[jira] [Commented] (SOLR-4449) Enable backup requests for the internal solr load balancer

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[jira] [Commented] (SOLR-4449) Enable backup requests for the internal solr load balancer

Sebastian Nagel (Jira)

    [ https://issues.apache.org/jira/browse/SOLR-4449?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13747646#comment-13747646 ]

Isaac Hebsh commented on SOLR-4449:
-----------------------------------

And, as i asked in the duplicated issue SOLR-5092, the code contains a comment that says it's important to "use the same replica for all phases of a distributed request."

I don't think it's important, because it might happen even without this plugin, if one replica goes down between two phases of the request.

Do you have any thoughts/conclusions about this?
               

> Enable backup requests for the internal solr load balancer
> ----------------------------------------------------------
>
>                 Key: SOLR-4449
>                 URL: https://issues.apache.org/jira/browse/SOLR-4449
>             Project: Solr
>          Issue Type: New Feature
>          Components: SolrCloud
>            Reporter: philip hoy
>            Priority: Minor
>         Attachments: patch-4449.txt, SOLR-4449.patch, SOLR-4449.patch, SOLR-4449.patch, solr-back-request-lb-plugin.jar
>
>
> Add the ability to configure the built-in solr load balancer such that it submits a backup request to the next server in the list if the initial request takes too long. Employing such an algorithm could improve the latency of the 9xth percentile albeit at the expense of increasing overall load due to additional requests.

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