Flag to make tasks to send counter information only at the end of the task
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Key: HADOOP-3748
URL: https://issues.apache.org/jira/browse/HADOOP-3748
Project: Hadoop Core
Issue Type: Improvement
Components: mapred
Environment: all
Reporter: Alejandro Abdelnur
Currently counters are streaming from the task to the jobtracker as the task
progresses. If the number of counters is large this has a significant impact on
the network traffic as well as in the JobTracker load.
The should be a flag, for example by counter-group, that indicates that the
counters are to be reported at the end of the task. By default this flag should
be set to false for all counter-groups maintaining the current behavior.
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