Guillaume Rousse wrote: > Hello list. > > I had a look at section 18 of the admin manual, as I was trying to > figure difference between scenarios 18.2.2 (N-way multi-master) and > 18.2.3 (mirror mode). Whereas the descriptions of both scenarios are > quite clear, given examples configuration are quite confusing (at least > for me). > > First, they are quite hard to compare, as the first one uses LDIF > syntax, whereas the second uses the classical file configuration syntax. > > Second, they both use the same directives: > - a different serverId for each nodes > - mirrormode on for each nodes > - syncrepl directives for each nodes > > The only difference being than for multi-master, each node has syncrepl > directives for each nodes (including himself), whereas for mirrror mode, > each node only has syncrepl directives for other nodes. But it's hard to > figure if that's because of the replication scenario, or just because in > the first case, the configuration has to be identical everyhwere given > that it's replicated automatically. > > So, what is supposed to be different at configuration level between > those two scenarios ?
http://www.openldap.org/lists/openldap-software/200910/msg00089.html > Additonal question: doesn't a classical single-master + multiple slaves > scenarios, where each slave use chain overlay to automatically forward > all changes to the master, also achieve exactly what is described in the > mirror mode description ? Without the mirrormode feature you won't get automatic failover and recovery capabilities. -- -- Howard Chu CTO, Symas Corp. http://www.symas.com Director, Highland Sun http://highlandsun.com/hyc/ Chief Architect, OpenLDAP http://www.openldap.org/project/