From: Chris Friesen <chris.friesen@genband.com>
To: Neil Brown <neilb@suse.de>, linux-raid@vger.kernel.org
Subject: RFC: use TRIM data from filesystems to speed up array rebuild?
Date: Tue, 04 Sep 2012 12:06:26 -0600 [thread overview]
Message-ID: <50464322.3010509@genband.com> (raw)
Hi,
I'm not really a filesystem guy so this may be a really dumb question.
We currently have an issue where we have a ~1TB RAID1 array that is
mostly given over to LVM. If we swap one of the disks it will rebuild
everything, even though we may only be using a small fraction of the space.
This got me thinking. Has anyone given thought to using the TRIM
information from filesystems to allow the RAID code to maintain a
bitmask of used disk blocks and only sync the ones that are actually used?
Presumably this bitmask would itself need to be stored on the disk.
Thanks,
Chris
--
Chris Friesen
Software Designer
3500 Carling Avenue
Ottawa, Ontario K2H 8E9
www.genband.com
next reply other threads:[~2012-09-04 18:06 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-04 18:06 Chris Friesen [this message]
2012-09-04 19:11 ` RFC: use TRIM data from filesystems to speed up array rebuild? Ric Wheeler
2012-09-04 20:24 ` NeilBrown
2012-09-04 22:59 ` Ric Wheeler
2012-09-06 17:17 ` Benjamin ESTRABAUD
2012-09-06 18:42 ` David Brown
2012-09-07 9:23 ` Benjamin ESTRABAUD
2012-09-04 20:21 ` NeilBrown
2012-09-04 20:28 ` Chris Friesen
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