From: Jeff Garzik <jgarzik@pobox.com>
To: Richard Scobie <richard@sauce.co.nz>
Cc: linux-raid@vger.kernel.org
Subject: Re: Life's too short ...(Raid 1 sync times)
Date: Sun, 29 Feb 2004 14:40:13 -0500 [thread overview]
Message-ID: <4042401D.9010606@pobox.com> (raw)
In-Reply-To: <40423D29.1050401@sauce.co.nz>
Richard Scobie wrote:
> 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?
>
> The RAID 5 took 70 minutes and was allowed up 100MB/s of idle IO
> bandwidth - RAID 1 seems to use < 200kB/s.
>
> While I am very pleased with the hardware RAID 10 result (98261kB write,
> 97148kB read), I would prefer to use software RAID 10 for a few reasons,
> if the performance is similar.
The resync speed defaults to "nice and slow" IIRC... There should be
some procfs tunable to increase the resync speed...
Jeff
next prev parent reply other threads:[~2004-02-29 19:40 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 [this message]
2004-02-29 20:47 ` Gordon Henderson
2004-02-29 21:29 ` Måns Rullgård
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4042401D.9010606@pobox.com \
--to=jgarzik@pobox.com \
--cc=linux-raid@vger.kernel.org \
--cc=richard@sauce.co.nz \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox