Using LUN infrastructure you can easily improve your virtual machine performance. You just need to remember about disk types, I/O and RAID levels when creating LUNs.
For medium and large networks ranging from 100 to 1000 VMs there are several ways to increase performance of VM. Usually best option is RAID 5 configuration along with SAN with two to four controllers, large disk cache and 10Gb iSCSI.
This will provide a good balance of virtual machine performance and cost for production workloads.
For small or test networks with less than 100 VMs administrators struggle with LUN configuration. That is because virtual infrastructure is growing faster than they anticipated and administrator have unrealistic I/O expectations.
Keeping that in mind - local storage, low-end direct-attached SCSI or iSCSI SAN with SATA drives can work well. In small or test networks where CPU and disk cache have smaller usage, try to implement RAID 10 to get additional boost in VM performance.
Depending on hardware you have, anywhere from 4 to 15 virtual machines per LUN is reasonable, but if you will assign more than your network can handle, I/O of disk will be biggest bottleneck.
It's crucial to keep that in mind - if you will have large number of CPU cores and memory unused, those resources will go to waste since I/O will limit their usage.
Source:
http://goo.gl/R6pte
For medium and large networks ranging from 100 to 1000 VMs there are several ways to increase performance of VM. Usually best option is RAID 5 configuration along with SAN with two to four controllers, large disk cache and 10Gb iSCSI.
This will provide a good balance of virtual machine performance and cost for production workloads.
For small or test networks with less than 100 VMs administrators struggle with LUN configuration. That is because virtual infrastructure is growing faster than they anticipated and administrator have unrealistic I/O expectations.
Keeping that in mind - local storage, low-end direct-attached SCSI or iSCSI SAN with SATA drives can work well. In small or test networks where CPU and disk cache have smaller usage, try to implement RAID 10 to get additional boost in VM performance.
Depending on hardware you have, anywhere from 4 to 15 virtual machines per LUN is reasonable, but if you will assign more than your network can handle, I/O of disk will be biggest bottleneck.
It's crucial to keep that in mind - if you will have large number of CPU cores and memory unused, those resources will go to waste since I/O will limit their usage.
Source:
http://goo.gl/R6pte
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