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