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desperadeo
7 Posts
0
139274
September 29th, 2014 08:00
IOPS performance on Dell EqualLogic
Hi there,
We have a PS 6100 with 24 SAS HD (10K 900GB) configured on a 50 RAID.
I have proceeded performance tests to have an idea about max IOPS that the storage device can deliver.
According to the theory, each hard disk can normally deliver about 140 IOPS.
- with 100% read, the max IOPS should be 140 x 22 (2 spare disks) = 3080
- with 50% read and 50% write, max IOPS = 3080 * 50% + (3080 * 50% / 4) = 1925
When i use IOmeter, in sequential mode with 64k blocksize, i obtain :
- 100% read = 7300 IOPS
- 50% read / 50% write = 7000 IOPS (5000 / 2000)
SAN HQ displays the same values.
How comes this huge difference ?
desperadeo
7 Posts
7567
0
Posted October 3rd, 2014 02:00
I already read this guide to configure our storage environment in order to obtain the best performances between the ESX hosts and the EQL devices :)
I can get the IOPS per volume with SAN HQ, can you suggest me a nice software which gives IOPS per VM ?
desperadeo
7 Posts
7567
0
Posted September 30th, 2014 01:00
Hello Donald,
My storage device is only used for my vSphere platform and the average size of block (displayed by SAN HQ) is :
With a 70%R/30%W workload.
If I understand your meaning, the IO performance is not only about the performance of hard drives but I need to take into account the storage controller, cache and software.
If a new project requires an estimated IOPS, how do I know that the storage device (bought in the future) would be able to deliver them without loss of performance ?