Need to document when combiner is used
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Key: PIG-1790
URL: https://issues.apache.org/jira/browse/PIG-1790
Project: Pig
Issue Type: Improvement
Components: documentation
Reporter: Olga Natkovich
Assignee: Olga Natkovich
Fix For: 0.9.0
I serached through the documentation but could not find a section that
describes the cases under which combiner is used. Since combiner has such a
significant impact on query performance, I think it is important to add this
information. Also, with 0.9 we are expending combiner usage so having
documentation would be useful for that as well.
Here are the JIRAs for combiner use slated for 0.9:
https://issues.apache.org/jira/browse/PIG-750
https://issues.apache.org/jira/browse/PIG-490
https://issues.apache.org/jira/browse/PIG-946
https://issues.apache.org/jira/browse/PIG-1735
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