Optimize RAID0 for max IOPS?

[Wolfgang Denk]

Dear Dave Chinner,

In message <20110125083643.GE28803 at dastard> you wrote:
>
> Oh, despite $subject being "RAID0" the filesystems being tested are
> on RAID5 and RAID6 with very small chunk sizes on slow SATA drives.
> This is smelling like a case of barrier IOs on software raid on
> cheap storage....

Right. [Any way to avoid these, btw?]  I got side-tracked by the
comments about the new (to me) delaylog mount option to xfs; as the
results were not exactly as exp[ected I though it might be interesting
to report these.

But as the subject says, my current topic is tuning RAID0 to avoid
exactly this type of bottleneck; or rather looking for tunable options
on RAID0

Best regards,

Wolfgang Denk

--
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
PLEASE NOTE: Some Quantum Physics Theories Suggest That When the Con-
sumer Is Not Directly Observing This Product, It May Cease  to  Exist
or Will Exist Only in a Vague and Undetermined State.