We have been hosting logbook far (geographically and in internet hops) from our experimental site. Recently we have (finally!) gotten reliable on-site internet, and would like to host the log book on-site.

I have a suspicion that some combination of the -C, -m, and -M flags will allow me to migrate the logbook automagically and with a minimum risk of trouble from concurrent operation on the logbook, and to maintain the existing version as a mirror of the new official on-site version. But documentation is not being very helpful. Can someone say a few more words about what these options do?

I've been experimenting as I compose this and have a suggestion for language that might be useful somewhere in the documentation:

In this context "to clone" means to copy the configuration file and all data files associated with a log book so that I can host an identical logbook on a new host (that is this is the command to migrate a logbook).  After cloning the two installation are identical, but no effort is made to keep them so: if you continue to run both copies post made to one will not be reflected in the other.

Is this correct?

I'm still not clear on what the -m and -M options do.