Hi,
What happens is that I use LVM2 with XEN virtualization.
I've got 15 Vm running. I want to make an LVM snapshot of a running VM
to avoid problem with somes daemons like LDAP or MYSQL and use
hotbackup script.
I would like to make a script that:
- make an LVM snapshot
- mount the LVM snapshot
- do rsnapshot backup
- remove the LVM snapshot
Scott Hess a écrit :
On 11/14/06, David Cantrell <david < at > cantrell.org.uk> wrote:
On Sat, Nov 04, 2006 at 11:51:55AM +0100, S?bastien CRAMATTE wrote:
I would like to know if it possible to make backup using "LVM 2
snapshot" + rnapshot ?
I've not used LVM, but my understanding is that its snapshots are true
point-in-time snapshots like what you get with expensive Netapps and the
like. Consequently, for *local* backups you almost certainly don't want
to use it with rsnapshot as well, as rsnapshot doesn't do as good a job
(we don't really do point-in-time snapshots).
It might make sense to rsnapshot an LVM snapshot, though, if you're on
a busy system. You'd need to wrap rsnapshot in a script to take the
LVM snapshot before running rsnapshot against whatever (presumably
read-only) mount-point manifests.
I believe that the main consideration would be to have enough space
for the LVM snapshot to survive until the worst-case rsnapshot is
complete, otherwise you'll cause strangeness for your users.
-scott
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