From: Xavier Bestel <xavier.bestel@free.fr>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Andrew Morton <akpm@zip.com.au>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: File System Performance
Date: 12 Nov 2001 23:39:52 +0100 [thread overview]
Message-ID: <1005604793.17560.2.camel@nomade> (raw)
In-Reply-To: <E163PjZ-0007NZ-00@the-village.bc.nu>
In-Reply-To: <E163PjZ-0007NZ-00@the-village.bc.nu>
le lun 12-11-2001 à 23:39, Alan Cox a écrit :
> > Corrections to speed-up the sizeing pass in Amanda:
> > * tar.h: Declare dev_null_output.
> > * buffer.c (open_archive): Detect when archive is /dev/null.
> > (flush_write): Avoid writing to /dev/null.
> > * create.c (dump_file): Do not open file if archive is being
> > written to /dev/null, nor read file nor restore times.
> > Reported by Greg Maples and Tor Lillqvist.
> >
> > One wonders why.
>
> So when you archive the file set twice (once to compute its size) its
> faster. Seems sane enough.
What would have been sane is a tar --just-compute-the-size option, not
hardcoding /dev/null.
next prev parent reply other threads:[~2001-11-12 22:46 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-11-12 13:54 File System Performance Ben Israel
2001-11-12 16:33 ` Andrew Morton
2001-11-12 17:50 ` Ben Israel
2001-11-12 19:46 ` Andrew Morton
2001-11-12 19:59 ` Richard Gooch
2001-11-12 23:07 ` Mike Fedyk
2001-11-13 0:04 ` Richard Gooch
2001-11-13 0:08 ` Mike Fedyk
2001-11-13 0:26 ` Richard Gooch
2001-11-13 0:47 ` Mike Castle
2001-11-13 1:28 ` Mike Fedyk
2001-11-13 6:34 ` Richard Gooch
2001-11-13 20:56 ` Andreas Dilger
2001-11-13 7:45 ` Andreas Dilger
2001-11-12 20:06 ` Steve Lord
2001-11-12 20:41 ` Andrew Morton
2001-11-12 21:27 ` Steve Lord
2001-11-12 21:43 ` Andrew Morton
2001-11-12 21:45 ` Steve Lord
2001-11-12 21:48 ` Linus Torvalds
2001-11-12 22:11 ` Lionel Bouton
2001-11-12 19:41 ` Gérard Roudier
2001-11-12 22:14 ` Linus Torvalds
2001-11-12 22:30 ` Ragnar Kjørstad
2001-11-12 22:36 ` Andrew Morton
2001-11-12 23:04 ` Mike Castle
2001-11-13 9:56 ` Peter Wächtler
2001-11-13 9:41 ` Henning P. Schmiedehausen
2001-11-12 22:16 ` Andrew Morton
2001-11-12 22:26 ` Steve Lord
2001-11-12 22:32 ` Lionel Bouton
2001-11-12 22:45 ` Alan Cox
2001-11-12 22:39 ` Alan Cox
2001-11-12 22:39 ` Xavier Bestel [this message]
2001-11-12 22:46 ` Mike Castle
2001-11-12 21:53 ` Lionel Bouton
2001-11-13 0:17 ` Andreas Dilger
2001-11-13 0:40 ` Peter J . Braam
2001-11-13 20:46 ` Andreas Dilger
2001-11-16 22:07 ` Peter J . Braam
2001-11-16 23:14 ` Mike Fedyk
2001-11-12 16:40 ` Ben Israel
2001-11-12 17:29 ` Andrew Morton
-- strict thread matches above, loose matches on Subject: below --
2001-11-12 22:36 Grant Erickson
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