Hi,
On 04/11/2017 02:07 PM, Ulrich Windl wrote:
Kyle O'Donnell <ky...@0b10.mx> schrieb am 10.04.2017 um 22:33 in Nachricht
<1870523950.17456.1491856403263.javamail.zim...@0b10.mx>:
Hello,
Just opened what I think is a bug with the Ubuntu util-linux package:
https://bugs.launchpad.net/ubuntu/+source/util-linux/+bug/1681410
TL;DR
The 'fstrim' command is run weekly on all filesystems. If you're using
ocfs2 and the same filesystem is mounted on multiple Ubuntu 16.04 servers,
this fstrim is run at the same time to the same device from all servers. I'm
positive this is what's causing my filesystem corruption issues, which occurs
a minute or two after fstrim is scheduled to run.
Without knowing the details of fstrim I think with proper locking in place,
filesystem corruption should never occur. However if one node in OCFS allocated
the block that another node trims (the non-locking case), you will loose that
newly allocated block. I wonder whether fstrim can be used in cluster
filesystems.
Looks ocfs2 supports fstrim, according to this commit:
commit e80de36d8dbff216a384e9204e54d59deeadf344
Author: Tao Ma <boyu...@taobao.com>
Date: Mon May 23 10:36:43 2011 +0800
ocfs2: Add ocfs2_trim_fs for SSD trim support.
Add ocfs2_trim_fs to support trimming freed clusters in the
volume. A range will be given and all the freed clusters greater
than minlen will be discarded to the block layer.
Signed-off-by: Tao Ma <boyu...@taobao.com>
Signed-off-by: Joel Becker <jl...@evilplan.org>
If something goes wrong with it, I'd suggest open a BZ, or ask ocfs2 maillist
for help.
Eric
Regards,
Ulrich
-Kyle
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