 | | | Excessive IO wait with megaraid card | Excessive IO wait with megaraid card 2006-11-29 - By Jeffrey Siegal
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On Nov 29, 2006, at 08:02 , Paul Krizak wrote:
> We've also had significant problems with the Megaraid card on our
> Celestica Quartet quad opterons. Most notably, RAID-5 (See http://AID-5.ora-code.com) is total
> crap on it. Trying to run a database (MySQL in our case) on a
> Megaraid RAID-5 (See http://AID-5.ora-code.com) backend was too slow to even be useable. We ended
> up in a RAID 1+0 configuration that performed quite well.
No experience with Megaraid but not necessarily and issue with the
card. RAID-5 (See http://AID-5.ora-code.com) is just fundamentally poor for some database workloads.
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