Aravindan Vijayan created AMBARI-15749:
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Summary: Add AMS post processing function to show the metrics
'diff' over time.
Key: AMBARI-15749
URL: https://issues.apache.org/jira/browse/AMBARI-15749
Project: Ambari
Issue Type: Task
Affects Versions: 2.2.2
Reporter: Aravindan Vijayan
Assignee: Aravindan Vijayan
Priority: Critical
Fix For: 2.4.0
The use case is that, e.g. user wants to know how frequently the containers are
allocated over time. Currently, the num of allocated containers is an
aggregated value, so it's always a monotonically increasing line chart.
To show how frequently the containers are allocated, currently we do have a
'rate' option on the UI. But the way that is calculated is ( NumContainers@T2 -
NumContainers@T1) / (T2 - T1)(in seconds). This results in decimal values on
the UI.
Here, the use case is to just show the num 'diff' here, instead of dividing it
by time interval.
With this change, I can change the Grafana UI to use bar chart.
Each bar represents the number of containers allocated between the the time
interval (time interval here is the width of the bar)
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