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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