Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
Thanks Arnold What's the correct to rcovery a drbd snapshot? I believe the volume-before-resync was snapshot of the underlying logic volume , not the /dev/drdrbX, during recovery, I should dump the snapshot to logic volume, is that right? The traditional lvm snapshot recovery was dd the snapshot to a file, the dd the file to the original volume. However, in my environment, I don't have enough space. Would lvm merge help? However it doesn't supported by SLES yet. In my situation, what should I do to completely resync the data of secondary node, including the drbd metadata ? On Sat, Aug 27, 2011 at 1:27 AM, Arnold Krille <arnold at arnoldarts.de> wrote: > > On Friday 26 August 2011 17:33:09 Lyre wrote: > > Yesterday, On the secondary, I shut down drbd, try to use rsync to > > recovery the snapshot, but failed. Then I start drbd to resync from the > > primary node. It was the only time I bypass drbd, howerver,the application > > seems good at that time. > > > > This afternoon, we continue our experiment, disconnect drbd on secondary, > > changed something and resync from priamry. Oracle was unable to start. > > drbd status suggest that both node were uptodate, drbadm verify doesn't > > report any error. Disconnect one side and mount drbd device on both node, > > md5sum show that some files were different. > > rsync works on file(-system)-level, drbd compares disks and blocks. So by > mixing both these tools, even though the filesystem mounted by hand on both > seems to be the same, the disks aren't the same anymore once rsync did write > something. > And during the time drbd is off and you changed something, drbd will not > recognize these changes. Due to the fact that a) drbd was off at that time and > b) drbd works on block-device-level. > > If this sounds like "you are fu**ed", that is partly intended. Mixing the > levels of access is experimental at best and you better have a backup before > starting such stuff. > > Have fun, > > Arnold > > _______________________________________________ > drbd-user mailing list > drbd-user at lists.linbit.com > http://lists.linbit.com/mailman/listinfo/drbd-user >