[jboss-user] [JBossCache] - Re: very slow bdbje loader implementation (CR3)

[manik.surtani@jboss.com]

"srnm" wrote : 
  | Am I correct in thinking that the FQN is really the "key" and that the fanout of actual keys underneath should be kept very small?
  | 

Correct.  This will help you achieve maximum concurrency in the cache.

"srnm" wrote : 
  | Do the jdbc loaders update a row/single key in a node at a time? If so, how do they support the semantics of the cache?
  | 

By using a separate shared lock on the Fqn.  See, for example, line 181 in JDBCCacheLoader

"srnm" wrote : 
  | Are there any hints recorded as to how to design a cache structure for optimal performance?

It depends.  Where are your bottlenecks?  Is it in concurrency, replication or cache loading?  :-)  Either way though, use the tree structure fully, don't put too much in each node.


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