Which is faster? 4x10k SAS Drives in RAID 10 or 3x15k SAS Drives in RAID 5?

Posted by Jenkz on Server Fault See other posts from Server Fault or by Jenkz
Published on 2010-03-10T23:21:18Z Indexed on 2010/03/11 4:41 UTC
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Filed under:

raid

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mysql

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speed

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database-performance

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disk-performance

I am reviewing quote for a server upgrade. (RHEL).

The server will have both Apache and MySQL on it, but the reason for upgrade is to increase DB performance. CPU has been upgraded massively, but I know that disk speed is also a factor.

So RAID 10 is faster performance than RAID 5, but how much difference does the drive speed make?

(The 15k discs in the RAID 5 config is at the top of my budget btw, hence not considdering 4x15k discs in RAID 10, which I assume would be the optimum.)

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