[linux-lvm] backup with snapshots - some principal questions

[Lentes, Bernd]

Hi,

i have several servers running different Linux distributions.
Our computing center provides a network-based backup solution
(Legato/EMC), which saves the disks every night. But when the servers run,
this backup is of course not consistent.
The servers are running a lvm configuration (/ on lv and /boot on a
physical partition).
My idea is to create a snapshot and mount it before the network backup
comes. When this is stored, my backup is consistent. I can configure the
networker client in such a manner that the "live" lv is not saved, just
the snapshot so that the server is not saved twice.
My questions:
Before I create a new snapshot, I'd like to remove the old one. Is there
something I have to take care of or can I just delete it using lvremove ?
No merging or s.th. like that before ?
What is if I'd like to apply the snapshot ? Which command do I have to use
for rolling back the system to a snapshot ?

Thanks.


Bernd

--
Bernd Lentes

Systemadministration
institute of developmental genetics
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bernd.lentes at helmholtz-muenchen.de
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