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https://issues.apache.org/jira/browse/SOLR-12338?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16475965#comment-16475965
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Cao Manh Dat commented on SOLR-12338:
-------------------------------------
Interesting result, when I change from {{SetBlockingQueue}} to guava Striped
class (its implementation is like an array of lock). The performance is
decreased (from 4341ms to 8227ms), if I increase the number of stripes (size of
the lock array) to {{numThreads * 1000}}, they will eventually run in the same
amount of time. It is a sign that collision does affect the performance!
> 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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