linux-kernel - Re: Fwd: Re: RAID performance is not too well....

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Message-Id: <200707091830.51707.a1426z@gawab.com>
Date:	Mon, 9 Jul 2007 18:30:51 +0300
From:	Al Boldi <a1426z@...ab.com>
To:	Rogier Wolff <R.E.Wolff@...Wizard.nl>
Cc:	linux-kernel@...r.kernel.org, linux-raid@...r.kernel.org
Subject: Re: Fwd: Re: RAID performance is not too well....

Rogier Wolff wrote:
> > >I have an application that creates some 228 thousand files,
> > >spread over about 4000 directories. Total is not more than
> > >1.3Gb.  (I'm not sure, and I don't care if it's 10% or 90% of
> > >that number)
> > >
> > >Anyway, I've loaded all of the 1.3Gb into the cache (the machine
> > >has 8Gb of RAM), so that only writes need to take place.
> > >
> > >After a while the machine goes into a routine of writing
> > >about 500 to 1000kbytes per second.
> > >
> > >Sync seems to take a long time:

The as-iosched has a sync bug, and if you are using that, then try deadline 
instead.

Thanks!

--
Al

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