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Vmax virtual provisioned lun IOPS
Hello guys,
I have a lun going to an ESX host having performance degradation.
I want to find out how to calculate IOPS for a lun built from a vmax pool
The Sata pool is made out of 200 Data devices
Drives are in a raid 6, 6+2 , 1TB 7200 drives.
Do the old calculations work? Number of drives for Raid 6 = Number of reads + 6*number of writes / 80 for Sata drives
How do you guys calculate performance for virtual provisioned luns ?
I do see response time spikes and over 400 IOPS going to that lun during peak time.
It's really hard to tell from the information you gave. One factor is performance depends on how many disks this pool has extended to. I guess this LUN is not the only LUN in this pool, if that's the case, you won't get the full performance from all disks.
mattcowger1
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Posted December 15th, 2011 12:00
It would be reasonable to test this using VMware's new IO Analyzer fling: http://labs.vmware.com/flings/io-analyzer
It should give you a reasonable idea of what your LUN(s) can do.
reseach
2 Intern
•
225 Posts
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Posted November 23rd, 2011 23:00
I like to put extra 10-15% space on the result of this calculation due to the overhead of pool technical. Although pool technology would distribute IO on the device of a pool evenly, it also would break seq IO to Random IO and more CPU/RAM consumption as tradeoff.
Eddy