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From "Jimmy Xiang (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-10873) Control number of regions assigned to backup masters
Date Mon, 31 Mar 2014 16:55:18 GMT
Jimmy Xiang created HBASE-10873:
-----------------------------------

             Summary: Control number of regions assigned to backup masters
                 Key: HBASE-10873
                 URL: https://issues.apache.org/jira/browse/HBASE-10873
             Project: HBase
          Issue Type: Improvement
          Components: Balancer
            Reporter: Jimmy Xiang
            Assignee: Jimmy Xiang
             Fix For: 0.99.0


By default, a backup master is treated just like another regionserver. So it can host as many
regions as other regionserver does. When the backup master becomes the active one, region
balancer needs to move those user regions on this master to other region servers. To minimize
the impact, it's better not to assign too many regions on backup masters. It may not be good
to leave the backup masters idle and not host any region either.

We should make this adjustable so that users can control how many regions to assign to each
backup master.



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