LDAP master means you can read/write from/to it.
LDAP replica means you can only read from it (you write to master and master replicates to slave).
You can have 3 or 4 slaves if you wish but you'll need that much LDAP servers for _huge_ infrastructures (> 100.000 users)...
One master and one slave is enough in most cases.
Don't forget to setup correctly your other servers to use the replica. |