On 2/24/2011 1:15 PM, Nataraj wrote:
One other thing that wasn't mentioned here.... As far as I understand, if these are lvms on the host and the snapshots are being taken on the host, there is no guaranteed integrity of the filesystems unless you shutdown the guest while the snapshot is taken. It's too bad they don't implement a system call that could do something like sync filesystem and sleep until I tell you to continue. This would be perfect for snapshot backups of virtual hosts.
Syncing a filesystem's OS buffers isn't really enough to ensure that running apps have saved their data in a consistent state. The best you are going to get without shuting things down is more or less what you'd have if the server crashed at some point in time.
-- Les Mikesell lesmikesell@gmail.com _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
