replication - master and slave at one time - possible?

[Tomasz Chmielewski <mangoo@interia.pl>]

Hello,

This post is a continuation of "central database on one server, 
"dislocated" servers in many cities", which I posted on 26.10.04.

Is such scenario possible - there are two (or more) OpenLDAP servers, 
and each of them is both master and slave to each other?

I have that situation:

Employees travel a lot between branches with their laptops.
And so there are:

1) central user/password database in LDAP (master),
2) many branch offices - divided by slow WAN - and thus each also have 
the same central user database in LDAP (slaves get data from master in 
point 1).

But as users would like to change their passwords, they would have to 
change their passwords in their respective branch offices (to avoid slow 
WAN).
And because of that, there is a switch of roles, slave becomes master, 
and master becomes slave:

a) user updates password in a branch office (over LAN) - now branch 
office is a master
b) password is transferred to the central user/password database (over 
WAN) - central database is slave now
c) password is transferred to all branch offices (over WAN) - they were 
slaves, and still are.


Wouldn't this "each server is a master and slave at one time" cause some 
terrible loops and never-ending changes?

Is it a good solution? Or what should I use in this situation?


Tomek