> > > Lars, > > > > > > I put MySQL databases on the drbd volume. To back them up, I pause > > > them and do LVM snapshots (then rsync the snapshots to an archive > > > server). How could I do that with LVM below drbd, since what I want > > > is a snapshot of the filesystem where MySQL lives? > > > > You just snapshot below DRBD, after "quiescen" the mysql db. > > > > DRBD is transparent, the "garbage" (to the filesystem) of the > > "trailing drbd meta data" is of no concern. > > You may have to "mount -t ext4" (or xfs or whatever), if your mount > > and libblkid decide that this was a "drbd" type and could not be > > mounted. They are just trying to help, really. > > which is good. but in that case they get it wrong. > > Okay, just so I understand.... > > Suppose I turn md4 into a PV and create one volume group 'vg_under_drbd0', > and logical volume 'lv_under_drbd0' that takes 95% of the space, leaving 5% > for snapshots. > > Then I create my ext4 filesystem directly on drbd0. > > At backup time, I quiesce the MySQL instances and create a snapshot of the > drbd disk. > > I can then mount the drbd snapshot as a filesystem? >
Disregard question. I tested it. Works fine. Mind blown. -Eric _______________________________________________ drbd-user mailing list drbd-user@lists.linbit.com http://lists.linbit.com/mailman/listinfo/drbd-user