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From "Otis Gospodnetic (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-8836) Separate reader and writer thread pool in RegionServer, so that write throughput will not be impacted when the read load is very high
Date Fri, 28 Jun 2013 23:40:20 GMT

    [ https://issues.apache.org/jira/browse/HBASE-8836?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13695924#comment-13695924
] 

Otis Gospodnetic commented on HBASE-8836:
-----------------------------------------

Have you run any test and have any numbers to show how much impact this has?
I'm wondering how well this works if the underlying server/IO is actually maxed out.  In such
situation, can separating writes from reads help?

                
> Separate reader and writer thread pool in RegionServer, so that write throughput will
not be impacted when the read load is very high
> -------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: HBASE-8836
>                 URL: https://issues.apache.org/jira/browse/HBASE-8836
>             Project: HBase
>          Issue Type: New Feature
>          Components: Performance, regionserver
>    Affects Versions: 0.94.8
>            Reporter: Tianying Chang
>            Assignee: Tianying Chang
>             Fix For: 0.94.8
>
>
> We found that when the read load on a specific RS is high, the write throughput also
get impacted dramatically, and even cause write data loss sometimes. We want to prioritize
the write by putting them in a separate queue from the read request, so that slower read will
not make fast write wait nu-necessarily long.

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