From: David Newall <davidn@davidnewall.com>
To: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Jeff Garzik <jeff@garzik.org>,
linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org,
Akira Fujita <a-fujita@rs.jp.nec.com>
Subject: Re: defrag deployment status (was Re: [PATCH] ext4: allow defrag (EXT4_IOC_MOVE_EXT) in 32bit compat mode)
Date: Tue, 09 Mar 2010 02:03:46 +1030 [thread overview]
Message-ID: <4B9518DA.8010201@davidnewall.com> (raw)
In-Reply-To: <201003080853.42978.borntraeger@de.ibm.com>
Christian Borntraeger wrote:
> Some bigger things are missing in the e4defrag tool:
> ...
> - overall layout considerations (e.g. putting files close to its directory or
> use the atime to move often used files to the beginning of a disk etc.)
Shouldn't oft-used files be placed closer to the middle? If you place
them at the beginning of the file, it's only possible for the head-stack
to be close to the file from the inner direction. Place them in the
middle and it's possible for the head-stack to be close from the outer
direction, too, which sounds like a doubling of probability. It seems
that it's the least frequently used files that should be placed at one
end of the disk or the other.
next prev parent reply other threads:[~2010-03-08 15:33 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-07 20:32 [PATCH] ext4: allow defrag (EXT4_IOC_MOVE_EXT) in 32bit compat mode Christian Borntraeger
2010-03-07 23:27 ` defrag deployment status (was Re: [PATCH] ext4: allow defrag (EXT4_IOC_MOVE_EXT) in 32bit compat mode) Jeff Garzik
2010-03-08 5:43 ` Eric Sandeen
2010-03-08 7:53 ` Christian Borntraeger
2010-03-08 7:53 ` Christian Borntraeger
2010-03-08 15:33 ` David Newall [this message]
2010-03-08 16:00 ` Christian Borntraeger
2010-03-08 16:00 ` Christian Borntraeger
2010-03-08 16:22 ` jim owens
2010-03-08 16:31 ` Greg Freemyer
2010-03-08 16:31 ` Greg Freemyer
2010-03-08 17:11 ` jim owens
2010-03-09 13:23 ` jim owens
2010-03-08 19:38 ` Valdis.Kletnieks
2010-03-08 20:48 ` jim owens
2010-03-09 16:19 ` David Newall
2010-03-08 5:47 ` [PATCH] ext4: allow defrag (EXT4_IOC_MOVE_EXT) in 32bit compat mode Eric Sandeen
2010-03-08 8:42 ` Akira Fujita
2010-03-12 7:01 ` [PATCH resend] " Christian Borntraeger
2010-04-02 21:48 ` [PATCH] " tytso
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