On Mon, 2013-02-04 at 15:01 +0100, Thibault Le Meur wrote: > Le 01/02/2013 17:03, Thibault Le Meur a écrit : > > Thanks for the hints > > I'll go the rsync way then... pity I would have loved to understand what > > kind of file is to be fed to the "sync_client -u -f" command, in order > > to give it a try.. > Replying to myself, > According to an old thread > (http://lists.andrew.cmu.edu/pipermail/info-cyrus/2007-September/026772.html), > the file format is: > USER "$username" > USER "$username2" > It is also confirmed that the only way to have singleinstancestore > preserved is to run the sync_client with the "-f" option so that all > synchs are done in the same run. > However it seems that the cache which is used to detect the duplicates > is rather low (UUID cache on the server side: 1000) so that single > intance deduplication may not be very efficient. > Unless this has changed, I agree that the best way to initialize the > replica is to use rsync and then convert the databases. I'll give it a try. Correct, from a thread in 2007: <quote> Message UUIDs are used to replicate the single instance store (see docs/text/install-replication). This won't have much effect when you first replicate a mailstore as sync_server in 2.3 only tracks the last few thousand messages that have been uploaded. It becomes much more effective when a replica has been seeded and you switch to "rolling" replication. </quote> <quote> sync_server maintains a fairly modest UUID cache on the server side: 1000 messages in 2.3. A restart is negotiated after each UPLOAD command. </quote> It really does seem best to seed the replica, initially, via rsync [WATCH THOSE PERMISSIONS!] then to engage rolling replication - the replica should become current. Something like - rsync \ --verbose --recursive \ --perms --owner --group --times \ --links --hard-links --delete \ $master:$root $replica:$root I also like the --numeric-ids assuming your uidNumber/gidNumber is the same between systems. That saves a lot of pointless NSS calls. -- Adam Tauno Williams GPG D95ED383 Systems Administrator, Python Developer, LPI / NCLA ---- Cyrus Home Page: http://www.cyrusimap.org/ List Archives/Info: http://lists.andrew.cmu.edu/pipermail/info-cyrus/ To Unsubscribe: https://lists.andrew.cmu.edu/mailman/listinfo/info-cyrus
