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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] RE: [Xen-users] Backup; mount domU FS RO?
On Mon, Dec 19, 2005 at 08:04:50AM +0100, als@xxxxxxxxxxxxxxx wrote: [...] > A better approach is to use LVM and snapshots. Use LVM logical volumes > as "disks" for your DomU (if you aren't already doing this), create > snapshots for your backups, mount the snapshots and backup _those_. [...] > > I'm currently using this to backup our production DomU systems from > the Dom0 and it works very well. How do you assure that domU's filesystem is in a consistent state when the snapshot is being taken in dom0? Also, which distro+kernel do you use? Marcin You won't know, but I bet it works most of the time. While taking a snapshot the LVM system will lock the VFS to assure consistency. In the above scenario the dom0 has no way of locking the domU's VFS, therefore consistency is NOT assured. The LVM user above should be creating the snapshot from the same domU that has that logical volume mounted... At this point you're probably better off with another solution. Dan. _______________________________________________ Xen-users mailing list Xen-users@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-users
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