LUN size for VM ...

[avamar11]

Hi All ,
I have a XP10000 ,which has 300 GB disk in RAID 5 (3D+1P) config .I looking for best practices to allocate LUNs to VMware ESX server .Should I allocate a single larger LUN (600 -700 GB ) to ESX ,which in tirn will be used to create 5 VMs ,though this way all IOPS will be services by the same RAID group OR should I give smaller LUNs from 2 or 3 RAID groups so as to distribute the IOPS between them ?
Kindly help .....

[Patrick Terlisten]

Hello,

a LUN size between 500 GB an 1 TB is perfect. You should distribute them across the raid groups. VMFS filesystems with a high load shouldn't reside on the same raid group. VMs with a high load shouldn't reside in the same VMFS.

VMware recommend not more then 12 to 15 VMs per VMFS, not more then 10 ESX servers per LUN.

Best regards,
Patrick

[avamar11]

Can some elaborate more ,like effect on RAID 5 ( 3d+1P or 7D+1P) ...does any one also some info about Oracle VM ...