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From "Marvin Justice (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-6035) CloudSolrServer directUpdate routing should use getCoreUrl
Date Wed, 30 Apr 2014 18:34:15 GMT

    [ https://issues.apache.org/jira/browse/SOLR-6035?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13985896#comment-13985896
] 

Marvin Justice commented on SOLR-6035:
--------------------------------------

We see average indexing times drop from 9.2 ms to 6.7 ms. The overall timing distribution
has a smaller tail for the patched version with stddev dropping from 15.4 ms to 9.0 ms.

Good point about replication, I didn't actually test that. This work was done on our "alpha"
cluster which is 64 shards on 16 nodes spread across 4 machines but with no replication.

> CloudSolrServer directUpdate routing should use getCoreUrl 
> -----------------------------------------------------------
>
>                 Key: SOLR-6035
>                 URL: https://issues.apache.org/jira/browse/SOLR-6035
>             Project: Solr
>          Issue Type: Improvement
>          Components: SolrCloud
>            Reporter: Marvin Justice
>            Assignee: Joel Bernstein
>            Priority: Minor
>              Labels: performance
>         Attachments: SOLR-6035.patch
>
>
> In a multisharded node environment we were seeing forward-to-leader hops when using CloudSolrServer
directUpdate (with the hop being on the same node) . Consequently, there was no improvement
in indexing performance over non-directUpdate. 
> Changing buildUrlMap to use getCoreUrl eliminated the extra hop and now we see a dramatic
improvement in performance.



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