On Fri, 30 Jan 2015 01:22:53 +0200 Georgios Dimitrakakis wrote: > Urged by a previous post by Mike Winfield where he suffered a leveldb > loss > I would like to know which files are critical for CEPH operation and > must > be backed-up regularly and how are you people doing it? > Aside from probably being quite hard/disruptive to back up a monitor leveldb, it will also be quite pointless, as it constantly changes.
This is why one has at least 3 monitors on different machines that are on different UPS backed circuits and storing things on SSDs that are also power failure proof. And if a monitor gets destroyed like that, the official fix suggested by the Ceph developers is to re-create it from scratch and let it catch up to the "good" monitors. That being said, aside from a backup of the actual data on the cluster (which is another challenge), one wonders if in Mike's case a "RBD FSCK" of sorts can be created that is capable of restoring things based on the actual data still on the OSDs. Christian -- Christian Balzer Network/Systems Engineer [email protected] Global OnLine Japan/Fusion Communications http://www.gol.com/ _______________________________________________ ceph-users mailing list [email protected] http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
