On Thu, Feb 21, 2013 at 1:22 PM, Martin B Nielsen <martin@xxxxxxxxxxx> wrote: > Hi, > > Just curious here - if a setup would have only 1 monitor - and that > monitor dies; what would happen? > > If say the cluster is only used as rbd with blockdevices running VM - > would they keep running or would everything just stop? > > Also, what options would there be if the disk with the monitor died > and there was no backup? Can one create a new monitor and just dump > into the cluster or would that require a complete backup of whatever > the original monitor had (as in, if the disks of the one monitor dies > and one has no backup = game over?). Or would a backup not even > suffice? Game over, essentially. You shouldn't run anything but the most trivial test clusters with a single monitor. I could reconstruct a usable monitor from data available through the rest of the system if necessary, and for a sufficient fee to Inktank — someday we will have tools for this, but they don't exist right now — but it's a lot cheaper to just run three monitors from the get-go. ;) -Greg _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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