[vox-tech] Cloning LVM volume over network

[Brian Lavender]

On Sun, May 27, 2012 at 09:16:24AM -0700, Wes Hardaker wrote:
> Alex Mandel <tech_dev at wildintellect.com> writes:
> 
> > I'm looking for the most efficient way to clone an LVM volume 50GB from
> > one physical machine to another. Both machines must stay up, so that
> > rules out clonezilla. I'd also like it to be more efficient that dd, so
> > more similar to partimage or partclone where it skips the empty space
> > and only copies the filled part.
> >
> > Anyone have examples that show how to do this?
> 
> I'd typically use rsync...  Fast and efficient :-)

Assuming the lvm volume is mounted on both sides and you tunnel rsync over ssh. 
If you are in an internal network, you could do it over rsh and avoid the crypto
overhead.

cd /mnt/local

Then use the the following from the rsync man page, clipped below. 
rsync uses the -e option for ssh, but I don't quite have a machine to test it.

 To synchronize my samba source trees use the following: 

                   rsync -Cavuzb . remote_machine:/mnt/local/

It is clipped from where Tridgell talks abut syncing his samba shares using
a Makefile and samba source code for CVS commits.

brian

-- 
Brian Lavender
http://www.brie.com/brian/

"There are two ways of constructing a software design. One way is to
make it so simple that there are obviously no deficiencies. And the other
way is to make it so complicated that there are no obvious deficiencies."

Professor C. A. R. Hoare
The 1980 Turing award lecture