From: Phillip Susi <psusi@cfl.rr.com>
To: Theodore Tso <tytso@mit.edu>
Cc: "Jörn Engel" <joern@logfs.org>,
"Matthew Wilcox" <willy@linux.intel.com>,
"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: Sat, 24 Apr 2010 13:11:57 -0400 [thread overview]
Message-ID: <1272129117.2093.5.camel@faldara> (raw)
In-Reply-To: <20090511120936.GB6277@mit.edu>
On Mon, 2009-05-11 at 08:09 -0400, Theodore Tso wrote:
> I just did a bit more web browsing, and it appears that OCZ's
> userspace support for trim is currently Windows-only, and they've
> implemented it by taking the filesystme off line, and running a
> userspace utility that sends TRIM requests for all of the free space
> on the drive.
Recent releases of hdparm also support sending down TRIM commands and
have a script that maps the unused blocks of the fs to trim them.
Someone even posted a gui on the ocz forums that monitors the amount of
data written to the fs since the last trim and reminds you to run
another pass. The script can trim the fs while it is online by creating
a large temporary file to occupy the remaining free space, mapping the
blocks it is allocated, and trimming those.
next prev parent reply other threads:[~2010-04-24 17:11 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 [this message]
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
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