Rohini Palaniswamy created PIG-5260:
---------------------------------------
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.
--
This message was sent by Atlassian JIRA
(v6.4.14#64029)
