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From "Yu Li (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-17159) Improve the assignment plan when server aborted or creating tables, etc.
Date Wed, 23 Nov 2016 04:06:58 GMT

    [ https://issues.apache.org/jira/browse/HBASE-17159?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15688840#comment-15688840
] 

Yu Li commented on HBASE-17159:
-------------------------------

Seems clear enough, please prepare a patch, thanks. [~xharlie]

> Improve the assignment plan when server aborted or creating tables, etc.
> ------------------------------------------------------------------------
>
>                 Key: HBASE-17159
>                 URL: https://issues.apache.org/jira/browse/HBASE-17159
>             Project: HBase
>          Issue Type: New Feature
>          Components: Balancer, Region Assignment
>    Affects Versions: 2.0.0, 1.2.4
>            Reporter: Charlie Qiangeng Xu
>
> When master processing a dead serve or creating a new table, the assignment plan would
be generated based on the roundRobinAssignment method of balancer.
> Yet if these operations happen a lot, the cluster would be out of balance both on table
level and server level. Balancer would be triggered and may cause huge amount of region moves(
This is what we observed).
> Ideally, the assignment should be able to consider the table or cluster level balance
as well as locality(for the case of dead server). 
>  



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