Леонид Юрьев wrote:
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.
Would be best to have an actual reproducible test case so we don't have to
assume anything.
2014-10-22 16:26 GMT+04:00 Meunier, Antonin <[email protected]>:
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)
There was already a reply to this, but you never followed up with any feedback.
- 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:[email protected]] De la
part de Quanah Gibson-Mount
Envoyé : lundi 20 octobre 2014 21:34
À : Леонид Юрьев
Cc : [email protected]
Objet : Re: Synchronizing two mirror mode clusters
--On Saturday, October 18, 2014 9:11 PM +0400 Леонид Юрьев <[email protected]>
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
--
-- Howard Chu
CTO, Symas Corp. http://www.symas.com
Director, Highland Sun http://highlandsun.com/hyc/
Chief Architect, OpenLDAP http://www.openldap.org/project/
