[CentOS-virt] Backing up a running KVM guest
centos.org at jul17pri.co.uk
Fri Mar 27 18:10:11 UTC 2009
Kai Schaetzl wrote:
> I'm not sure what you mean....
I mean that I am backing up one 32GB virtual disk in one file called
vm.img or vm.qcow or vm.vhd depending on the virtual disk format.
The advantage is that
- we don't care which operating system is inside the virtual disk file
- We can use the LVM snapshot to ensure that the virtual disk file
represents a moment in time, and doesn't change during the backup, so it
- There is no need to hold the database lock during the backup - only at
the moment the snapshot is started.
The answer to whether this technique works with Xen is answered 'Yes' on
They are using their proprietary backup software instead of rsync but
the technique is essentially the same.
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