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From "WangYuan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-17983) control region numbers when create table to improve performance
Date Tue, 02 May 2017 09:38:04 GMT

    [ https://issues.apache.org/jira/browse/HBASE-17983?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15992632#comment-15992632
] 

WangYuan commented on HBASE-17983:
----------------------------------

Thank you.
I read HBASE-8410, It's a good issue,but I understand issue's point of view is different.

One is the RegionServer level to control average Region number, one is the overall control
of the NameSpace level.

For example: in our cluster RegionServer average load of Region increased from 200 then 500
then 1000, single read and write performance will increase from 5ms  then 10ms   then 100ms.
I don't want to go down.

But  HBASE-8410 should not explain the relationship between RegionServer and Region numbers
in it .
Because the number of RegionServer nodes can be increased (When data increases or table numbers
increases), I want to control the average number of region load ,rather than total table numbers
or region numbers.



> control region numbers when create table to improve performance
> ---------------------------------------------------------------
>
>                 Key: HBASE-17983
>                 URL: https://issues.apache.org/jira/browse/HBASE-17983
>             Project: HBase
>          Issue Type: Improvement
>          Components: Admin, Client
>    Affects Versions: 2.0.0
>            Reporter: WangYuan
>            Priority: Minor
>             Fix For: 2.0.0
>
>         Attachments: HBASE-17983-control-region-numbers-when-create-table.patch
>
>
> I found that with the increasing number of regions in every RegionServer , HBase read
and write performance decreased, and failed to achieve the desired performance. Therefore,
we hope to control the number of regions in every RegionServer , and add the judgment before
creating tables.
> I can set up a region parameter in hbase-default.xml, hbase.client.region.averageload.numbers,
when the client builds a table that exceeds the value of this parameter, throws an exception.



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