From: "Jörg Sommer" <joerg@alea.gnuu.de>
To: Andreas Philipp <philipp.andreas@gmail.com>
Cc: linux-btrfs@vger.kernel.org
Subject: Re: btrfs reads only 4k blocks -- how to improve?
Date: Fri, 17 Dec 2010 01:32:24 +0100 [thread overview]
Message-ID: <20101217003224.GA6615@alea.gnuu.de> (raw)
In-Reply-To: <4D0A0E2E.5010204@gmail.com>
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Andreas Philipp hat am Thu 16. Dec, 14:03 (+0100) geschrieben:
> On 16.12.2010 13:31, Jörg Sommer wrote:
> > When running rm -r to remove an old backup or running rsync I see the
> > average size of a read or a write request ist 4k. This leads to a very
> > bad throughput of fewer than 2MByte/s. I'm using atop to watch these
> > numbers.
> Just one probably easy question. Are you sure your partition(s) are
> aligned correctly with respect to the 4k blocks of your drive?
Good idea, but I don't use partitions on this drive.
# file -s /dev/sdb
/dev/sdb: BTRFS Filesystem (label "Backup", sectorsize 4096, nodesize 4096, leafsize 4096)
Bye, Jörg.
--
Je planmäßiger ein Mensch vorgeht,
desto stärker mag ihn der Zufall treffen.
Erich Krunau ‚Die Physiker‘
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prev parent reply other threads:[~2010-12-17 0:32 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-12-16 12:31 btrfs reads only 4k blocks -- how to improve? Jörg Sommer
2010-12-16 22:12 ` Erik Logtenberg
[not found] ` <4D0A0E2E.5010204@gmail.com>
2010-12-17 0:32 ` Jörg Sommer [this message]
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