Rich schrieb:
i am not subscribed, so i would be thankful if i could get a reply with
cc. thanks.
i tried making snapshots of xfs filesystem on lvm2. if xfs was frozen,
lvcreate stopped at
Suspending space-data
dm suspend space-data N
issuing xfs_freeze -u allowed the process to continue.
in this list, Thu, 09 Jun 2005 Klaus Strebel wrote :
"with LVM2 the XFS filesystem is 'frozen' automaticly on the mount
-onouuid,ro ( not quite sure, but probably also for LVM1 ..., think it's
in the XFS code ).
So, forget xfs_freeze."
as i understand it, consistent copy is created when lvcreate is issued,
not when snapshot volume is mounted - is this right ?
As i understood things, no. Mounttime matters ;-) see
<http://www.tldp.org/HOWTO/LVM-HOWTO/snapshotintro.html> and as example
<http://www.tldp.org/HOWTO/LVM-HOWTO/snapshots_backup.html>.
if so, shouldn't filesystem also be frozen when a snapshot volume is
created ?
... see above ...
if it actually is done together with snapshot, does this mean that i
really can forget about xfs_freeze and just create snapshots ?
must i specify ro in mount options or is this optional ?
Well, if i'm wrong ( and to be honest, i didn't play around with all the
stuff for 1 1/2 years now :-( ) somebody might correct me, but if i
remember postings from linux-xfs mailing list, rw-snapshots with XFS is
not quite unstable ...
Cheers
Klaus
--
Klaus Strebel, Dipl.-Inform. (FH), mailto:klaus.strebel@xxxxxxx
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