[[PyGrub]]</big>
|-
|-
!Support for GRUB 2
|Support for GRUB 2
|{{Tick}}
|{{Tick}}
|{{Tick}}
|{{Tick}}
|-
|-
!Support for /boot on ext4
|Support for /boot on ext4
|{{Tick}}
|{{Tick}}
|{{Tick}}
|{{Tick}}
|-
|-
!<big>Third Party</big>
!colspan="3"|<big>Third Party</big>
|-
|-
![http://libvirt.org libvirt] driver for [[XL]]
|[http://libvirt.org libvirt] driver for [[XL]]
|
|
|{{Tick}}
|{{Tick}}

Revision as of 11:24, 25 June 2012

Xen 4.0 Xen 4.1
Initial Release 7 April 2010 25 March 2011
Host Limits
Physical CPUs 128 [ 1 ] >255
RAM 1TB 5TB
Guest Types
Paravirtualised
Traditional Xen PV guest 		✓ ✓
HVM Guest [ 0 ]
Fully virtualised guest using hardware virtualisation extensions 		✓ ✓
PV-on_HVM Guest [ 0 ]
Fully virtualised guest using PV extensions for improved performance 		✓ ✓
PV Guest Limits
Virtual CPUs 128 >255
RAM 512GB 512GB
HVM Guest Limits
Virtual CPUs 128 128
RAM 1TB 1TB
Toolstack
xend / xm ✓ ✓
XL Initial implementation Preview release
Features
Live Migration, Save & Restore ✓ ✓
Memory ballooning ✓ ✓
Blktap2 ✓ ✓
PCI Passthrough ✓ ✓
TMEM -- Transcendent Memory ✓ [ 2 ] ✓ [ 2 ]
gdbsx
debugger to debug ELF guests 		✓ ✓
Memory Sharing ✓ [ 3 ] ✓ [ 3 ]
Online resize of virtual disks ✓ ✓
Remus Fault Tolerance ✓ ✓
Physical CPU Hotplug ✓ ✓
Physical Memory Hotplug ✓ ✓
Support for PV kernels in bzImage format ✓ ✓
Credit 2 Scheduler
designed for latency-sensitive workloads and very large systems. 		✓ [ 4 ]
1GB/2MB super page support ✓
x86 Advanced Vector eXtension (AVX) ✓ [ 2 ]
cpupool
advanced partitioning 		✓
memaccess API
enabling integration of 3rd party security solutions into Xen virtualized environments 		✓
Deliver events to PVHVM guests using event channels ✓
HVM PXE Stack gPXE iPXE
xentrace
performance analysis 		✓ ✓
qemu based disk backend (qdisk) for XL
 ✓ [ 5 ]
FLASK
mandatory access control policy providing fine-grained controls over Xen domains, similar to SELinux 		✓ ✓
PyGrub
Support for GRUB 2 ✓ ✓
Support for /boot on ext4 ✓ ✓
Third Party
libvirt driver for XL ✓

[ 0 ] Required hardware virtualisation support
[ 1 ] Compile time limit, can be increased
[ 2 ] Disabled by default (enable with hypervisor command line option)
[ 3 ] Initial implementation (tech preview)
[ 4 ] Prototype
[ 5 ] Used as a fallback if blkback and/or blktap2 are not available

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