Andrzej Bialecki created SOLR-13427:
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Summary: Support simulating the execution of autoscaling suggestion
Key: SOLR-13427
URL: https://issues.apache.org/jira/browse/SOLR-13427
Project: Solr
Issue Type: Improvement
Security Level: Public (Default Security Level. Issues are Public)
Components: AutoScaling
Reporter: Andrzej Bialecki
Assignee: Andrzej Bialecki
Fix For: master (9.0)
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 suggestions.
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}} tool.
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