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From "Zhijie Shen (JIRA)" <j...@apache.org>
Subject [jira] [Created] (YARN-3881) Writing RM cluster-level metrics
Date Thu, 02 Jul 2015 19:16:04 GMT
Zhijie Shen created YARN-3881:

             Summary: Writing RM cluster-level metrics
                 Key: YARN-3881
                 URL: https://issues.apache.org/jira/browse/YARN-3881
             Project: Hadoop YARN
          Issue Type: Sub-task
          Components: timelineserver
            Reporter: Zhijie Shen
            Assignee: Zhijie Shen

RM has a bunch of metrics that we may want to write into the timeline backend to. I attached
the metrics.json that I've crawled via {{http://localhost:8088/jmx?qry=Hadoop:*}}. IMHO, we
need to pay attention to three groups of metrics:

1. QueueMetrics
2. JvmMetrics
3. ClusterMetrics

The problem is that unlike other metrics belongs to a single application, these ones belongs
to RM or cluster-wide. Therefore, current write path is not going to work for these metrics
because they don't have the associated user/flow/app context info. We need to rethink of modeling
cross-app metrics and the api to handle them.

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