Re: slave to master
Johan De Meersman <[email protected]>
| Newsgroups | gmane.comp.db.mysql.general |
|---|---|
| Message-ID | <[email protected]> |
----- Original Message ----- > From: "Jason Mallory" <[email protected]> > Subject: RE: slave to master > > Master-master with load balancer would be best That's a bit brief, isn't it? :-) It's more than worth pointing out that your loadbalancer should not actually be loadbalancing the connections; master-master replication doesn't quite work the way you think it does in most scenarios. You only want the loadbalancer for the automated failover; but it should never send requests to more than one master at any given time. Have it send everything to your primary master only; and when that host fails, have it send everything to the secondary master only, and never fail back automatically. It's also worth noting that master-master is still not an officially supported replication topology. Regular master-slave also works fine with the above loadbalancer configuration; in that case you'll just treat the slave as the new primary after failover; and will manually reconfigure the broken master to be a slave (and adapt the loadbalancer config accordingly) as repair. There does exist software that can do those reconfigurations by itself, MMM is one such example. /Johan -- Unhappiness is discouraged and will be corrected with kitten pictures. -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/mysql