Xen Project Release Features: Difference between revisions

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(Try to improve formatting to more clearly show the divisions in the page)
(Indicate tech preview/prototype features will a notation in the table itself rather than footnotes.)
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|-
|-
|Physical CPUs
|Physical CPUs
|128 <sup>[ [[#Foot1|1]] ]</sup>
|128 <sup>[ [[#Foot0|0]] ]</sup>
|>255
|>255
|-
|-
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|{{Tick}}
|{{Tick}}
|-
|-
|HVM Guest <sup>[ [[#Foot0|0]] ]<br/><small>Fully virtualised guest using hardware virtualisation extensions</small>
|HVM Guest <sup>[ [[#Foot1|1]] ]<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>[ [[#Foot1|1]] ]<br/><small>Fully virtualised guest using PV extensions for improved performance</small>
|{{Tick}}
|{{Tick}}
|{{Tick}}
|{{Tick}}
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|-
|-
|[[XL]]
|[[XL]]
|Initial implementation
|{{HalfDone}}<small>initial implementation</small>
|Preview release
|{{HalfDone}}<small>preview release</small>
|-
|-
!colspan="3"|<big>Features</big>
!colspan="3"|<big>Features</big>
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|-
|-
|Memory Sharing
|Memory Sharing
|{{Tick}} <sup>[ [[#Foot3|3]] ]</sup>
|{{HalfDone}}<small>tech preview</small>
|{{Tick}} <sup>[ [[#Foot3|3]] ]</sup>
|{{HalfDone}}<small>tech preview</small>
|-
|-
|Online resize of virtual disks
|Online resize of virtual disks
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|[[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>
|{{HalfDone}}<small>prototype</small>
|-
|-
|1GB/2MB super page support
|1GB/2MB super page support
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|qemu based disk backend (''qdisk'') for [[XL]]<br/>
|qemu based disk backend (''qdisk'') for [[XL]]<br/>
|
|
|{{Tick}} <sup>[ [[#Foot5|5]] ]</sup>
|{{Tick}} <sup>[ [[#Foot3|3]] ]</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>
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<hr/>
<hr/>


<span id="Foot0"><sup>[ 0 ]</sup> Required hardware virtualisation support</span><br/>
<span id="Foot1"><sup>[ 0 ]</sup> Compile time limit, can be increased</span><br/>
<span id="Foot1"><sup>[ 1 ]</sup> Compile time limit, can be increased</span><br/>
<span id="Foot0"><sup>[ 1 ]</sup> Requires hardware virtualisation support</span><br/>
<span id="Foot2"><sup>[ 2 ]</sup> Disabled by default (enable with hypervisor command line option)</span><br/>
<span id="Foot2"><sup>[ 2 ]</sup> Disabled by default (enable with hypervisor command line option)</span><br/>
<span id="Foot3"><sup>[ 3 ]</sup> Initial implementation (tech preview)</span><br/>
<span id="Foot3"><sup>[ 3 ]</sup> Used as a fallback if ''blkback'' and/or ''blktap2'' are not available</span><br/>
<span id="Foot4"><sup>[ 4 ]</sup> Prototype</span><br/>
<span id="Foot5"><sup>[ 5 ]</sup> Used as a fallback if ''blkback'' and/or ''blktap2'' are not available</span><br/>

Revision as of 11:46, 25 June 2012

Xen 4.0 Xen 4.1
Initial Release 7 April 2010 25 March 2011
Host Limits
Physical CPUs 128 [ 0 ] >255
RAM 1TB 5TB
Guest Types
Paravirtualised
Traditional Xen PV guest 		✓ ✓
HVM Guest [ 1 ]
Fully virtualised guest using hardware virtualisation extensions 		✓ ✓
PV-on_HVM Guest [ 1 ]
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 ✓tech preview ✓tech preview
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. 		✓prototype
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
 ✓ [ 3 ]
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 ] Compile time limit, can be increased
[ 1 ] Requires hardware virtualisation support
[ 2 ] Disabled by default (enable with hypervisor command line option)
[ 3 ] Used as a fallback if blkback and/or blktap2 are not available

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