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From "Andrzej Bialecki (JIRA)" <>
Subject [jira] [Commented] (SOLR-13427) Support simulating the execution of autoscaling suggestion
Date Tue, 30 Apr 2019 13:39:00 GMT


Andrzej Bialecki  commented on SOLR-13427:

[~mkhludnev] yes, sorry, I'll fix it shortly.

> Support simulating the execution of autoscaling suggestion
> ----------------------------------------------------------
>                 Key: SOLR-13427
>                 URL:
>             Project: Solr
>          Issue Type: Improvement
>      Security Level: Public(Default Security Level. Issues are Public) 
>          Components: AutoScaling
>            Reporter: Andrzej Bialecki 
>            Assignee: Andrzej Bialecki 
>            Priority: Major
>             Fix For: 8.1, master (9.0)
>         Attachments: SOLR-13427.patch
> It's not always clear what would be the final state of the cluster after applying the
suggested changes (obtained from {{/autoscaling/suggestions}}), especially on a large and
busy cluster where several autoscaling rules have to be considered.
> This issue proposes to use the simulation framework for simulating the effects of the
> First, the simulator would be initialized from the current state of a real cluster. Then
it would run several rounds of simulated execution of suggestions until there were either
no more suggestions (the cluster would be perfectly balanced) or the iteration count limit
was reached.
> This simulation could be executed using either the deployed autoscaling config or one
provided by the user, which would make it easier to test the effects of various configurations
on the cluster layout.
> Support for this functionality would be integrated into the existing {{SolrCLI autoscaling}}

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