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https://issues.apache.org/jira/browse/SOLR-11522?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16627461#comment-16627461
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ASF subversion and git services commented on SOLR-11522:
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Commit a514392ccfa39c54d745be1dce1a1febdc92bae6 in lucene-solr's branch
refs/heads/branch_7x from [~noble.paul]
[ https://git-wip-us.apache.org/repos/asf?p=lucene-solr.git;h=a514392 ]
SOLR-11522: /autoscaling/suggestions now include rebalance options as well even
if there are no violations
> Suggestions/recommendations to rebalance replicas
> -------------------------------------------------
>
> Key: SOLR-11522
> URL: https://issues.apache.org/jira/browse/SOLR-11522
> Project: Solr
> Issue Type: Sub-task
> Security Level: Public(Default Security Level. Issues are Public)
> Components: AutoScaling
> Reporter: Noble Paul
> Priority: Major
>
> It is possible that a cluster is unbalanced even if it is not breaking any of
> the policy rules. Some nodes may have very little load while some others may
> be heavily loaded. So, it is possible to move replicas around so that the
> load is more evenly distributed. This is going to be driven by preferences.
> The way we arrive at these suggestions is going to be as follows
> # Sort the nodes according to the given preferences
> # Choose a replica from the most loaded node ({{source-node}})
> # try adding them to the least loaded node ({{target-node}})
> # See if it breaks any policy rules. If yes , try another {{target-node}}
> (go to #3)
> # If no policy rules are being broken, present this as a {{suggestion}} .
> The suggestion contains the following information
> #* The {{source-node}} and {{target-node}} names
> #* The actual v2 command that can be run to effect the operation
> # Go to step #1
> # Do this until the a replicas can be moved in such a way that the {{target
> node}} is more loaded than the {{source-node}}
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