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https://issues.apache.org/jira/browse/SOLR-11285?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16282341#comment-16282341
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Adrien Grand commented on SOLR-11285:
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[[email protected]] Is this issue good to be resolved?
> Support simulations at scale in the autoscaling framework
> ---------------------------------------------------------
>
> Key: SOLR-11285
> URL: https://issues.apache.org/jira/browse/SOLR-11285
> Project: Solr
> Issue Type: Improvement
> Security Level: Public(Default Security Level. Issues are Public)
> Components: AutoScaling
> Reporter: Andrzej Bialecki
> Assignee: Andrzej Bialecki
> Attachments: SOLR-11285.patch
>
>
> This is a spike to investigate how difficult it would be to modify the
> autoscaling framework so that it's possible to run simulated large-scale
> experiments and test its dynamic behavior without actually spinning up a
> large cluster.
> Currently many components rely heavily on actual Solr, ZK and behavior of ZK
> watches, or insist on making actual HTTP calls. Notable exception is the core
> Policy framework where most of the ZK / Solr details are abstracted.
> As the algorithms for autoscaling that we implement become more and more
> complex the ability to effectively run multiple large simulations will be
> crucial - it's very easy to unknowingly introduce catastrophic instabilities
> that don't manifest themselves in regular unit tests.
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