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From "Mark Miller (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-6554) Speed up overseer operations for collections with stateFormat > 1
Date Mon, 01 Dec 2014 17:17:12 GMT

    [ https://issues.apache.org/jira/browse/SOLR-6554?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14230056#comment-14230056
] 

Mark Miller commented on SOLR-6554:
-----------------------------------

bq. or stateFormat = 1 has gone away

What kind of confidence do we have for stateFormat = 2 now? It would really be nice to drop
1 from 5x rather than deal with both for a full major version again.

> Speed up overseer operations for collections with stateFormat > 1
> -----------------------------------------------------------------
>
>                 Key: SOLR-6554
>                 URL: https://issues.apache.org/jira/browse/SOLR-6554
>             Project: Solr
>          Issue Type: Improvement
>          Components: SolrCloud
>    Affects Versions: 5.0, Trunk
>            Reporter: Shalin Shekhar Mangar
>         Attachments: SOLR-6554-batching-refactor.patch, SOLR-6554-batching-refactor.patch,
SOLR-6554-batching-refactor.patch, SOLR-6554-batching-refactor.patch, SOLR-6554.patch, SOLR-6554.patch,
SOLR-6554.patch, SOLR-6554.patch, SOLR-6554.patch, SOLR-6554.patch, SOLR-6554.patch, SOLR-6554.patch
>
>
> Right now (after SOLR-5473 was committed), a node watches a collection only if stateFormat=1
or if that node hosts at least one core belonging to that collection.
> This means that a node which is the overseer operates on all collections but watches
only a few. So any read goes directly to zookeeper which slows down overseer operations.
> Let's have the overseer node watch all collections always and never remove those watches
(except when the collection itself is deleted).



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