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From "Yonik Seeley (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-12338) Replay buffering tlog in parallel
Date Thu, 17 May 2018 20:39:00 GMT

    [ https://issues.apache.org/jira/browse/SOLR-12338?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16479675#comment-16479675
] 

Yonik Seeley commented on SOLR-12338:
-------------------------------------

I haven't been following this issue, but the need to order things caught my eye, primarily
because we have a bunch of logic already that handles reordered updates.  I guess the issue
is that buffered updates may not have a version (if they haven't been through a leader?) 
If that's the case, perhaps an easier path would be to assign a version and then let the existing
reorder logic do it's thing.  I don't have the full picture here, so it's just some input
to consider.

> 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, 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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