From: Michael Monnerie <michael.monnerie@is.it-management.at>
To: xfs@oss.sgi.com
Cc: Cory Coager <ccoager@davisvision.com>,
Stan Hoeppner <stan@hardwarefreak.com>
Subject: Re: extremely slow write performance plaintext
Date: Tue, 25 Jan 2011 07:21:09 +0100 [thread overview]
Message-ID: <201101250721.14716@zmi.at> (raw)
In-Reply-To: <1779_1295360207_4D35A0CF_1779_747_1_4D35A0CF.9050503@davisvision.com>
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On Dienstag, 18. Januar 2011 Cory Coager wrote:
> Also, I want to stress that I am only having performance issues with
> one logical volume, the others seem fine.
You're getting 40MB/s write speed and says that's fine? I get more
performance from a single SATA desktop drive. Your setup seems to suck
extremely somewhere.
It already starts with your dd speed. I started it on a virtualized VM
on an old, overloaded server and get:
# dd if=/dev/zero of=test.dd bs=1k count=1M
1048576+0 Datensätze ein
1048576+0 Datensätze aus
1073741824 Bytes (1,1 GB) kopiert, 10,9992 s, 97,6 MB/s
This is a hardware RAID 6 with just 8x 10krpm WD SATA drives. Try to
look into general I/O problems. Maybe you can try to boot from an actual
linux CD with kernel >2.6.30 to see if that helps performance.
Maybe one or more disks in your array are dead and the controller is
crying for replacement?
--
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Michael Monnerie, Ing. BSc
it-management Internet Services: Protéger
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next prev parent reply other threads:[~2011-01-25 6:18 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-13 21:22 extremely slow write performance plaintext Cory Coager
2011-01-13 22:35 ` Emmanuel Florac
2011-01-14 0:17 ` Cory Coager
2011-01-14 19:51 ` Stan Hoeppner
2011-01-14 20:48 ` Cory Coager
2011-01-14 22:02 ` Stan Hoeppner
2011-01-18 14:16 ` Cory Coager
2011-01-19 9:59 ` Stan Hoeppner
2011-01-25 14:22 ` Cory Coager
2011-01-25 6:21 ` Michael Monnerie [this message]
2011-01-25 9:48 ` Mathieu AVILA
2011-01-25 14:25 ` Cory Coager
2011-01-28 6:22 ` Michael Monnerie
2011-01-28 13:08 ` Cory Coager
2011-01-25 14:27 ` Cory Coager
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