[linux-lvm] Restoring method Snapshot to Orginal Volume
Antony.MARTINEAU at lippi.fr
Thu May 29 08:00:21 UTC 2008
I am using LVM2 whith XEN
All of my DomU disks are one or more logical volume
For exemple /dev/vg0/lv1
For the moment when i want do a domU backup, i take a snapshot, do an
image (dd gzip) of the snapshot, delete the snapshot and restor the dd
image on the original logical volume.
lvcreate -s -L500M -nlv1.snap /dev/vg0/lv1
dd if=/dev/vg0/lv1.snap bs=16M | gzip | dd of=/lv1.gz bs=16M
gzip -dc /lv1.gz | dd of=/dev/vg0/lv1
This method is very weight and not useful
dd if=/dev/vg0/lv1.snap of=/dev/vg0/lv1 should be perfect but it is
impossible because when restoring snapshot on the original volume, the
snapshot continue to increase until to become fully and inactive
Is there a solution to deactive the cow (copy and write)for during the
restoration about snapshot to original volume ?
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