[nycbug-talk] File Backed Disks- Speed Issues
spork at bway.net
Thu Sep 28 16:16:24 EDT 2006
On Thu, 28 Sep 2006, Okan Demirmen wrote:
> I can't comment on how md(4) is performing, but I did notice you said
> RAID5/SATA. Have you created a case to eliminate RAID5/SATA? I believe
> SATA is really mostly for just raw storage and not to be used to
> anything that requires a reasonable amount I/O.
For what it's worth, I've been punishing a 3Ware 9550-SX-12 for the past
few weeks, and it has pretty much made me a convert. Any new boxes we
build with hardware raid are getting these cards. They are beating the
snot out of our Adaptec ZCR cards, both in performance and management.
Things that would require reboots and visits to the BIOS config when using
Adaptec were handled quite smoothly. Punishment included yanking a bunch
of drives during a long bonnie run, rearranging the drives, yanking power
during drive rebuilds, etc. And being able to change stripe sizes without
wiping the array is a real plus.
Sorry for the marketing,
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