replicating a live directory
lasse-rsync-2008 at mail.plastictree.net
Sun Mar 30 18:55:45 GMT 2008
* Message by -Joao Miguel Ferreira- from Sun 2008-03-30:
> we are using rsync to produce a replica of our filesystem.
> it's very important for us to be sure that the files replicated on the
> remote backup host are left in a consistent state as we may need to boot
> services from those files (configs, logs, etc)!
> right now we use a 'greedy approach'... we stop all important services
> (dhcpd, squid, sendmail, etc) just to minimize the possibility of copying to
> the backup a file that was being written.
> We would really like to leave all those important services up but we are
> really affraid of producing a corrupted replica...
Use filesystem snapshots.
Linux supports them via LVM.
Solaris and FreeBSD offer them too.
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