[jira] [Commented] (SOLR-11522) Suggestions/recommendations to rebalance replicas

["David Smiley (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SOLR-11522?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16647414#comment-16647414 ] 

David Smiley commented on SOLR-11522:
-------------------------------------

In this and in other commits like SOLR-12792, SOLR-12824 you've introduced default methods to MapWriter that seem fishy to me.  In particular the underscore methods like {{_get(...)}}.  This approach doesn't sit well with me.  I can understand why you might have added the underscore but I think the desire to do this should be a sign to reconsider the approach altogether.  I think methods should be added to MapWriter with care (same for SolrParams and NamedList).  [~noble.paul] can you please explain your thought process for this?  What's the next best alternative?

> 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}}



--
This message was sent by Atlassian JIRA
(v7.6.3#76005)

---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscribe@lucene.apache.org
For additional commands, e-mail: dev-help@lucene.apache.org