Re: Raidframe performances (was: Re: NFS performances)

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

On Tue, May 13, 2014 at 09:14:53AM +0000, Emmanuel Dreyfus wrote:
> On Tue, May 13, 2014 at 08:20:24AM +0000, Emmanuel Dreyfus wrote:
> > Right, this is not a NFS performance problem, but a RAIDframe performance
> > probleme [RAIDframe introduces a 300% performance hit]
> 
> I found this:
> https://zhadum.org.uk/2008/07/25/raid-and-file-system-performance-tuning/
> 
> The situaton is the best case: 128 sector per stripe, 16kB block size, 2kB 
> fragment size.
> 
> I also found this:
> https://mail-index.netbsd.org/tech-kern/2012/11/13/msg014388.html
> 
> But remounting without -o log does not improve the situation. It looks
> like if RAIDframe is the only culprit.

You should also check the partition alignements.
Also, you didn't say what the underlying hardware is.

-- 
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
     NetBSD: 26 ans d'experience feront toujours la difference
--