From: Valerie Clement <valerie.clement@bull.net>
To: Alex Tomas <alex@clusterfs.com>
Cc: Avantika Mathur <mathur@linux.vnet.ibm.com>,
linux-ext4@vger.kernel.org, Mingming Cao <cmm@us.ibm.com>
Subject: Re: Ext4 devel interlock meeting minutes (April 23, 2007)
Date: Tue, 24 Apr 2007 16:04:10 +0200 [thread overview]
Message-ID: <462E0E5A.6030707@bull.net> (raw)
In-Reply-To: <462D9CE9.1040402@clusterfs.com>
Alex Tomas wrote:
>> - Large file deletion
>> - Valerie had recently tested large file deletion on ext3/4, but
>> did not see the expected performance gain with ext4 due to compact
>> metadata when using extents.
>
> any details?
>
Ok, I found my mistake. There was a typo in my test script and the
pagecache was not flushed between the file creation and the deletion.
Here are the results I obtain with a 2.6.17-rc7 kernel to delete a 100GB
file:
ext3 : real 2m35.048s user 0m0.000s sys 0m6.424s
ext4 : real 0m11.160s user 0m0.000s sys 0m5.532s
xfs : real 0m0.377s user 0m0.004s sys 0m0.004s
The performance gain with ext4 is much larger when running a good test...
Sorry the wrong information,
Valérie
next prev parent reply other threads:[~2007-04-24 14:05 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-04-23 23:35 Ext4 devel interlock meeting minutes (April 23, 2007) Avantika Mathur
2007-04-24 6:00 ` Alex Tomas
2007-04-24 14:04 ` Valerie Clement [this message]
2007-04-24 14:21 ` Alex Tomas
2007-04-24 14:51 ` Valerie Clement
2007-04-24 14:27 ` Eric Sandeen
2007-04-30 11:06 ` Aneesh Kumar
2007-04-30 11:13 ` Alex Tomas
2007-05-01 12:08 ` Kalpak Shah
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