Thanks Alex... 2011/1/27 Alex Hermann <a...@speakup.nl>
> On Thursday 27 January 2011, Klaus Darilion wrote: > > Am 27.01.2011 11:21, schrieb Danny Dias: > > > I've read some difficulty in the synchronisation of registrations > because > > > Kamailio works best when it stores registrations in memory and > > > registrations are constantly changing - they expire and are renewed, as > > > well as new ones joining and old ones leaving. To make the failover > > > solution function seamlessly, it is necessary to synchronise the > > > in-memory registrations between the primary and the backup server . > This > > > can be done by forking a copy of the registration request to the backup > > > server, but there are some practical problems in doing this, has anyone > > > do something with this? > > What problems are you referring to? I use this for some years now without > any > problems. > > > I checked for some problems here: http://www.smartvox.co.uk/astfaq_ha_failover_ideas.htm > > Yes - the problem with SIP based replication is that both proxies must > > be running. This is a problem as Kamailio binds to the virtual IP at > > start up - thus adding the virtual IP address to the backup server does > > not make Backup-Kamailio listening to the new IP address - you would > > have to restart the backup Kamailio. > > Just bind kamailio to the HA IP on both servers and do REGISTER replication > between the two (on SIP level). Then if the IP migrates to the other > server, > it will take over the rgistrar function with no loss of records. No restart > needed. > Do you mean that both Kamailio-1 and Kamailio-2 will be as primary server? and the clients will register in the 2 machines? and also they will bind to the ip of the HA? sorry my friend but i do not understand very well, i'm quite new with redundant systems, could you please explain a little? > > > > I think most people either have a database (which is highly-available by > > itself) which is used by both proxies, or every proxy has a local > > database and the synchronization is on DB level (e.g. master-slave > > replication, btw: does somebody know if usrloc DB queries are suitable > > for master-master replication?) > > Last time i tried, they are not, at least not in writeback mode. One proxy > is > expiring records from the DB which the other proxy is trying to update. > Maybe > DB-only mode will work, but that has some practical (performcance) > problems. > -- > Greetings, > > Alex Hermann > > > _______________________________________________ > SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list > sr-users@lists.sip-router.org > http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users > -- Ing. Danny Dias www.DannTEL.net
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