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bakytn
Asked: 2012-03-01 12:07:14 +0800 CST

Estimate the IOPS in RAID 10

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According to http://en.wikipedia.org/wiki/IOPS

For example SAS disks provide ~200 IOPS each.

For RAID 10 consisting of 4 such disks.

How much IOPS I could expect for that array?

I would think it would be about 400 or is it 800? (800 especially in reads? and lower on writes?)

raid raid10 iops

1 Answers

  1. Best Answer

    The exact number, or even a reasonable estimate, would be impossible to guess based on this information. Many server grade disks have published number; but the RAID system may or may not take full advantage of the disks. The RAID HBAs generally also have some published benchmarks. Extrapolating from these is the best guess you'll get without testing an actual setup.

    So while a a theoretical setup with 4 disks each capable of 200 IOps could sustain 800 IOps Read and 400 IOps Write, the actual number would be less, and might be significantly less.

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