[linux-lvm] LVM snapshot with Clustered VG [SOLVED]

Vladislav Bogdanov bubble at hoster-ok.com
Sat Mar 16 11:00:18 UTC 2013

15.03.2013 21:38, David Teigland wrote:
> On Fri, Mar 15, 2013 at 08:46:53PM +0300, Vladislav Bogdanov wrote:
>> I also thought about dlm one (may be the next step :) ), 
> Let me know if you decide to start work on this and I can probably lend
> some help.
>> Of course, I fully agree that clvm is just a big hack from the today's
>> point of view and something need to change here.
> Since you're open to hacking components together, here's another possible
> hack:  you could create a gfs2 file system on the shared storage, and use
> file locks on gfs2 files.  The gfs2 files could be the actual vm images,
> but they do not have to be.  You could still use lv's for vms directly,
> and create empty files on gfs2 representing each lv.  The virtlockd file
> locks would be acquired on the empty gfs2 files, representing the lvs.
> This is another indirect way of using dlm locks, since the gfs2 file locks
> are passed to the dlm.

That would not solve issue with exclusive LV activation which is
required to take snapshots (and just for more safety), but prevents


More information about the linux-lvm mailing list