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xen-users
Re: [Xen-users] Backup; mount domU FS RO?
Andy Smith wrote:
On Sun, Dec 18, 2005 at 09:26:12PM +0100, Ralf Folkerts wrote:
I found some warnings that Filesystems may not be mounted RW by more
than one domain / system (makes sense when they don't "know" about each
other). However, are there any issues mounting a Filesystem Read-Only,
then have it being backed-up by Bacula and then unmount it?
The short answer is yes, it's almost as bad as mounting it RW twice.
Your dom0 kernel will make some assumptions about the read-only
nature of the filesystem which will be invalidated when the domU
changes it underneath.
You need a cluster filesystem susch as GFS or OCFS2 to do this.
Or if you use LVM you can create snapshots from which you can backup
your data.
Nathan
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