| |
|
 |
|
 |
|
|
|
| |
|
|
xen-users
Re: [Xen-users] cloning guests between Dom0's ?
Simon Hobson wrote:
Ferreira, N.L. wrote:
For a LVM LV you can do the following (using the LVM snapshot)
without shutting down the domU:
lvcreate -s /dev/vg/domU -L1G -n domU_snap
mkdir /mnt/domU_snap
mount /dev/vg/domU_snap /mnt/domU_snap
tar cvjpf /storage/path/domU_snapshot.tbz /mnt/domU_snap
lvremove /dev/vg/domU_snap
Is this correct ? I know the LVM snapshot will give you a "point in
time" image, but won't the DomU have unwritten changes in it's cache -
giving you a very unclean filesystem ?
You probably want to use kpartx on the snapshot and mount the right
partition for backups. However, as you'll say, you'll probably come
unstuck when you try to mount the file system because it will be
corrupt. You need to cooperation of both the OS and any running
applications in the domU for this approach to work. A good way to get
everything consistent for backing up is to shut down the guest OS, take
the snapshot and the re-start the guest OS. Or at least have the guest
unmount the file system(s) you're going to back up before you take the
snapshot.
Backing up data from a machine (physical or virtual) is surprisingly
difficult unless you can enlist the help of the machine. It's almost
always easier to do it from within the machine.
jch
_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users
|
|
|
| |
|
Home