Re: Optimize RAID0 for max IOPS?

[Justin Piszcz <jpiszcz@xxxxxxxxxxxxxxx>]

On Mon, 24 Jan 2011, CoolCold wrote:

> > So can anybody help answering these questions:
> >
> > - are there any special options when creating the RAID0 to make it
> >  perform faster for such a use case?
> > - are there other tunables, any special MD / LVM / file system /
> >  read ahead / buffer cache / ... parameters to look for?
> XFS is known for it's slow speed on metadata operations like updating
> file attributes/removing files..but things gonna change after 2.6.35
> where delaylog is used. Citating Dave Chinner :
> < dchinner> Indeed, the biggest concurrency limitation has
> traditionally been the transaction commit/journalling code, but that's
> a lot more scalable now with delayed logging....
>
> So, you may need to benchmark fs part.
Some info on XFS benchmark with delaylog here:
http://comments.gmane.org/gmane.comp.file-systems.xfs.general/34379

Justin.