[jira] [Resolved] (SOLR-16475) Ability to change the default replica placement plugin though sysProp

["Jan Høydahl (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SOLR-16475?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jan Høydahl resolved SOLR-16475.
--------------------------------
    Fix Version/s: 9.2
       Resolution: Fixed

> Ability to change the default replica placement plugin though sysProp
> ---------------------------------------------------------------------
>
>                 Key: SOLR-16475
>                 URL: https://issues.apache.org/jira/browse/SOLR-16475
>             Project: Solr
>          Issue Type: Improvement
>      Security Level: Public(Default Security Level. Issues are Public) 
>            Reporter: Jan Høydahl
>            Assignee: Jan Høydahl
>            Priority: Major
>             Fix For: 9.2
>
>          Time Spent: 5h 20m
>  Remaining Estimate: 0h
>
> The default placement plugin is "Simple", and to change it you need to edit {{clusterprops.json}} in zookeeper, as specified in https://solr.apache.org/guide/solr/latest/configuration-guide/replica-placement-plugins.html.
> The proposal is to be able to statically specify the default placement plugin to use as a system property or env.var, e.g.
> {code:java}
> solr start -c -Dsolr.defaultPlacementPlugin=affinity {code}
> or
> {code:java}
> SOLR_DEFAULT_PLACEMENT_PLUGIN=affinity solr start -c {code}
> This will only change the *default* plugin to use instead of 'simple'. If users configure another plugin in clusterprops.json then things will work as today, that the explicitly configured plugin is used instead of the default.
> This makes it easy to spin up Solr in Docker or with the solr-operator, using a different placement plugin default.



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