On Fri, Sep 4, 2009 at 7:08 PM, Miguel Sanchez<ntadmin@xxxxxxxxx> wrote: > Hi. I have two hosts forming a cluster for run xen vm's. Each vm has a disk > which is corresponding to a clvm logic volume within dom0. > I pretended to backup the lv's from dom0 doing a 'kpart -a' and a readonly > mount (with the vm running). Probably it is not very correct (but the > alternative snapshot was not possible with clvm). Did you know that if you mount an ext3 partition READ ONLY you could actually do a WRITE to that partition to replay the journal, and so cause possible data corruption? > Most of times, the operation is ok, and the backup finishes with problems, > but in other cases 'mount -r /dev/mapper/device /path' does not return and > it stays consuming time indefinitely. I cannot kill the process y have to > fence the node. > > How could I make the domU backups within dom0 without these problems? You can't. Not without clvm snapshot. What you could probably do : - do backup from within domU - do backup from the SAN, if it supports snapshot. -- Fajar -- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster
