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From "Cao Manh Dat (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-12338) Replay buffering tlog in parallel
Date Thu, 17 May 2018 14:29:00 GMT

    [ https://issues.apache.org/jira/browse/SOLR-12338?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16479131#comment-16479131
] 

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

bq. BTW I've twice gotten confused in this issue conversation when you referred to things
I didn't know existed before because it was unclear if I simply didn't know about it or if
you were adding/introducing some new mechanism. It would be helpful to me if you try to clarify
that new things are new things, e.g. "(added in this patch)" or "added a new ..." or some-such.
Yeah, sorry about that, I was just to lazy with the detail.

bq. It's super tempting to simply use Striped as it's difficult to write & review concurrent
control structures such as this. I have a bunch of pending commentary/review for your SetBlockingQueue
but are you choosing to not use it because the numThreads * 1000 is too much internal memory/waste?
I think current {{SetBlockingQueue}} is quite effective and compact. Can you mention some
comments/reviews for {{SetBlockingQueue}}?


> 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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