On Apr 16, 2009, at 2:02 AM, Lars Ellenberg wrote:
On Wed, Apr 15, 2009 at 08:31:44PM +0200, christophe.varoqui@xxxxxxx
wrote:
Should I understand there's no way for userspace to extract from
the device mapper the cow'ed chunk list of a vanilla snapshot ?
Replying to myself, I found an instructive post from Lars of the
drdb folks : http://markmail.org/message/7qdbp36tohasojuy (thanks
for sharing Lars)
This script is easy enough to morph from its original snapshot
reverting purpose to the replication model using the cow device as
a changelog I described.
Thanks for the inputs. I'll keep posting if I something of general
interest comes out of this stuff.
that perl hack was meanwhile ported to C by someone.
posted earlier this year on dm-devel.
also please do not ignore the Zumastor work.
It also seems that the script is not generic enough to handle the
variety of exception stores that are coming. I just wrote a 'snapshot-
merge' target that will do what you ask. I will post the patch
shortly. However, this won't help you in RHEL5.
brassow
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