Sean Cook wrote:
This is not necessarily the case, typically if you are CPU bound then
the above statement is true. If you are IO bound, then software raid
offers, overall, better throughput to the disk and allows for more
flexibility.
Back in the day... we were running the LSI MegaRAID controllers with
RAID 1 on 9gig SCSI disks, we were choking our application
(mysql/mod_perl) we took the MegaRAID controller out and performance
increased by about 25%. (note: this is a real world situation)
Then you my friend had some seriously broken hardware. I've never seen
anything get slower by moving to dedicated RAID card and usually it got
2-3x faster due to having a dedicated local cache on the card.
kashani
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