[jira] [Updated] (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

["Tianying Chang (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HBASE-8836?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tianying Chang updated HBASE-8836:
----------------------------------

    Attachment: hbase-8836.patch

This is the first draft, with some unnecessary LOG.info and so on still there. I want to upload this first version to get some feedback before I make refinement of the code. I also have Performance Evaluation number from running on a real cluster, which meet my expectation for improving the write throughput. I will upload the data later also. 
                
> 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
>
>         Attachments: hbase-8836.patch
>
>
> 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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