From: mru@kth.se (Måns Rullgård)
To: linux-kernel@vger.kernel.org
Subject: Re: RAID1 resync speed in 2.6.0
Date: Tue, 06 Jan 2004 12:03:07 +0100 [thread overview]
Message-ID: <yw1xhdz9xrtg.fsf@ford.guide> (raw)
In-Reply-To: yw1xptdy15hu.fsf@ford.guide
mru@kth.se (Måns Rullgård) writes:
> I just set up a largish (~100 GB) RAID1 array under Linux 2.6.0. Now,
> /proc/mdstat is happily telling me that the resync will be completed
> in 3700 minutes. This seems terribly slow to me. At first, it
> wouldn't work at all, complaining about "bio too big", so I changed
> RESYNC_BLOCK_SIZE to 32k.
I found it. It's a raid1 on top of raid0. Apparently the raid1
resync considered the I/O from the raid0 devices to the physical disks
as normal I/O and reduced the speed. I increased the min rate in
/proc/... and now it's resyncing at 40 MB/s. Much better.
--
Måns Rullgård
mru@kth.se
prev parent reply other threads:[~2004-01-06 11:03 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-01-05 20:54 RAID1 resync speed in 2.6.0 Måns Rullgård
2004-01-06 11:03 ` Måns Rullgård [this message]
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