[jboss-user] [JBossCache] - Re: What replicates in JBC 1.4?

"jorgemoralespou_2" wrote : For a 10000 atribute node, what data is replicating when we change on of the attributes? Is it replicating the whole node data, or only the changed attribute? | It depends. It really replicates a method call, so if you do: | Node n; // contains 100000 attribs | Map m = generateData(); // creates a map with 10000 attribs | n.putAll(m); | The above will replicate a map with 10000 attribs. But if you do: | Node n; // contains 100000 attribs | n.put("hello", "world"); | The above will replicate the single key/value pair. "jorgemoralespou_2" wrote : What is faster, access to a 10000 attribute node, or access to 10000 nodes single attributed? | Again, depends. If your tree is deep, walking the tree will become a performance overhead. Also depends on your data access patterns: if you do a lot of bulk updates (node.putAll()) having more attribs in a single node would be faster, but will reduce concurrency. "jorgemoralespou_2" wrote : Would REPL_ASYNC signify a performance gain? Yes, in so far as you don't block on replication completing. Also means you scale better as your cluster size increases. "jorgemoralespou_2" wrote : Would the be deadlocking issues when more threads access cache. Possibly. See Optimistic Locking. "jorgemoralespou_2" wrote : Is it better to set up TCP replication? Depends on your network. With Buddy Replication this could be better. "jorgemoralespou_2" wrote : Is there any performance tunning guide? Not yet. :-( View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4110289#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...