From: Brian Strand <bstrand@switchmanagement.com>
To: linux-kernel@vger.kernel.org
Subject: Suse 2.4.16 LVM hangs with multiple snapshots of the same LV
Date: Fri, 15 Mar 2002 18:07:04 -0800 [thread overview]
Message-ID: <3C92A8C8.7020000@switchmanagement.com> (raw)
I have a single-processor ppro200 with 96M memory running Suse's 2.4.16
kernel (k_deflt-2.4.16-22). I am creating and mounting many (like 8-10)
snapshots of the same logical volume over a week or so (a poor man's
nightly backup, if you will). The write activity on the source logical
volume is limited to a brief period once per day, starting at 23:20; at
all other times the source logical volume is mounted read-only. The
snapshot logs grow to about 3GB per snapshot volume before the oldest
snapshot is removed. So far, so good.
Unfortunately, the box falls over every few days doing this; it has
lasted anywhere from 1 day to over 1 week. Also, memtest completes one
pass with 0 errors. I got the following in the syslog before the latest
hang:
Mar 11 23:24:12 dailies kernel: clm-2100: nesting info a different FS
Mar 11 23:24:44 dailies last message repeated 15 times
Mar 11 23:25:46 dailies last message repeated 94 times
Mar 11 23:26:48 dailies last message repeated 38 times
Mar 11 23:26:50 dailies last message repeated 2 times
Mar 11 23:37:35 dailies kernel: clm-2100: nesting info a different FS
Mar 11 23:38:27 dailies last message repeated 16 times
Mar 11 23:39:28 dailies last message repeated 33 times
Mar 11 23:40:01 dailies last message repeated 27 times
Mar 11 23:40:03 dailies kernel: clm-2100: nesting info a different FS
Mar 11 23:40:34 dailies last message repeated 22 times
Mar 11 23:41:35 dailies last message repeated 42 times
Mar 11 23:42:32 dailies last message repeated 72 times
Mar 11 23:44:22 dailies kernel: clm-2100: nesting info a different FS
Mar 11 23:45:23 dailies last message repeated 57 times
Mar 11 23:46:27 dailies last message repeated 31 times
Mar 11 23:47:28 dailies last message repeated 53 times
Mar 11 23:48:26 dailies last message repeated 81 times
Mar 11 23:49:27 dailies last message repeated 48 times
Is what I'm doing with the multiple snapshots supported and/or sane? I
found very little information in the various LVM howtos, Sistina, and
google on creating multiple snapshots from a single LV.
Regards,
Brian
reply other threads:[~2002-03-16 2:07 UTC|newest]
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