Re: 3ware + RAID5 + xfs performance

[Jan-Frode Myklebust <Jan-Frode.Myklebust@xxxxxxxxxxx>]

On Wed, Jul 27, 2005 at 09:15:31AM -0700, Harry Mangalam wrote:
> That's very impressive!  How many config iterations did you have to do to get 
> this perf? 

Not too many I think.. only tried a few tunings of stripe-unit in the
3ware CLI, and scratched my heads a few times to try to understand the
mkfs.xfs sunit/swidth-options..

> 
> I'd certainly consider GPFS but I was under the impression that it was only 
> available for IBM-branded Linux boxes w/ customized kernels.  Can you buy it 
> a la carte?

Yes, and maybe even for free from the IBM Scholars programme if you
qualify. But yes, it does require a couple of "GPFS" kernel modules,
which will typically only build for vendor kernels (i.e. not keeping
up with the latest kernel.org releases). We're running a RHEL-3 clone,
so that's not been a problem for us so far.


  -jf