From: BJ Quinn <bj@placs.net>
To: Chris Mason <chris.mason@oracle.com>
Cc: Jan Schmidt <list.btrfs@jan-o-sch.net>,
Phillip Susi <psusi@cfl.rr.com>, Freddie Cash <fjwcash@gmail.com>,
linux-btrfs@vger.kernel.org
Subject: Re: Cloning a Btrfs partition
Date: Wed, 11 Jan 2012 18:52:04 -0600 (CST) [thread overview]
Message-ID: <c137d5af-bc20-41e4-95b3-480439c0e6b8@mail.placs.net> (raw)
In-Reply-To: <f246b736-54be-46d6-8944-701f3bd70c68@mail.placs.net>
Now I've managed to basically bring my system to its knees. My rsync script that takes weeks ends up bringing the system to a crawl long before it can ever finish. I end up with 100% of the CPU used up by the following as shown by top
btrfs-endio-wri
btrfs-delayed-m
btrfs-transacti
btrfs-delalloc-
btrfs-endio-met
Now, I've got a bunch of snapshots, and the server is a backup server that backs up all the machines on the network. It's using -o compress. I've got a 6TB array of 2 3TB drives, that is now about 85% full. There's lots of small files. I tried to add another drive, but it won't ever finish a rebalance. Df shows all 9TB as part of the array, but only shows available space as if the array was 6TB. An attempt at copying all the data to a second array effectively brings the computer to its knees running the threads explained above. The server never really recovers until a hard reboot and can't ever finish running a backup.
Are there any mount options I should change? I need the compression and snapshots to have enough space.
-BJ
next prev parent reply other threads:[~2012-01-12 0:52 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <bb747e0c-d6d8-4f60-a3f6-cf64c856515e@mail.placs.net>
2011-12-07 18:35 ` Cloning a Btrfs partition BJ Quinn
2011-12-07 18:39 ` Freddie Cash
2011-12-07 18:49 ` BJ Quinn
2011-12-08 15:49 ` Phillip Susi
2011-12-08 16:07 ` BJ Quinn
2011-12-08 16:09 ` Jan Schmidt
2011-12-08 16:28 ` BJ Quinn
2011-12-08 16:41 ` Jan Schmidt
2011-12-08 19:56 ` BJ Quinn
2011-12-08 20:05 ` Chris Mason
2011-12-08 20:38 ` BJ Quinn
2011-12-12 21:41 ` BJ Quinn
2011-12-13 22:06 ` Goffredo Baroncelli
2011-12-30 0:25 ` BJ Quinn
2012-01-12 0:52 ` BJ Quinn [this message]
2012-01-12 6:41 ` Chris Samuel
2011-12-08 16:27 ` Stephane CHAZELAS
2011-12-08 10:00 ` Stephane CHAZELAS
2011-12-08 19:22 ` Goffredo Baroncelli
2013-07-29 8:21 Fwd: " Jan Schmidt
2013-07-29 15:32 ` BJ Quinn
2013-07-30 10:28 ` Jan Schmidt
2013-08-19 20:45 ` BJ Quinn
2013-08-20 9:59 ` Xavier Bassery
2013-08-20 15:43 ` BJ Quinn
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