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Virtualization SoftwareXen 3 Xen 4KVM 5KVM 6VMwarevCloud
Feature      
Integrated StorageYYYYNN
Cloud BootYN
CentOS 6 64bit (roadmap)
NCentOS 6 64bitNN
Smart ServersNNYYNN
Incremental backupsYYYYNN
Load balancing clustersYYYYNN
Autoscaling

Y

Linux VSs only

Y

Linux VSs only

Y

Linux VSs only

Y

Linux VSs only

NN
RecipesYYYYYN
Edge serversYYYYNN
Balooning release resource type for Compute zonesNNYYNN
CPU UnitsYY

Y

N for CentOS5

Y

NN
Virtual server options      
Hot RAM resize without reboot**YYY**Y**Windows 2008 and Windows 7 VSsN
Hot CPU cores resize without rebootYYYYWindows 2008 and Windows 7 VSs.
Some Linux distributions
N
Hot migration**Available for some Linux, Windows 2003/2008 VSsAvailable for some Linux, Windows 2003/2008 VSsAvailable for some Linux, Windows 2003/2008 VSsAvailable for some Linux, Windows 2003/2008 VSs
(via vCenter)
N
Cold migration Y Y Y Y

VMware utilizes vMotion to ensure that the VSs are optimallyplaced on the compute resources

N
Disk hot attachment / detachmentNNNAvailable for Linux VSs
(Virtio templates)
NN
Disk resize (increase/decrease)

Available for Linux VSs.

FreeBSD -  increase only is available. Disk

size decrease

resize is not available for

non-

primary FreeBSD disks.

Disk size decrease is not available for Integrated Storage.

Available for Linux VSs.

FreeBSD -  increase only is available. Disk

size decrease

resize is not available for

non-

primary FreeBSD disks.

Available for Linux VSs.

FreeBSD -  increase only is available. Disk

size decrease

resize is not available for

non-

primary FreeBSD disks.

Available for Linux VSs.

FreeBSD -  increase only is available. Disk

size decrease

resize is not available for

non-

primary FreeBSD disks..

Disk size decrease is not available for Integrated Storage.

Y -  Increase only. Reboot is required.Y - cold
IPv6 support ***YYYYNN
Reboot in recoveryYYYYNN

Segregate 

YYYYNN

VIP status

YYYYNN
FirewallYYYY

N

presented withpublishing rules  

Y
BackupsYYYY

seeVMware VS Snaphots

see Virtual Server Snapshots
Change ownerYYYYNN
CPU TopologyNNYYNN

 

** Detailed info about RAM resize without reboot and hot-migrate abilities per template is available at:          

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