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From "Ted Yu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-17758) [RSGROUP] Add shell command to move servers and tables at the same time
Date Sat, 11 Mar 2017 01:48:04 GMT

    [ https://issues.apache.org/jira/browse/HBASE-17758?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15905993#comment-15905993

Ted Yu commented on HBASE-17758:

I think it is desirable to implement the proposed operation atomically - meaning servers and
tables are moved at the same time, not in two operations.

> [RSGROUP] Add shell command to move servers and tables at the same time
> -----------------------------------------------------------------------
>                 Key: HBASE-17758
>                 URL: https://issues.apache.org/jira/browse/HBASE-17758
>             Project: HBase
>          Issue Type: New Feature
>          Components: rsgroup
>    Affects Versions: 2.0.0
>            Reporter: Guangxu Cheng
>            Assignee: Guangxu Cheng
>         Attachments: HBASE-17758-v1.patch, HBASE-17758-v2.patch
> Currently add a new group perform the following steps:
> {code:javascript}
> hbase(main):001:0> add_rsgroup 'mygroup'
> Took 0.3840 seconds
> hbase(main):002:0> move_servers_rsgroup 'mygroup',['hbase-rs-01:16030','hbase-rs-02:16030']
> Took 3.5040 seconds
> hbase(main):003:0> move_tables_rsgroup 'mygroup',['example']
> Took 0.2710 seconds
> {code}
> 1. move_servers_rsgroup will unassign all regions on hbase-rs-01 and hbase-rs-02
> 2. move_tables_rsgroup will also reassign all the regions of the table example.
> This will lead to a large number of regions to migrate and affect the data locality.
> However, some regions of the table that are distributed on hbase-rs-01 and hbase-rs-02,
do not need to be moved.
> So,we need a new shell command *move_servers_tables_rsgroup* which minimizes the number
of regions needed to move.

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