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From "Noble Paul (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (SOLR-10524) Explore in-memory partitioning for processing Overseer queue messages
Date Thu, 04 May 2017 21:36:04 GMT

     [ https://issues.apache.org/jira/browse/SOLR-10524?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Noble Paul updated SOLR-10524:
------------------------------
    Attachment: SOLR-10524.patch

[~caomanhdat] Looks good. 

This should be able to dramatically reduce the state update operations when overseer is under
heavy load

I have made the method {{Overseer#sortItems()}} as {{public static}} . Can you please write
simple JUnits to test the order of items produced by that method? 

[~dragonsinth] is it possible for u to take a look at the patch , especially the changes made
to {{DistributedQueue}}

> Explore in-memory partitioning for processing Overseer queue messages
> ---------------------------------------------------------------------
>
>                 Key: SOLR-10524
>                 URL: https://issues.apache.org/jira/browse/SOLR-10524
>             Project: Solr
>          Issue Type: Improvement
>      Security Level: Public(Default Security Level. Issues are Public) 
>            Reporter: Erick Erickson
>         Attachments: SOLR-10524.patch, SOLR-10524.patch
>
>
> There are several JIRAs (I'll link in a second) about trying to be more efficient about
processing overseer messages as the overseer can become a bottleneck, especially with very
large numbers of replicas in a cluster. One of the approaches mentioned near the end of SOLR-5872
(15-Mar) was to "read large no:of items say 10000. put them into in memory buckets and feed
them into overseer....".
> This JIRA is to break out that part of the discussion as it might be an easy win whereas
"eliminating the Overseer queue" would be quite an undertaking.



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