The PartitionName attribute in cluster-service.xml and the ClusterName
attribute in tc5-cluster-service.xml end up doing the same thing -- they are
passed to the JGroups channel each service creates to give that channel it's
name.
Each service needs its own JGroups channel (that will change in JBoss 5.0, but
its definitely true in 3.2.x and 4.0.x). The channel name is one of the things
that gives a channel its identity. So, yes, for each TreeCache you deploy,
you'll want to give it a different ClusterName.
A good approach with a TreeCache used in the appserver is to do something like
this:
<attribute
name="ClusterName">MyCache-${jboss.partition.name:DefaultPartition}</attribute>
The first part is a unique name for the cache; different from other caches you
deploy. The second part is whatever you pass to a -g switch at the command
line, or "DefaultPartition" if you don't pass anything.
Then start jboss with the -g switch
run -g MyPartition -c all
The ClusterName for your cache would then be MyCache-MyPartition. For the
tc5-cluster-service cache it would be Tomcat-MyPartition. The PartitionName in
cluster-service.xml would be MyPartition. All unique, but \having a common bit
of info.
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