Use identity mapper in a chain of M-R jobs
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Key: PIG-480
URL: https://issues.apache.org/jira/browse/PIG-480
Project: Pig
Issue Type: Improvement
Affects Versions: types_branch
Reporter: Olga Natkovich
Fix For: types_branch
For jobs with two or more MR jobs, use identity mapper wherever possible in
second and subsequent MR jobs. Identity mapper is about 50% than pig empty map
job because it doesn't parse the data.
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