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From "Gyula Fora (JIRA)" <j...@apache.org>
Subject [jira] [Created] (FLINK-2281) Allow chaining of operators with multiple inputs
Date Fri, 26 Jun 2015 20:32:05 GMT
Gyula Fora created FLINK-2281:
---------------------------------

             Summary: Allow chaining of operators with multiple inputs
                 Key: FLINK-2281
                 URL: https://issues.apache.org/jira/browse/FLINK-2281
             Project: Flink
          Issue Type: Improvement
          Components: Streaming
            Reporter: Gyula Fora
            Assignee: Gyula Fora
            Priority: Minor


Currently only operators with one input can be chained for better performance. In principle
there is no reason why this should not be extended to multiple input operators (where chaining
is applicable, i.e forward connected), to allow maximal speedup.

The concern usually arises that it might not be good to always chain everything in case of
computation heavy operators. In these cases (if the job is otherwise viable) chaining only
increases latency for some operations while the throughput is increased exploiting by increasing
the parallelism to the freed resources.

In any case chaining should still remain tunable on an operator level.



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