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From "stack (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-8410) Basic quota support for namespaces
Date Fri, 21 Mar 2014 21:11:54 GMT

    [ https://issues.apache.org/jira/browse/HBASE-8410?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13943551#comment-13943551
] 

stack commented on HBASE-8410:
------------------------------

bq. Also as I understood stack's suggestion, we can have namespace auditor running on master
and region servers but on region servers, it would only ask permission of master in the pre-split
hook. 

Pardon me Vandana.  I should have been more clear.  I was suggesting that you do not need
to have a process on the regionserver if you want to prevent splitting.  A process running
on the master only should be sufficient.

> Basic quota support for namespaces
> ----------------------------------
>
>                 Key: HBASE-8410
>                 URL: https://issues.apache.org/jira/browse/HBASE-8410
>             Project: HBase
>          Issue Type: Sub-task
>            Reporter: Francis Liu
>            Assignee: Vandana Ayyalasomayajula
>         Attachments: HBASE-8410.docx, HBASE-8410_trunk_10.patch, HBASE-8410_trunk_10.patch,
HBASE-8410_trunk_11.patch, HBASE-8410_trunk_12.patch, HBASE-8410_trunk_13.patch, HBASE-8410_trunk_14.patch,
HBASE-8410_trunk_15.patch, HBASE-8410_trunk_2.patch, HBASE-8410_trunk_3.patch, HBASE-8410_trunk_4.patch,
HBASE-8410_trunk_4.patch, HBASE-8410_trunk_5.patch, HBASE-8410_trunk_6.patch, HBASE-8410_trunk_7.patch,
HBASE-8410_trunk_8.patch, HBASE-8410_trunk_9.patch, HBASE_8410.patch, HBASE_8410_1_trunk.patch
>
>
> This task involves creating an observer which provides basic quota support to namespaces
in terms of (1) number of tables and (2) number of regions. The quota support can be enabled
by setting:
> <property>
>     <name>hbase.coprocessor.region.classes</name>
>     <value>org.apache.hadoop.hbase.namespace.NamespaceController</value>
> </property>
> <property>
>     <name>hbase.coprocessor.master.classes</name>
>     <value>org.apache.hadoop.hbase.namespace.NamespaceController</value>
> </property>
> in the hbase-site.xml.
> To add quotas to namespace, while creating namespace properties need to be added.
> Examples:
> 1. namespace_create 'ns1', {'hbase.namespace.quota.maxregion'=>'10'}
> 2. 1. namespace_create 'ns2', {'hbase.namespace.quota.maxtables'=>'2'}, {'hbase.namespace.quota.maxregion'=>'5'}
> The quotas can be modified/added to namespace at any point of time. 



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