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Citrix XenServer 6.1 limitations

Citrix have released 28th September 2012 a new version of the all mighty XenServer 6.1 The Xen is back and the change is awesome so lets dig in what the limitations are.

I will write an article later where i compare XenServer 6.1 with Hyper-V 3.0 and vSphere 5.1

Virtual Machine Limits

CPU Limits
Virtual CPUs per Virtual Machine 16
RAM per Virtual Machine 128 GB
Virtual disks (including CD-ROM) per Virtual Machine 16
Virtual CD-ROM drives per Virtual Machine 1
Virtual Disk Size (NFS) 2TB minus 4 MB
Virtual Disk Size (LVM) 2TB minus 4 MB
Virtual NICs per Virtual Machine 7


XenServer Host Limits

Logical processors per host 160
Virtual CPUs per host 900
Concurrent VMs per host 150
Concurrent XenDesktop VMs per host 150
Concurrent PVS VMs per host 150
Concurrent XenDesktop VMs using IntelliCache per host 150
Concurrent protected VMs per host with HA enabled 60
RAM per host 1 TB
Concurrent active virtual discs per host 512
Physical NICs per host 16
Physical NICs per network bond 4
Virtual NICs per host 512
VLANs per host 800
GPUs per host 4


Resource Pool Limits

Hosts per resource pool 16
VLANS per resource pool 800
Active hosts per cross-server private network 16
Cross-server private networks per resource pool 16
Virtual NICs per cross-server private network 16
Cross-server private network virtual NICs per resource pool 256
Hosts per vSwitch controller 64
Virtual NICs per vSwitch controller 1024
Virtual machines per vSwitch controller 1024
Disaster Recovery
Concurrent exports via Virtual Machine Protection Recovery 2
Integrated Site Recovery storage repositories per resource pool 8
Paths to a LUN 8
Multi-pathed LUNs per host 150
VDIs per SR 600
Storage XenMotion
(non-CDROM) VDIs per VM 6
Snapshots per VM 1
Concurrent transfers 3
Concurrent operations per pool 25

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