On Wed, 2009-02-25 at 09:44 +0900, Jordan Tomkinson wrote:
>
>
> On Wed, Feb 25, 2009 at 9:23 AM, Joshua D. Drake
> <jd@commandprompt.com> wrote:
>
>
> RAID5 outside of RAID 0 is the worst possible RAID level to
> run with a
> database. (of the commonly used raid level's that is).
>
> It is very, very slow on random writes which is what databases
> do.
> Switch to RAID 10.
>
> surely being (real) hardware raid with 15k rpm disks this wouldn't be
> a huge issue unless a large amount of data was being written ?
Tests done by Mark Wong on a 3 disk 15k scsi versus 4 disk raid 10 scsi
show that RAID 10 is on average 30% faster.
Sincerely,
Joshua D. Drake
>
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