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https://issues.apache.org/jira/browse/HBASE-10873?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jimmy Xiang updated HBASE-10873:
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Attachment: hbase-10873_v3.patch
Attached patch v3 that uses only one configuration to control if assigning any
regions to backup masters, if so, the number of regions to assign to backup
masters relative to normal region servers. The default weight is 1, i.e. a
backup master is treated the same as a normal region server in region
assignment.
> 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
>
> Attachments: hbase-10873.patch, hbase-10873_v2.patch,
> hbase-10873_v3.patch
>
>
> 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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