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From "Jerry He (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-16305) Multi threaded scan performance bottlenecked on Connection
Date Fri, 29 Jul 2016 18:44:20 GMT

    [ https://issues.apache.org/jira/browse/HBASE-16305?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15399836#comment-15399836
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Jerry He commented on HBASE-16305:
----------------------------------

Is it re-creatable via the PerformanceEvaluation tool? There is a '--oneCon=true or false'
option for multi-threaded runs.

> Multi threaded scan performance bottlenecked on Connection
> ----------------------------------------------------------
>
>                 Key: HBASE-16305
>                 URL: https://issues.apache.org/jira/browse/HBASE-16305
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Elliott Clark
>
> Pretty simple repro. On a single region server host ~10 or more regions. Then for each
region spawn a thread that starts a scan. Try an pull the scan as fast as possible.
> If all the scans are created through the same connection then it's slow. If all the scans
are created through different connections then the scan speed is doubled.
> Since we recommend a single connection per application this is pretty surprising behavior.



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