From: mru@kth.se (Måns Rullgård)
To: linux-raid@vger.kernel.org
Subject: Re: Life's too short ...(Raid 1 sync times)
Date: Sun, 29 Feb 2004 22:29:59 +0100 [thread overview]
Message-ID: <yw1xr7wd1smg.fsf@kth.se> (raw)
In-Reply-To: 40423D29.1050401@sauce.co.nz
Richard Scobie <richard@sauce.co.nz> writes:
> I am in the process of benchmarking a 4 x 250GB on 3ware 7506 to try and
> sort out the myriad of options for RAID and XFS, in order to get best
> performance for my workload.
>
> I have tested with software RAID5 and have just attempted to do the same
> for software RAID 10. Unfortunately, it is going to take 31000 minutes,
> or around 21 days to sync this array and I wish to test 3 different
> stripe sizes. Is there some way to allow more bandwidth for the sync up?
echo 200000 > /proc/sys/dev/raid/speed_limit_min
It's a known bug. The resync code is trying to be nice to other IO in
the system, but forgets that it is itself causing lots of IO in the
lower RAID layer.
--
Måns Rullgård
mru@kth.se
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prev parent reply other threads:[~2004-02-29 21:29 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-02-29 19:27 Life's too short ...(Raid 1 sync times) Richard Scobie
2004-02-29 19:40 ` Jeff Garzik
2004-02-29 20:47 ` Gordon Henderson
2004-02-29 21:29 ` Måns Rullgård [this message]
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