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Posted to mapreduce-dev@hadoop.apache.org by "Tsuyoshi OZAWA (JIRA)" <ji...@apache.org> on 2013/05/09 03:46:14 UTC

[jira] [Created] (MAPREDUCE-5227) JobTrackerMetricsInst should standardize naming rules

Tsuyoshi OZAWA created MAPREDUCE-5227:
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             Summary: JobTrackerMetricsInst should standardize naming rules
                 Key: MAPREDUCE-5227
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5227
             Project: Hadoop Map/Reduce
          Issue Type: Improvement
          Components: mrv1
    Affects Versions: 1.1.2
            Reporter: Tsuyoshi OZAWA
            Assignee: Masahiro Nakagawa


JobTrackerMetricsInst provides users with some metrics, but its naming rules( "jobs_running", "running_maps", "running_reduces") sometimes confuses users. It should be standardized.

One concern is backward compatibility, so one idea is to share MetricMutableGaugeInt object from old and new property name.
e.g. to share runningMaps from "running_maps" and "maps_running".

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