From: "Stephen C. Tweedie" <sct@redhat.com>
To: Linus Torvalds <torvalds@transmeta.com>
Cc: Jeremy Hansen <jeremy@xxedgexx.com>,
Mike Black <mblack@csihq.com>,
Andre Hedrick <andre@linux-ide.org>,
Douglas Gilbert <dougg@torque.net>,
linux-kernel@vger.kernel.org
Subject: Re: scsi vs ide performance on fsync's
Date: Thu, 8 Mar 2001 11:06:20 +0000 [thread overview]
Message-ID: <20010308110620.A14121@redhat.com> (raw)
In-Reply-To: <Pine.LNX.4.33L2.0103071302140.30803-100000@srv2.ecropolis.com> <Pine.LNX.4.10.10103071034210.2784-100000@penguin.transmeta.com>
In-Reply-To: <Pine.LNX.4.10.10103071034210.2784-100000@penguin.transmeta.com>; from torvalds@transmeta.com on Wed, Mar 07, 2001 at 10:36:38AM -0800
Hi,
On Wed, Mar 07, 2001 at 10:36:38AM -0800, Linus Torvalds wrote:
> On Wed, 7 Mar 2001, Jeremy Hansen wrote:
> >
> > So in the meantime as this gets worked out on a lower level, we've decided
> > to take the fsync() out of berkeley db for mysql transaction logs and
> > mount the filesystem -o sync.
> >
> > Can anyone perhaps tell me why this may be a bad idea?
>
> - it doesn't help. The disk will _still_ do write buffering. It's the
> DISK, not the OS. It doesn't matter what you do.
> - your performance will suck.
Added to which, "-o sync" only enables sync metadata updates. It
still doesn't force an fsync on data writes.
--Stephen
next prev parent reply other threads:[~2001-03-08 11:10 UTC|newest]
Thread overview: 64+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-03-06 5:27 scsi vs ide performance on fsync's Douglas Gilbert
2001-03-06 5:45 ` Linus Torvalds
2001-03-06 7:12 ` Andre Hedrick
2001-03-06 12:09 ` Alan Cox
2001-03-06 18:44 ` Linus Torvalds
2001-03-07 13:48 ` Stephen C. Tweedie
2001-03-07 14:13 ` Jens Axboe
2001-03-12 18:50 ` Andre Hedrick
2001-03-06 13:50 ` Mike Black
2001-03-06 16:02 ` Jeremy Hansen
2001-03-07 18:27 ` Jeremy Hansen
2001-03-07 18:36 ` Linus Torvalds
2001-03-08 11:06 ` Stephen C. Tweedie [this message]
2001-03-06 16:57 ` Jonathan Morton
2001-03-06 6:43 ` Jonathan Morton
2001-03-06 13:03 ` dean gaudet
2001-03-06 13:15 ` dean gaudet
2001-03-06 13:45 ` Jonathan Morton
[not found] <1epyyz1.etswlv1kmicnqM%smurf@noris.de>
2001-03-09 6:59 ` Matthias Urlichs
2001-03-09 11:51 ` Jens Axboe
2001-03-09 14:26 ` Matthias Urlichs
-- strict thread matches above, loose matches on Subject: below --
2001-03-07 12:47 David Balazic
2001-03-06 19:42 David Balazic
2001-03-06 20:37 ` Jens Axboe
2001-03-07 13:51 ` Stephen C. Tweedie
2001-03-07 14:12 ` Jens Axboe
2001-03-07 15:05 ` Stephen C. Tweedie
2001-03-07 18:51 ` Jens Axboe
2001-03-07 19:10 ` Stephen C. Tweedie
2001-03-07 20:15 ` Jens Axboe
2001-03-07 20:56 ` Stephen C. Tweedie
2001-03-07 20:59 ` Jens Axboe
2001-03-08 15:45 ` Chris Mason
2001-03-06 17:14 David Balazic
2001-03-06 17:46 ` Gregory Maxwell
2001-03-06 18:23 ` Jonathan Morton
2001-03-06 23:27 ` Mark Hahn
[not found] <Pine.LNX.4.33L2.0103021033190.6176-200000@srv2.ecropolis.com>
[not found] ` <054201c0a33d$55ee5870$e1de11cc@csihq.com>
2001-03-04 20:10 ` Douglas Gilbert
2001-03-04 21:28 ` Ishikawa
2001-03-06 0:11 ` Douglas Gilbert
2001-03-02 17:42 Jeremy Hansen
2001-03-02 18:39 ` Steve Lord
2001-03-02 19:17 ` Chris Mason
2001-03-02 19:25 ` Steve Lord
2001-03-02 19:27 ` Jeremy Hansen
2001-03-02 19:38 ` Chris Mason
2001-03-02 19:41 ` Steve Lord
2001-03-05 13:23 ` Andi Kleen
2001-03-02 19:25 ` Andre Hedrick
2001-03-03 1:55 ` Dan Hollis
2001-03-02 20:56 ` Linus Torvalds
2001-03-06 2:13 ` Jeremy Hansen
2001-03-06 2:25 ` Linus Torvalds
2001-03-06 3:30 ` Jonathan Morton
2001-03-06 4:05 ` Linus Torvalds
2001-03-06 7:03 ` Andre Hedrick
2001-03-06 8:24 ` Jonathan Morton
2001-03-06 12:22 ` Rik van Riel
2001-03-06 14:08 ` Jonathan Morton
2001-03-07 16:50 ` Pavel Machek
2001-03-06 19:41 ` Andre Hedrick
2001-03-07 5:25 ` Jonathan Morton
2001-03-07 6:58 ` Andre Hedrick
2001-03-09 11:39 ` Jonathan Morton
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