[jboss-user] [Clustering/JBoss] - Re: Clustering / Multicast routing

[bstansberry@jboss.com]

Missed your question about the tomcat cluster.  Yes, you should use a separate variable for that :(.  With JBoss 5, this will be easier as by default all services will share a single JGroups channel. And there will be a startup switch (a la -u, -b, etc.) for setting the mcast_port for the shared channel.

BTW, the reason for setting the mcast_port to a different value for different groups is discussed here: http://wiki.jboss.org/wiki/Wiki.jsp?page=PromiscuousTraffic .  If not for this issue, using different values for -u would be sufficient.

Also, if you aren't using 4.0.4 or later, edit the ClusterName attribute in tc5-cluster-service.xml for it's value is "Tomcat-${jboss.partition.name:DefaultPartition}".  That will cause the value you pass to -g to be part of the name, further helping to isolate the 50 clusters.  In 4.0.4 and later the default value for ClusterName uses that syntax.

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