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https://issues.apache.org/jira/browse/HBASE-17758?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15905537#comment-15905537
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Guangxu Cheng commented on HBASE-17758:
---------------------------------------
if the moveServers() fails, servers will be belong to new group. Maybe it's a
little better to throw an exception to user.
such as
{code}
} catch (IOException ioe) {
LOG.warn("Move servers to original group failed.", ioe);
throw new IOException("Move tables to new group failed and servers still in
new group.");
}
{code}
[~yuzhih...@gmail.com], what's your suggestion?Thanks
> [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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