On the other hand, AFAIK syncprov knows what clients are in the persistent search state at any moment, so it might be able to export that under cn=monitor. Not that anyone has implemented this monitoring yet or even sure how useful that would be...
Yes, but you can pull that information out of syslog if you have stats logging enabled. But I think (hard to know for sure) they are asking for a way to know /all/ possibly replicas (currently connected or not). You used to be able to do that with slurpd back in OpenLDAP 2.3 and prior. Simply not possible with syncrepl if it's not set up using back-ldap to push out to the clients.
--Quanah -- Quanah Gibson-Mount Product Architect Symas Corporation Packaged, certified, and supported LDAP solutions powered by OpenLDAP: <http://www.symas.com>