[infinispan-issues] [JBoss JIRA] (ISPN-1988) Coalesce updates to a given key to a single operation within a transaction

Coalesce updates to a given key to a single operation within a transaction -------------------------------------------------------------------------- Key: ISPN-1988 URL: https://issues.jboss.org/browse/ISPN-1988 Project: Infinispan Issue Type: Feature Request Components: Transactions Affects Versions: 5.1.4.FINAL Reporter: Mircea Markus Assignee: Mircea Markus Labels: optimisation, transaction Fix For: 5.2.0.FINAL Following code run with optimistic caches: start tx put k, v1 put k, v2 put k, v3 commit Would cause the PrepareCommand that is sent around to contain 3 PutKeyvalueCommands which is sub-optimal. What we can do is to only send the last written value (i.e. k v3) and ignore the previous two (reuse the code in AsyncCacheStore). Besides reducing the payload, from this would benefit the AtomicHashMaps which uses this code quite a lot and also the OptimisticLockingInterceptor which would not attempt to order the keys. I guess this should be a feature that is disabled by default, as I don't think it is required in general. Might as well be not configurable, enabled by default feature. Comments?