From: Witold Krecicki <adasi@kernel.pl>
To: jw schultz <jw@pegasys.ws>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: raid0 slower than devices it is assembled of?
Date: Tue, 16 Dec 2003 21:09:36 +0100 [thread overview]
Message-ID: <200312162109.36672.adasi@kernel.pl> (raw)
In-Reply-To: <20031216040156.GJ12726@pegasys.ws>
Dnia Tuesday 16 of December 2003 05:01, jw schultz napisał:
> No Linux [R]AID improves sequential performance. How would
> reading 65KB from two disks in alternation be faster than
> reading continuously from one disk?
Well, but at the beginning I've got about 85-90MB/sec for buffered array
reads. That was on 2.4.21-pre or even patched 2.4.20 (on siimage - in it's
early stages, not sata_sil driver). Now it's 3 times slower (checkedwith
preemptible kernel, it's even slower) - so something went bad.
--
Witold Kręcicki (adasi) adasi [at] culm.net
GPG key: 7AE20871
http://www.culm.net
next prev parent reply other threads:[~2003-12-16 20:09 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-12-15 13:34 raid0 slower than devices it is assembled of? Witold Krecicki
2003-12-15 15:44 ` Witold Krecicki
2003-12-16 4:01 ` jw schultz
2003-12-16 14:51 ` Helge Hafting
2003-12-16 16:42 ` Linus Torvalds
2003-12-16 20:58 ` Mike Fedyk
2003-12-16 21:11 ` Linus Torvalds
2003-12-17 10:53 ` Jörn Engel
2003-12-17 11:39 ` Peter Zaitsev
2003-12-17 16:01 ` Linus Torvalds
2003-12-17 18:37 ` Mike Fedyk
2003-12-17 21:55 ` bill davidsen
2003-12-17 17:02 ` bill davidsen
2003-12-17 20:14 ` Peter Zaitsev
2003-12-17 19:22 ` Jamie Lokier
2003-12-17 19:40 ` Linus Torvalds
2003-12-17 22:36 ` bill davidsen
2003-12-18 2:47 ` jw schultz
2003-12-17 22:29 ` bill davidsen
2003-12-18 2:18 ` jw schultz
2004-01-08 4:54 ` Greg Stark
2003-12-16 20:51 ` Andre Hedrick
2003-12-16 21:04 ` Andre Hedrick
2003-12-16 21:46 ` Witold Krecicki
2003-12-16 20:09 ` Witold Krecicki [this message]
2003-12-16 21:11 ` Adam Kropelin
2003-12-16 21:25 ` jw schultz
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