I assume that ITS7830 (MDB_MAP_FULL with lots of modifications and read access) is the same as ITS7904, and would be solved by a 'dreamcatcher' feature.
2014-10-22 16:26 GMT+04:00 Meunier, Antonin antonin.meunier@cgi.com:
Hello,
I currently have several problems with MMR with lots of modification of data made in the Ldap :
- ITS 7830 (http://www.openldap.org/its/index.cgi/Incoming?id=7830;selectid=7830) --> MDB_MAP_FULL with lots of modifications and read access
- http://www.openldap.org/lists/openldap-technical/201408/msg00152.html --> Pb with Modify in big groups. I reproduce in MDB but not in hdb (perhaps is it a problem with the OS and the management of its memory)
- http://www.openldap.org/lists/openldap-technical/201409/msg00165.html --> Delay with ADD and DEL synchronisation with at the end no DEL on the replica
- http://www.openldap.org/lists/openldap-technical/201409/msg00171.html --> Full sync of an empty ldap with a full ldap - modified entry on the full ldap are not replicated on the empty (greater than snapshot)
I cannot for the moment test with 2.4.40 but i'll try it soon.
-----Message d'origine----- De : openldap-technical [mailto:openldap-technical-bounces@openldap.org] De la part de Quanah Gibson-Mount Envoyé : lundi 20 octobre 2014 21:34 À : Леонид Юрьев Cc : openldap-technical@openldap.org Objet : Re: Synchronizing two mirror mode clusters
--On Saturday, October 18, 2014 9:11 PM +0400 Леонид Юрьев leo@yuriev.ru wrote:
Sorry, but currently I strongly not recommended multi-master. We have a big troubles in the same case, but most high load.
I am currently working on the two major issues:
- syncrepl seems unreliable, survives no more than 3-5 min under a
stress test (ITS#7968).
- fix of ITS#7904 does not affect syncrepl, thereby MDB_MAP_FULL may
occur in case of LMDB backed (no ITS now).
But another couple seem be forever:
- replication is significantly slowdown if are more than 3 nodes.
- replication may never be completed until all ldap-write activities
are stopped.
Test cases? ITS reports?
Also, I personally use delta-syncrepl vs straight syncrepl.
--Quanah
--
Quanah Gibson-Mount Server Architect Zimbra, Inc.
Zimbra :: the leader in open source messaging and collaboration