Handle map output buffers better
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Key: HADOOP-1965
URL: https://issues.apache.org/jira/browse/HADOOP-1965
Project: Hadoop
Issue Type: Improvement
Components: mapred
Reporter: Devaraj Das
Assignee: Amar Kamat
Today, the map task stops calling the map method while sort/spill is using the
(single instance of) map output buffer. One improvement that can be done to
improve performance of the map task is to have another buffer for writing the
map outputs to, while sort/spill is using the first buffer.
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