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Message-ID: <4631FD7F.9030008@bull.net>
Date: Fri, 27 Apr 2007 15:41:19 +0200
From: Valerie Clement <valerie.clement@...l.net>
To: ext4 development <linux-ext4@...r.kernel.org>
Subject: Large File Deletion Comparison (ext3, ext4, XFS)
As asked by Alex, I included in the test results the file fragmentation
level and the number of I/Os done during the file deletion.
Here are the results obtained with a not very fragmented 100-GB file:
| ext3 ext4 + extents xfs
------------------------------------------------------------
nb of fragments | 796 798 15
elapsed time | 2m0.306s 0m11.127s 0m0.553s
|
blks read | 206600 6416 352
blks written | 13592 13064 104
------------------------------------------------------------
And with a more fragmented 100-GB file:
| ext3 ext4 + extents xfs
------------------------------------------------------------
nb of fragments | 20297 19841 234
elapsed time | 2m18.914s 0m27.429s 0m0.892s
|
blks read | 225624 25432 592
blks written | 52120 50664 872
------------------------------------------------------------
More details on our web site:
http://www.bullopensource.org/ext4/20070404/FileDeletion.html
Valérie
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