[jboss-user] [JBossCache] - Re: TreeCache replication optimization

[bstansberry@jboss.com]

TreeCache will replicate the modified key value pairs, not the whole node and definitely not any other nodes.  So if you do a put("/a/b/c", "x", "y") an object encapsulating that command is replicated.

Putting everything in one node could be faster in a simple test because the shallower your tree, the faster the navigation to the needed node is.  But, there could be a heavy price to pay in a multi-threaded system.  With READ_COMMITTED or stronger isolation, if one thread is modifying that node, all other threads are blocked waiting to read it.  With finer-grained nodes, any lock contention is also more fine grained.

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