[DRBD-user] A Summary of LVM snapshots with DRBD

Lars Ellenberg Lars.Ellenberg at linbit.com
Thu Apr 8 13:43:47 CEST 2004

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.


/ 2004-04-08 13:18:53 +0200
\ Andreas Semt:
> Lars Ellenberg wrote:
> >
> >
> >There are file systems that have their own suspend and resume
> >hooks. One of them is XFS, which will only work with DRBD 0.7+
> >If you happen to use some of these, you can always do a clean
> >snapshot by suspending the active (mounted) file system,
> >creating the snapshot, and tell the fs to resume again.
> >
> >Eventually we will built in into the user space tools or into the
> >module, or both, some hooks to guarantee a clean snapshot.
> >This does not seem to be that difficult, but it will take some
> >time to do it right, and somebody just has to do it :)
> >
> 
> That would be a big step forward for drbd, imho. The ability to make 
> consistent and clean snapshots in a HA environment seems to be a 
> important feature for some people ;-)

Well, the thing is:

	*You can do so already*,
	by using LVM2 on top of DRBD.

So implementing additional hacks and hooks is just very low priority.

	Lars Ellenberg



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