Hello, Short answer: No. Use separate classes (or derive your combiner from the reducer, with modified behavior).
I answered a similar question not too long ago from now: http://search-hadoop.com/m/Wh7vuKJEtL1/reducer+combiner&subj=Differentiate+Reducer+or+Combiner HTH. On 14-May-2011, at 1:17 AM, W.P. McNeill wrote: > I have a MapReduce process that uses the same class for its combiner and > reducer. I just realized that I want the behavior in the combiner and > reducer to be slightly different in this one place. I could write separate > combiner and reducer classes derived from a common source, but in my > situation this is overkill. Is there some way I can tell at runtime whether > I'm running as a combiner or a reducer? Like some configuration setting? -- Harsh J
