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Hi everybody !
I'm trying to use IOmeter to test a new AFF220 metrocluster.
However, i don't really know which parameters to use to test it...
How many workers should i use ?
I don't really know what is Tranfert Request Size, Align I/Os if you have any ideas ?
I did a try with 4K 100% random on a windows VM with 10 workers. Display results are showing 36K IOPS, however, on the LUN where resides the VM, can't go over 2000 IOPS.. Don't get that !
Thanks !
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Hi there!
Synthetic IOPS Testing is not.. a great measure of anything. Have a view of this video for a bit of a discussion about why - https://www.youtube.com/watch?v=Gfg1pNMCqUQ
Are you concerned by the performance of your system? or rather, what brings you to want to test?
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Hello,
Thanks for your answer.
I just wanted to guarantee that the metrocluster supports for example 30K IOPs. However, we don't have that much VMs on it so wanted to use a tool to "stress" the metrocluster to see how it goes.
Thanks
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Here we come to the problem of IO speed tests.
As you say, you have run one test which shows 36,000 IOPS, therefore, it can do 30,000+ IOPS.
What is the difference between the networking, connection etc of that test and the one which shows 4,000 IOPS?
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Hello,
Yes i can see 36K IOPs from the IOmeter application.
However, when i had a look on the LUN where we simulated IOPs, i can't go over 2K IOPs.
Wanted to understand what could explain this difference... I tried to had a look as well on the volume or aggregate and same problem.
Regards ;
