I think you've misunderstood something important here.
> I was not clear of the benefits of setting up a colocated backup servers > with data replication approach. The benefits of colocation are the same whether you use shared-store or replication. The difference is simply how the messages get from the master to the slave. > If I set up master activemq server and slave activemq server in the same > wildfly instance, then the messages will be copied from master to slave? You would never colocate a slave in the same JVM as its master as it would be useless for HA purposes. I'm not sure where you got that idea. > But then the messages in slave activemq.2 will still not > be accessible since it is master activemq.2 that is active. When master activemq.1 dies then slave activemq.2 will activate so the messages are available. That's the whole point of fail-over. Justin ----- Original Message ----- From: "wwang2016" <[email protected]> To: [email protected] Sent: Thursday, August 11, 2016 1:07:08 PM Subject: Re: How to configure colocated backup servers for data replication approach Hi Justin, I was not clear of the benefits of setting up a colocated backup servers with data replication approach. If I set up master activemq server and slave activemq server in the same wildfly instance, then the messages will be copied from master to slave? That does not seem to be a useful feature since you would like the messages to be copied between wildfly instances to support HA for messaging. The only scenario I can imagine is that for data replication, we set up the following: Wildfly #1 (master activemq.1 + slave activemq.1) Wildfly #2 (master activemq.2 + slave activemq.2) Where master activemq.1 pairs with slave activemq.2 and master activemq.2 pairs with slave activemq.1. This way, if wildfly #1 is down, the slave activemq.2 will get a copy of master activemq.1. But then the messages in slave activemq.2 will still not be accessible since it is master activemq.2 that is active. I can see the benefit of setting up colocated backup servers with shared-store, but not with data replication. Thanks, Wayne -- View this message in context: http://activemq.2283324.n4.nabble.com/How-to-configure-colocated-backup-servers-for-data-replication-approach-tp4715415p4715417.html Sent from the ActiveMQ - User mailing list archive at Nabble.com.
