rsync - Nov 2003 - Mirroring cvs archives

I have started mirroring various cvs archives such as gcc, but I have started 
wondering/worrying about the validity of doing this. If the cvs archive is 
busy and potentially subject to many accesses during the rsync process, is 
the mirrored copy going to be valid/consistent?

Any information/help greatly apprieciated

Andrew Walrond

On Mon, Nov 03, 2003 at 09:08:48AM +0000, Andrew Walrond
wrote:
> I have started mirroring various cvs archives such as gcc, but I have
started
> wondering/worrying about the validity of doing this. If the cvs archive is 
> busy and potentially subject to many accesses during the rsync process, is 
> the mirrored copy going to be valid/consistent?
> 
> Any information/help greatly apprieciated
Each file will be self-consistent.

If someone commits a set of files while the rsync runs it is
possible that some of the files will reflect the commit and
some won't.  I don't think there is any meta-data that would
suffer much from inter-file inconsistency but that would be
a question for the CVS people.

Few CVS repositories get so much activity that they have no
quiescent moments.  If full consistency is wanted there may
be a file you can check before and after the rsync to see if
anything changed and then do a resync.


-- 
________________________________________________________________
	J.W. Schultz            Pegasystems Technologies
	email address:		jw@pegasys.ws

		Remember Cernan and Schmitt

On Mon, Nov 03, 2003 at 02:02:50PM -0800, jw schultz
wrote:
> If full consistency is wanted there may be a file you can check before
> and after the rsync to see if anything changed and then do a resync.
Yeah, I was thinking that rsyncing the $CVSROOT/CVSROOT directory first
(before transferring anything else) and then again at the end should
tell you if something got committed during the transfer by noticing if
the history file gets updated.  If it has changed, rerun the sync of the
non-CVSROOT dirs until the history file is finally quiescent.

..wayne..