Maxime Gaudreault wrote:

I configured my 2 tests server to replicate with syncrepl using this website: [..] It works well. If I create a new user on any servers it's immediately replicated to the other. However I have some error in the log files:

(these 2 messages appears every 10 seconds on the first server (vmlinux01))

Sep 22 11:53:56 vmlinux01 slapd[12072]: <= bdb_equality_candidates: (entryCSN) not indexed

Sep 22 11:53:56 vmlinux01 slapd[12072]: <= bdb_inequality_candidates: (entryCSN) not indexed

These are warnings (not errors) indicating what they say. An LDAP client is searching for any unindexed attribute, here 'entryCSN' used with syncrepl. You can add this index to increase performance.

How do I add an index after populating the database? http://www.openldap.org/faq/data/cache/136.html

Sep 22 11:24:51 vmlinux02 slapd[10596]: do_syncrep2: rid=001 (-1) Can't contact LDAP server

Sep 22 11:24:51 vmlinux02 slapd[10596]: do_syncrepl: rid=001 retrying (4 retries left)

It seems your slave replica (temporarily?) could not connect to the master replica.

Ciao, Michael.