From: Zheng Liu <gnehzuil.liu@gmail.com>
To: Eric Sandeen <sandeen@redhat.com>
Cc: Theodore Ts'o <tytso@mit.edu>, Fredrick <fjohnber@zoho.com>,
Ric Wheeler <rwheeler@redhat.com>,
linux-ext4@vger.kernel.org, Andreas Dilger <adilger@dilger.ca>,
wenqing.lz@taobao.com
Subject: Re: ext4_fallocate
Date: Mon, 2 Jul 2012 11:16:11 +0800 [thread overview]
Message-ID: <20120702031611.GB2406@gmail.com> (raw)
In-Reply-To: <4FEB9115.6090309@redhat.com>
On Wed, Jun 27, 2012 at 07:02:45PM -0400, Eric Sandeen wrote:
> On 6/27/12 3:30 PM, Theodore Ts'o wrote:
> > A better workload would be to use a blocksize of 4k. By using a
> > blocksize of 1024k, it's not surprising that the metadata overhead is
> > in the noise.
> >
> > Try something like this; this will cause the extent tree overhead to
> > be roughly equal to the data block I/O.
> >
> > [global]
> > rw=randwrite
> > size=128m
> > filesize=1g
> > bs=4k
> > ioengine=sync
> > fallocate=1
> > fsync=1
> >
> > [thread1]
> > filename=testfile
Hi Eric,
Could you please run this test with 'journal_async_commit' flag. In my
previous test, this feature can dramatically improve the performance of
uninitialized extent conversion.
I have sent an email to do a similar test [1]. In that email, I do a
similar test and the journal_async_commit flag quite can improve the
performance.
1. http://comments.gmane.org/gmane.linux.file-systems/63569
Regards,
Zheng
next prev parent reply other threads:[~2012-07-02 3:07 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-06-25 6:42 ext4_fallocate Fredrick
2012-06-25 7:33 ` ext4_fallocate Andreas Dilger
2012-06-28 15:12 ` ext4_fallocate Phillip Susi
2012-06-28 15:23 ` ext4_fallocate Eric Sandeen
2012-06-25 8:51 ` ext4_fallocate Zheng Liu
2012-06-25 19:04 ` ext4_fallocate Fredrick
2012-06-25 19:17 ` ext4_fallocate Theodore Ts'o
2012-06-26 1:23 ` ext4_fallocate Fredrick
2012-06-26 13:13 ` ext4_fallocate Ric Wheeler
2012-06-26 17:30 ` ext4_fallocate Theodore Ts'o
2012-06-26 18:06 ` ext4_fallocate Fredrick
2012-06-26 18:21 ` ext4_fallocate Ric Wheeler
2012-06-26 18:57 ` ext4_fallocate Ted Ts'o
2012-06-26 19:22 ` ext4_fallocate Ric Wheeler
2012-06-26 18:05 ` ext4_fallocate Fredrick
2012-06-26 18:59 ` ext4_fallocate Ted Ts'o
2012-06-26 19:30 ` ext4_fallocate Ric Wheeler
2012-06-26 19:57 ` ext4_fallocate Eric Sandeen
2012-06-26 20:44 ` ext4_fallocate Eric Sandeen
2012-06-27 15:14 ` ext4_fallocate Eric Sandeen
2012-06-27 19:30 ` ext4_fallocate Theodore Ts'o
2012-06-27 23:02 ` ext4_fallocate Eric Sandeen
2012-06-28 11:27 ` ext4_fallocate Ric Wheeler
2012-06-29 19:02 ` ext4_fallocate Andreas Dilger
2012-07-02 3:03 ` ext4_fallocate Zheng Liu
2012-06-28 12:48 ` ext4_fallocate Theodore Ts'o
2012-07-02 3:16 ` Zheng Liu [this message]
2012-07-02 16:33 ` ext4_fallocate Eric Sandeen
2012-07-02 17:44 ` ext4_fallocate Jan Kara
2012-07-02 17:48 ` ext4_fallocate Ric Wheeler
2012-07-03 17:41 ` ext4_fallocate Zheng Liu
2012-07-03 17:57 ` ext4_fallocate Zach Brown
2012-07-04 2:23 ` ext4_fallocate Zheng Liu
2012-07-02 18:01 ` ext4_fallocate Theodore Ts'o
2012-07-03 9:30 ` ext4_fallocate Jan Kara
2012-07-04 1:15 ` ext4_fallocate Phillip Susi
2012-07-04 2:36 ` ext4_fallocate Zheng Liu
2012-07-04 3:06 ` ext4_fallocate Phillip Susi
2012-07-04 3:48 ` ext4_fallocate Zheng Liu
2012-07-04 12:20 ` ext4_fallocate Ric Wheeler
2012-07-04 13:25 ` ext4_fallocate Zheng Liu
2012-06-26 13:06 ` ext4_fallocate Eric Sandeen
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