From: Theodore Tso <tytso@mit.edu>
To: Valerie Clement <valerie.clement@bull.net>
Cc: ext4 development <linux-ext4@vger.kernel.org>
Subject: Re: Large File Deletion Comparison (ext3, ext4, XFS)
Date: Fri, 27 Apr 2007 14:33:46 -0400 [thread overview]
Message-ID: <20070427183345.GJ24852@thunk.org> (raw)
In-Reply-To: <4631FD7F.9030008@bull.net>
On Fri, Apr 27, 2007 at 03:41:19PM +0200, Valerie Clement wrote:
> 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
> ------------------------------------------------------------
The metablockgroups feature should help the file fragmentation level
with extents. It's easy enough to enable this for ext4 (we just need
to remove some checks in ext4_check_descriptors), so we should just do
it.
- Ted
next prev parent reply other threads:[~2007-04-27 18:33 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-04-27 13:41 Large File Deletion Comparison (ext3, ext4, XFS) Valerie Clement
2007-04-27 18:33 ` Theodore Tso [this message]
2007-04-27 20:33 ` Andreas Dilger
2007-04-27 18:51 ` Alex Tomas
2007-04-27 20:38 ` Andreas Dilger
2007-04-27 20:48 ` Alex Tomas
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