From: Karsten Weiss <K.Weiss@science-computing.de>
To: linux-ext4@vger.kernel.org
Subject: Re: Bad ext4 sync performance on 16 TB GPT partition
Date: Fri, 26 Feb 2010 12:33:22 +0100 (CET) [thread overview]
Message-ID: <alpine.LNX.2.00.1002261228570.18232@wong.science-computing.de> (raw)
In-Reply-To: <alpine.LNX.2.00.1002260926140.18232@wong.science-computing.de>
On Fri, 26 Feb 2010, Karsten Weiss wrote:
> However, the sync performance is fine if we ...
>
> * use xfs or
> * disable the ext4 journal or
> * disable ext4 extents (but with enabled journal)
ext3 is okay, too:
# /usr/bin/time bash -c "dd if=/dev/zero of=/mnt/large/10GB_1 bs=1M count=10000 && sync"
10000+0 records in
10000+0 records out
10485760000 bytes (10 GB) copied, 39.7188 seconds, 264 MB/s
0.03user 21.00system 1:47.24elapsed 19%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+788minor)pagefaults 0swaps
Compare:
XFS: 57s
ext4: 7m26s
--
Karsten Weiss
next prev parent reply other threads:[~2010-02-26 11:33 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-02-26 10:18 Bad ext4 sync performance on 16 TB GPT partition Karsten Weiss
2010-02-26 11:33 ` Karsten Weiss [this message]
2010-02-26 11:46 ` Dmitry Monakhov
2010-02-26 15:47 ` Karsten Weiss
2010-02-26 17:49 ` Eric Sandeen
2010-03-01 8:57 ` Karsten Weiss
2010-03-01 16:22 ` Eric Sandeen
2010-03-12 11:37 ` Karsten Weiss
2010-03-12 15:20 ` Eric Sandeen
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