On 3/15/12 4:25 PM, Manik Surtani wrote: > > On 15 Mar 2012, at 04:31, Bela Ban wrote: > >> If we touch a lot of keys, then sending *all* of the keys to all owners >> may be sub-optimal; as an optimization, we may want to send only the >> keys to the nodes which need to store them. This would make the PREPARES >> potentially much smaller. > > > Not really - if we are sending different prepares to different nodes > (containing different writes) then the serialisation overhead goes up since > each recipient gets a different byte buffer. In the current case we reuse > the byte buffer.
In my experience, serialization is never the bottleneck, it is *de-serialization*, so this shouldn't be a problem. Also, I don't see why serialization of keys [1..9] shouldn't take roughly the same time as serialization of keys [1..3], [4..6], [7..9]. If we have a TX which touches a lot of keys, unless we break the key set down into their associated targets, we would have to potentially transfer a *big* state ! -- Bela Ban, JGroups lead (http://www.jgroups.org) _______________________________________________ infinispan-dev mailing list [email protected] https://lists.jboss.org/mailman/listinfo/infinispan-dev
