On Nov 22, 2011, at 2:34 AM, Steve Loughran wrote: > On 22/11/11 02:18, Harsh J wrote: >> Are gonna be maintaining both APIs forever? > > > That's a key point. Either there are two apis forever or, some time after the > new APIs are both a proper superset of the old APIs (are we there yet?) and > the majority of downstream project have migrated to the new APIs, then the > old ones can be removed. > > And how do you persuade developers to move off the old APIs except through > deprecation warnings? >
It isn't clear, yet, if the new apis are a proper superset of the old APIs i.e. only in 0.21 did they come close to completion (added new Cluster apis etc.). As a result, with very little exposure, it's hard to mark them as 'stable' yet. Hence, my proposal to keep the old apis as stable and new one as evolving for hadoop-0.23. Furthermore, my personal preference would be to further tweak the new apis along the lines of https://issues.apache.org/jira/browse/MAPREDUCE-1183 before we declare them stable (that has real benefits for Pig/Hive etc.), but that is some way away. Arun
