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IOPS Test

Posted on 2013-07-02
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Last Modified: 2013-07-11
A provider has ran some IOPS test on our VM (without notice) via a script in toad!?  
Is this a known application that is adequate for testing iops over VM's using local storage?

Are there alternatives?

Thanks
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Question by:CHI-LTD
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by:Andrew Hancock (VMware vExpert / EE MVE)
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by:CHI-LTD
ID: 39292682
ok, thanks.

Is there or can you recommend one for single host?
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by:Andrew Hancock (VMware vExpert / EE MVE)
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All of them!

We use IOMeter, but this may be too complicated, otherwise quick and easy CrystalDiskMark
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by:CHI-LTD
ID: 39292805
ok, crystal sisk mark running, what should i be looking at?
also i assume this won't really help with esxi hosts, but standalone servers?
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by:Andrew Hancock (VMware vExpert / EE MVE)
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IOPS?

Disk Read and Write specs

it's difficult to generate IOPS for the ESXi hosts, but all your IOPS are in VMs on the datastore!
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by:CHI-LTD
ID: 39296963
ok, 3 servers, same spec all with local or DAS.

Top esxtop is running an install of oracle as i type.

the other 2 are sat there, serving!

Thoughts on the stats?
iops.bmp
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ID: 39297062
they look, okay, are you having issues?
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by:CHI-LTD
ID: 39297145
Not really, only responding to our supplier who said we should be getting 4000 iops on our server..
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Andrew Hancock (VMware vExpert / EE MVE) earned 500 total points
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I would ask Why and How, based on what?

Oh should now, I thought they had evidence to suggest that they had tested, and it go this value.

You've done the calculations, and proved, that your theoretical limit is approx 2000 IOPs, with 16 disks in RAID 6.

In the real world with VMware, ALL I/O is virtualised, so you will get less than the value calculated.

To Increase IOPS, you would need to change RAID type, increase disk speed, and add more disks.
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by:CHI-LTD
ID: 39317070
Was a leftover snapshot on the host causing the iops issue.  Was 90, with snapshot deleted ran at 4000.
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