On Fri, 17 Apr 2009, Eric Sandeen wrote:
Jeremy Sanders wrote:
Theodore Tso wrote:
...
I see from the dumpe2fs that you sent it had only been in use for a
week. How were you using the filesystem? Did you try using the
online resize feature at any time?
No. The filesystem was used to store rsync snapshots of other file systems
(using the hard link feature). I had only rsynced the initial data and run a
couple of rsync backups on to it. The filesystem was created using:
mkfs.ext4 -m0 -b 4096 -E stride=8,stripe-width=72 /dev/md0
Can you show us exactly how you're using rsync? is this with
rdiff-backup or some similar tool?
No, plain rsync. We have a script which does something like
rsync -raHSx --stats --while-file --numeric-ids \
--link-dest=/mnt/username/20090418/ host:/data/username/ \
/mnt/username/20090419/
for a set of users.
This command copies the files from /data/username on host to
/mnt/username/20090419, but creates hard links to the previous copy
(/mnt/username/20090418/) for unchanged files.
It worked fine on ext3, at least for a 2.4TB device.
Jeremy
--
Jeremy Sanders <jss@xxxxxxxxxxxxx> http://www-xray.ast.cam.ac.uk/~jss/
X-Ray Group, Institute of Astronomy, University of Cambridge, UK.
Public Key Server PGP Key ID: E1AAE053
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