From: Florian Weimer <fweimer@bfk.de>
To: Matthew Wilcox <willy@linux.intel.com>
Cc: Chris Mason <chris.mason@oracle.com>,
Theodore Tso <tytso@mit.edu>, Jens Axboe <jens.axboe@oracle.com>,
Ric Wheeler <rwheeler@redhat.com>,
linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org
Subject: Re: Is TRIM/DISCARD going to be a performance problem?
Date: Fri, 29 May 2009 12:52:21 +0200 [thread overview]
Message-ID: <82k540dvve.fsf@mid.bfk.de> (raw)
In-Reply-To: <20090511184323.GA16885@linux.intel.com> (Matthew Wilcox's message of "Mon\, 11 May 2009 11\:43\:23 -0700")
* Matthew Wilcox:
> Actually, that's the exact opposite of what you want. You want to try
> to reuse blocks that are scheduled for trimming so that we never have to
> send the command at all.
I thought that the device would receive as many TRIM commands as
possible, to aid its internal reorganization process? A write which
overwrites a whole block could be equivalent, but it may not be a good
idea to artificially increase I/O traffic to turn partial writes to
unused blocks into full-block writes.
--
Florian Weimer <fweimer@bfk.de>
BFK edv-consulting GmbH http://www.bfk.de/
Kriegsstraße 100 tel: +49-721-96201-1
D-76133 Karlsruhe fax: +49-721-96201-99
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prev parent reply other threads:[~2009-05-29 10:52 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-09 21:14 Is TRIM/DISCARD going to be a performance problem? Theodore Ts'o
2009-05-10 16:53 ` Jörn Engel
2009-05-11 8:37 ` Theodore Tso
2009-05-11 10:06 ` Jörn Engel
2009-05-11 10:18 ` Jens Axboe
2009-05-11 15:43 ` Jeff Garzik
2009-05-11 11:27 ` Theodore Tso
2009-05-11 12:09 ` Theodore Tso
2009-05-11 13:10 ` Greg Freemyer
2009-05-11 13:39 ` Matthew Wilcox
2009-05-11 14:27 ` Theodore Tso
2009-05-11 14:29 ` Ric Wheeler
2009-05-11 14:50 ` Theodore Tso
2009-05-11 14:58 ` Ric Wheeler
2009-05-11 15:00 ` Matthew Wilcox
2009-05-11 18:47 ` Greg Freemyer
2009-05-11 19:22 ` Andreas Dilger
2009-05-11 23:38 ` Neil Brown
2009-05-12 13:28 ` Greg Freemyer
2009-05-11 13:15 ` Ric Wheeler
2010-04-24 17:11 ` Phillip Susi
2009-05-11 12:43 ` Jörn Engel
2009-05-11 12:48 ` Matthew Wilcox
[not found] ` <f3177b9e0905111433i40e41c90r920d7ccf36442ffd@mail.gmail.com>
2009-05-11 22:03 ` Chris Worley
2009-05-11 16:30 ` Chris Worley
2009-05-11 8:12 ` Jens Axboe
2009-05-11 8:41 ` Theodore Tso
2009-05-11 8:49 ` Jens Axboe
2009-05-11 17:18 ` Chris Mason
2009-05-11 18:43 ` Matthew Wilcox
2009-05-11 18:53 ` Chris Mason
2009-05-11 19:19 ` Theodore Tso
2009-05-29 10:52 ` Florian Weimer [this message]
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