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From "Cao Manh Dat (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-12338) Replay buffering tlog in parallel
Date Thu, 10 May 2018 09:03:00 GMT

    [ https://issues.apache.org/jira/browse/SOLR-12338?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16470110#comment-16470110
] 

Cao Manh Dat commented on SOLR-12338:
-------------------------------------

Attached a patch for this ticket, here are some notes:
- Thanks to {{OrderedExecutor}}, all updates belong to same docId, it will be executed sequentially.
Updates belong to different docId, will be executed in parallel.
- The patch adds a new test in TestRecovery, which ensure that even updates are executed in
parallel we will have the same index as before.

> Replay buffering tlog in parallel
> ---------------------------------
>
>                 Key: SOLR-12338
>                 URL: https://issues.apache.org/jira/browse/SOLR-12338
>             Project: Solr
>          Issue Type: Improvement
>      Security Level: Public(Default Security Level. Issues are Public) 
>            Reporter: Cao Manh Dat
>            Assignee: Cao Manh Dat
>            Priority: Major
>         Attachments: SOLR-12338.patch, SOLR-12338.patch
>
>
> Since updates with different id are independent, therefore it is safe to replay them
in parallel. This will significantly reduce recovering time of replicas in high load indexing
environment. 



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