On Aug 24, 2011, at 11:37 AM, Sujee Maniyam wrote: > sounds like even I created an HTablePool and shared it among threads (which > seems safe to do as pointed out here), I won't see much improvements for > accessing the SAME table in multiple threads. > > correct?
That depends on how many region servers your table is split across. The unit of sharing, as I understand it, is the client connection to the region server. If your threads use keys that fall into the same region, they share a connection. If your threads use keys that fall into different regions on the same region server, they still share a connection. If your threads use keys that fall into different regions that are distributed across different region servers, they do not share a connection and you get maximum concurrency. joe
