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xen-users
Re: [Xen-users] Re: Data Backup and Restore Scripts for your Xen Servers
Steven Anderson wrote:
> I was trying to understand why one wouldnt use LV snapshots
because it gives you a backup of a 'dirty' filesystem. that is, a snapshot
when it's mounted, and without any guarantees about all processes having
flushed important data to disk.
recovering from such a backup is to the system just like recovering from a
'pull the plug' event. In most cases an fsck is enough and the (little) lost
data is within reason for a catastrophic failure. In other cases (usually when
a busy database is involved), it's just not OK, you could recover data that is
totally inconsistent, maybe needing a complex analysis to bring it back to a
reasonable state.
IOW, it's better to use a 'normal' backup system, and be sure to get
cooperation from any DB system.
--
Javier
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