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https://issues.apache.org/jira/browse/AURORA-653?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14097848#comment-14097848
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Bill Farner commented on AURORA-653:
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How about if you add an instance to the job. Does that mean the value should
be 6? Ultimately this is a question of whether adding/removing instances is
changing the job configuration. The current behavior says "yes".
Perhaps the issue is with the health metric itself, how are you calculating the
numerator (instances running)?
> Make Job.instances value available through the IDL
> --------------------------------------------------
>
> Key: AURORA-653
> URL: https://issues.apache.org/jira/browse/AURORA-653
> Project: Aurora
> Issue Type: Story
> Components: Scheduler
> Reporter: Erik van Roode
>
> Why:
> I would like to be able to determine the health of an app, as in the ratio
> of how many instances are running
> and how many instances were configured to run (Job.instances).
> I can find the "Active" number in various places, but I cannot find the
> "Configured" anywhere.
> As far as I can tell every instance of "Instances/instanceCount" is actually
> the number of active jobs/tasks.
> Eg, JobConfiguration contains instanceCount, but it is not Job.instances.
> I created a job with 5 instances,
> killed one, and instanceCount dropped to 4.
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