From: Andrew Morton <akpm@zip.com.au>
To: Alexander Viro <viro@math.psu.edu>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>,
Linus Torvalds <torvalds@transmeta.com>,
linux-kernel@vger.kernel.org
Subject: Re: [Ext2-devel] disk throughput
Date: Tue, 06 Nov 2001 00:48:29 -0800 [thread overview]
Message-ID: <3BE7A3DD.D98400FB@zip.com.au> (raw)
In-Reply-To: <E1611lE-00086H-00@the-village.bc.nu> <Pine.GSO.4.21.0111060334590.27713-100000@weyl.math.psu.edu>
Alexander Viro wrote:
>
> On Tue, 6 Nov 2001, Alan Cox wrote:
>
> > Surely the answer if you want short term write speed and long term balancing
> > is to use ext3 not ext2 and simply ensure that the relevant stuff goes to
> > the journal (which will be nicely ordered) first. That will give you some
> > buffering at least.
>
> Alan, the problem is present in ext3 as well as in all other FFS derivatives
> (well, FreeBSD had tried to deal that stuff this Spring).
>
Yep. Once we're seek-bound on metadata and data, the occasional
seek-and-squirt into the journal won't make much difference, and
the other write patterns will be the same.
Interestingly, current ext3 can do a 600 meg write in fifty
seconds, whereas ext2 takes seventy. This will be related to the
fact that ext3 just pumps all the buffers into submit_bh(),
whereas ext2 fiddles around with all the write_locked_buffers()
stuff. I think. Or the intermingling of indirects with data
is tripping ext2 up. The additional seeking is audible.
-
next prev parent reply other threads:[~2001-11-06 8:54 UTC|newest]
Thread overview: 79+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-11-05 2:13 disk throughput Andrew Morton
2001-11-05 3:20 ` Mohammad A. Haque
2001-11-05 3:31 ` Andrew Morton
2001-11-05 3:32 ` [Ext2-devel] " Mike Fedyk
2001-11-05 3:45 ` Andrew Morton
2001-11-05 4:39 ` Mike Fedyk
2001-11-05 7:06 ` Jens Axboe
2001-11-05 7:14 ` Andrew Morton
2001-11-05 7:26 ` Jens Axboe
2001-11-05 7:14 ` Mike Fedyk
2001-11-05 7:18 ` Jens Axboe
2001-11-05 7:18 ` Jens Axboe
2001-11-05 9:14 ` Mike Fedyk
2001-11-05 9:20 ` Jens Axboe
2001-11-05 5:54 ` Albert D. Cahalan
2001-11-05 8:04 ` Andrew Morton
2001-11-05 12:28 ` Matthias Andree
2001-11-05 14:23 ` Alexander Viro
2001-11-05 22:22 ` Andrew Morton
2001-11-05 22:41 ` Andreas Dilger
2001-11-05 22:53 ` Andrew Morton
2001-11-08 15:28 ` Constantin Loizides
2001-11-05 23:14 ` Dan Hollis
2001-11-06 10:52 ` Daniel Phillips
2001-11-06 16:17 ` Jeremy Fitzhardinge
2001-11-08 15:24 ` Constantin Loizides
2001-11-08 16:46 ` Jeremy Fitzhardinge
2001-11-09 6:08 ` Andrew Morton
2001-11-09 8:49 ` Jeremy Fitzhardinge
2001-11-06 21:45 ` Stephen Tweedie
2001-11-05 20:16 ` Andreas Dilger
2001-11-05 20:28 ` m
2001-11-05 21:39 ` Andrew Morton
2001-11-05 22:59 ` Linus Torvalds
2001-11-05 23:36 ` Alexander Viro
2001-11-05 23:50 ` Linus Torvalds
2001-11-06 0:03 ` Linus Torvalds
2001-11-06 1:33 ` Alexander Viro
2001-11-06 2:10 ` Linus Torvalds
2001-11-06 3:02 ` Alexander Viro
2001-11-06 8:39 ` Alan Cox
2001-11-06 8:37 ` Alexander Viro
2001-11-06 8:48 ` Andrew Morton [this message]
2001-11-06 3:49 ` Alexander Viro
2001-11-06 4:01 ` Linus Torvalds
2001-11-06 4:21 ` Alexander Viro
2001-11-06 5:01 ` Linus Torvalds
2001-11-06 5:31 ` Andrew Morton
2001-11-06 5:48 ` Linus Torvalds
2001-11-06 7:34 ` Mike Castle
2001-11-06 7:10 ` Kai Henningsen
2001-11-09 22:35 ` Riley Williams
2001-11-06 1:28 ` Alexander Viro
2001-11-06 9:16 ` Wojtek Pilorz
2001-11-06 9:58 ` Alexander Viro
2001-11-08 12:51 ` Pavel Machek
2001-11-06 21:48 ` Stephen Tweedie
2001-11-06 23:17 ` ext2/ialloc.c cleanup Alexander Viro
2001-11-07 19:34 ` [Ext2-devel] " Andreas Dilger
2001-11-07 20:02 ` Alexander Viro
2001-11-08 2:06 ` Andrew Morton
2001-11-08 20:45 ` Andrew Morton
2001-11-08 22:16 ` Alexander Viro
2001-11-08 22:43 ` Andreas Dilger
2001-11-08 23:08 ` Alexander Viro
2001-11-09 6:15 ` Andrew Morton
2001-11-09 6:56 ` Andreas Dilger
2001-11-09 7:09 ` Andrew Morton
2001-11-09 7:12 ` Alexander Viro
2001-11-09 7:18 ` Andrew Morton
2001-11-05 9:45 ` [Ext2-devel] disk throughput Alex Bligh - linux-kernel
2001-11-05 9:58 ` Alex Bligh - linux-kernel
2001-11-05 8:47 ` Jan Kara
2001-11-05 8:50 ` [Ext2-devel] " Mike Fedyk
2001-11-05 9:01 ` Jan Kara
2001-11-05 12:23 ` Matthias Andree
2001-11-05 22:39 ` Andrew Morton
2001-11-05 23:41 ` Matthias Andree
-- strict thread matches above, loose matches on Subject: below --
2001-11-12 6:04 [Ext2-devel] " Yan, Noah
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