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https://issues.apache.org/jira/browse/AMBARI-21214?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16054523#comment-16054523
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Aravindan Vijayan commented on AMBARI-21214:
--------------------------------------------
Pushed to branch-3.0-ams
> Use a uuid vs long row key for metrics in AMS schema
> ----------------------------------------------------
>
> Key: AMBARI-21214
> URL: https://issues.apache.org/jira/browse/AMBARI-21214
> Project: Ambari
> Issue Type: Bug
> Components: ambari-metrics
> Affects Versions: 3.0.0
> Reporter: Aravindan Vijayan
> Assignee: Aravindan Vijayan
> Fix For: 3.0.0
>
> Attachments: AMBARI-21214.patch
>
>
> Presently we store (metircName, hostname, serverTime, appId, instanceId) for
> every row.
> Although this makes SQL query easy to write, it adds duplication when storing
> it in the Regions memory.
> We should have a unique integer ID for an application-instance metric on a
> host and use that as a lookup table with a write through cache when inserting
> or reading data in the METRIC_RECORD table.
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