Clustering for multi data centers?

theoverlord Aug 15, 2016 10:28 AM

Does Wildfly support clustering for multiple data centers ?

In the past, JBoss has pretty much not even dealt with this issue at all.

What I mean by clustering data centers is that nodes in one data center should prefer to communicate with nodes in the same data center because communications over a a WAN is much slower than a LAN.

TIA

1. Re: Clustering for multi data centers?

pferraro Aug 16, 2016 3:49 PM (in response to theoverlord)

WildFly 8 added support for bridging multiple clusters via the RELAY2 JGroups protocol.
See: Reliable group communication with JGroups
JGroups Subsystem - WildFly 10 - Project Documentation Editor

Additionally, the Infinispan subsystem can be configured to use RELAY2 to backup cache entries from one data center to another (or many). In such a configuration, a Cache.get(...) will always stay on the LAN, unless there are no nodes in that data center that contain the requested cache entry.
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2. Re: Clustering for multi data centers?

theoverlord Aug 16, 2016 3:53 PM (in response to pferraro)

That's good to know.

What about when using MDB or Session Beans ?

It would be preferable that an invocation would stay on the same LAN unless all the nodes are busy.
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3. Re: Clustering for multi data centers?

pferraro Aug 17, 2016 7:09 AM (in response to theoverlord)

Session EJBs will always have an affinity for nodes in the originating cluster (i.e. data center). Someone from the messaging team will have to answer your MDB side of your question.
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