[jira] [Commented] (SOLR-12739) Make autoscaling policy based replica placement the default strategy for placing replicas

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[jira] [Commented] (SOLR-12739) Make autoscaling policy based replica placement the default strategy for placing replicas

JIRA jira@apache.org

    [ https://issues.apache.org/jira/browse/SOLR-12739?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16645914#comment-16645914 ]

Shalin Shekhar Mangar commented on SOLR-12739:
----------------------------------------------

Thanks Steve. This one wasn't 100% reproducible. It breaks due to bad assumptions on the cluster layout. I changed the test to use the legacy assignment strategy because we don't necessarily need the new strategy to test the feature itself.

{code}
SOLR-12739: Use legacy assignment in AutoAddReplicasPlanActionTest

master: http://git-wip-us.apache.org/repos/asf/lucene-solr/commit/971a0e3f
branch_7x: http://git-wip-us.apache.org/repos/asf/lucene-solr/commit/d921fe50
{code}

> Make autoscaling policy based replica placement the default strategy for placing replicas
> -----------------------------------------------------------------------------------------
>
>                 Key: SOLR-12739
>                 URL: https://issues.apache.org/jira/browse/SOLR-12739
>             Project: Solr
>          Issue Type: Improvement
>      Security Level: Public(Default Security Level. Issues are Public)
>          Components: AutoScaling, SolrCloud
>            Reporter: Shalin Shekhar Mangar
>            Assignee: Shalin Shekhar Mangar
>            Priority: Major
>             Fix For: 7.6, master (8.0)
>
>         Attachments: SOLR-12739.patch, SOLR-12739.patch, SOLR-12739.patch, SOLR-12739.patch, SOLR-12739.patch
>
>
> Today the default placement strategy is the same one used since Solr 4.x which is to select nodes on a round robin fashion. I propose to make the autoscaling policy based replica placement as the default policy for placing replicas.
> This is related to SOLR-12648 where even though we have default cluster preferences, we don't use them unless a policy is also configured.



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