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December 17th, 2008 07:00
determining max IOPs for a raid group/LUN
Is there some way to lookup/calculate the maximum IOPs for a raid group or lun?
The question we're trying to answer is how many VM's we can run off any given lun without bogging it down. With sata it's obviously not many, but most of our stuff is FC. Navisphere will tell me curent I/O info, but I'd like to be able to calculate where the ceiling is for performance and be able to allocate more spindles or new raid groups to handle the load
The question we're trying to answer is how many VM's we can run off any given lun without bogging it down. With sata it's obviously not many, but most of our stuff is FC. Navisphere will tell me curent I/O info, but I'd like to be able to calculate where the ceiling is for performance and be able to allocate more spindles or new raid groups to handle the load
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SanMan5
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December 17th, 2008 13:00
You would think that a simple question like that would have a simple answer.
And it does The answer is: It Depends.
It depends on the drive type, the rotational speed, the raid group type, and others.
Emc Whitepapers on the subject
EMC Clariion Storage Solutions Micosoft Exchange 2003 Best Practices has some good computations for calculating IOPS for different raid types.
EMC Clariion Best PRactices for Fibre Channel Storage talks about IOPS and Raid type along with using MetLuns.
Hope this helps.
Bing
RRR
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5.7K Posts
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December 17th, 2008 14:00
RRR
6 Operator
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5.7K Posts
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December 17th, 2008 14:00