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https://issues.apache.org/jira/browse/HADOOP-3748?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12613865#action_12613865
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Alejandro Abdelnur commented on HADOOP-3748:
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We have not profiled this in production environment.
I don't want to disable them (I can do that at job code level if I need to), I
just want to be able to get them at the end of each task instead incrementally.
We need to use 100 to 200 custom counters per job in a large cluster running
several concurrent jobs. I expect this will be a big hit, thus thie Jira.
> Flag to make tasks to send counter information only at the end of the task
> --------------------------------------------------------------------------
>
> 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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