On 05/04/2011 21:59, James Hawtin wrote:
On 05/04/2011 20:48, Jonathan Tripathy wrote:
Yeah, I'll have to try this on a non-production server. Which kernel
do you expect to crash? The Dom0 (Xen + LVM host) or the VM? Anyway,
just thinking about it, it seems that pausing/saving/shutting down
the VM is a must, as the VM may be writing to disk at the time of
zeroing the cow (!!).
In the hosting industy, what does everyone else do? Do they just
ignore the issue???
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As an alturnative could you not?
1) Create snapshot lv using specific physical extents.
lvcreate -s -l 100 ..... /dev/sdx1:0-99
2) Backup VM
3) Delete snapshot lv
4) create a normal lv using same physical extents
lvcreate -l 100 ..... /dev/sdx1:0-99
5) zero normal lv
6) delete normal lv
James
Hi James,
Interesting, didn't know you could do that! However, how do I know that
the PEs aren't being used by LVs? Also, could you please explain the
syntax? Normally to create a snapshot, I would do:
lvcreate -L20G -s -n backup /dev/vg0/customerID
Thanks
Thanks
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