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https://issues.apache.org/jira/browse/HADOOP-5083?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12666297#action_12666297
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Arun C Murthy commented on HADOOP-5083:
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bq. When it's standalone, then it should certainly be started separately. But I
think, for simplicity and back-compatibility, the default behavior might be for
it to continue to run within the JobTracker JVM.
+1, we both concur.
> Optionally a separate daemon should serve JobHistory
> ----------------------------------------------------
>
> Key: HADOOP-5083
> URL: https://issues.apache.org/jira/browse/HADOOP-5083
> Project: Hadoop Core
> Issue Type: Improvement
> Components: mapred
> Reporter: Arun C Murthy
> Assignee: Amar Kamat
> Attachments: HADOOP-5083-v1.2.patch
>
>
> Currently the JobTracker serves the JobHistory to end-users off files
> local-disk/hdfs. While running very large clusters with a large user-base
> might result in lots of traffic for job-history which needlessly taxes the
> JobTracker. The proposal is to have an optional daemon which handles serving
> of job-history requests.
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