[jira] [Created] (PIG-5260) Separate bloom filter for each reducer of the join

["Rohini Palaniswamy (JIRA)" <ji...@apache.org>]

Rohini Palaniswamy created PIG-5260:
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             Summary: Separate bloom filter for each reducer of the join
                 Key: PIG-5260
                 URL: https://issues.apache.org/jira/browse/PIG-5260
             Project: Pig
          Issue Type: New Feature
            Reporter: Rohini Palaniswamy


   Currently bloom join allows specifying the number of bloom filters and all of them are broadcast to each join vertex. The bloom filter partition logic is joinkey hashcode % num_filters. The reducer partition logic is joinkey hashcode % num_reducers. If we made the number of bloom filters equal to number of reducers in the join we can just broadcast bloom filter  0 to reducer 0, bloom filter 1 to reducer 1 and so on. one-one edge will most likely prevent auto-reduce parallelism from being applied for the scatter-gather edge. So need to see if we need a custom one-one broadcast edge for this.



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