From: Peter Stuge <peter@stuge.se>
To: linux-btrfs <linux-btrfs@vger.kernel.org>
Subject: Re: abysmal performance
Date: Sun, 1 May 2011 01:55:39 +0200 [thread overview]
Message-ID: <20110430235539.6205.qmail@stuge.se> (raw)
In-Reply-To: <BANLkTi=6YHDSmcg5DiHPiL1xWdT1nWobBg@mail.gmail.com>
Mitch Harder wrote:
> To defragment your entire volume, you'll need a command like:
>
> # for file in $(find <PATH/TO/BTRFS/VOL/> -type f); do btrfs
> filesystem defragment ${file}; done
Suggest:
find /path/to/btrfs/vol -type f -exec btrfs filesystem defragment '{}' ';'
> If you just want to see your fragmentation you can use the 'filefrag'
> program from e2fsprogs:
>
> # for file in $(find <PATH/TO/BTRFS/VOL/> -type f); do filefrag
> ${file}; done | sort -n -k 2 | less
find /path/to/btrfs/vol -type f -exec filefrag '{}' ';'
If either command can take multiple filenames as parameters, then e.g.:
find /path/to/btrfs/vol -type f -execdir filefrag '+'
(significantly better because not a fork per file)
//Peter
next prev parent reply other threads:[~2011-04-30 23:55 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-29 14:46 abysmal performance John Wyzer
2011-04-29 15:01 ` Chris Mason
2011-04-30 17:33 ` Mitch Harder
2011-04-30 20:40 ` John Wyzer
2011-04-30 22:16 ` Mitch Harder
2011-04-30 22:33 ` John Wyzer
2011-05-03 11:05 ` Chris Mason
2011-05-03 11:06 ` Chris Mason
2011-04-30 23:55 ` Peter Stuge [this message]
2011-05-03 10:33 ` Bernhard Schmidt
2011-05-03 11:00 ` cwillu
2011-05-03 11:26 ` Bernhard Schmidt
2011-05-03 11:08 ` Chris Mason
2011-05-03 11:30 ` Bernhard Schmidt
2011-05-03 11:36 ` Chris Mason
2011-05-03 11:43 ` Bernhard Schmidt
2011-05-03 12:52 ` Chris Mason
2011-05-03 13:03 ` Bernhard Schmidt
2011-05-03 13:41 ` Mitch Harder
2011-05-03 14:41 ` Daniel J Blueman
2011-05-03 15:42 ` Mitch Harder
2011-05-03 16:51 ` Chris Mason
2011-05-03 14:54 ` Daniel J Blueman
2011-05-03 15:10 ` Bernhard Schmidt
[not found] ` <1304100271-sup-4177@localhost>
[not found] ` <1304100862-sup-1493@think>
[not found] ` <1304107977-sup-3815@localhost>
[not found] ` <1304110058-sup-7292@think>
[not found] ` <1304146193-sup-2200@localhost>
2011-04-30 20:51 ` John Wyzer
-- strict thread matches above, loose matches on Subject: below --
2011-06-20 21:51 Abysmal Performance Henning Rohlfs
2011-06-21 0:12 ` Josef Bacik
2011-06-21 7:10 ` Henning Rohlfs
2011-06-21 8:00 ` Sander
2011-06-21 9:26 ` Henning Rohlfs
2011-06-21 15:18 ` Josef Bacik
2011-06-21 16:55 ` Henning Rohlfs
2011-06-21 15:24 ` Calvin Walton
2011-06-22 14:15 ` Henning Rohlfs
2011-06-22 15:39 ` Josef Bacik
2011-06-22 15:57 ` Calvin Walton
2011-06-22 15:58 ` Josef Bacik
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