[AMBARI-14882] AMS aggregates Counter values as average over the timeseries (and other issues)

• Type: Task
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 2.0.0
• Fix Version/s: 2.2.2
• Component/s: ambari-metrics
• Assignee: Siddharth Wagle
• Reporter: Siddharth Wagle
• Created: 02/Feb/16 17:52
• Updated: 03/Feb/16 05:55
• Resolved: 03/Feb/16 00:39

Description

Current behavior:
We store the difference between two points if the metric is a counter without dividing by the time difference (Assumes fixed sampling frequency, 10 seconds for Hadoop daemons). This is similar to the Ganglia sink implementation.

Expected behavior:

• Store raw data with type = COUNTER and provide aggregate function called ._rate to calculate rate on demand.
• We need to make sure type attribute on the METRIC_RECORD data capture COUNTER / GAUGE. The HadoopMetricsSink needs to change to send this value.

Issue Links

• links to: Review board