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Type:
New Feature
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Status: Closed
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Priority:
Major
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Resolution: Fixed
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Affects Version/s: None
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Fix Version/s: 0.19.0
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Component/s: None
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Labels:None
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Environment:
all
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Hadoop Flags:Reviewed
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Release Note:
On the same input, we usually need to run multiple Maps one after the other without no Reduce. We also have to run multiple Maps after the Reduce.
If all pre-Reduce Maps are chained together and run as a single Map a significant amount of Disk I/O will be avoided.
Similarly all post-Reduce Maps can be chained together and run in the Reduce phase after the Reduce.
- incorporates
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HADOOP-3927 Be able to create a Configuration out an stream (with config XML content)
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- Closed
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