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https://issues.apache.org/jira/browse/HBASE-8410?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13760589#comment-13760589
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Ted Yu commented on HBASE-8410:
-------------------------------

+1, provided that the following javadoc warning is fixed:
{code}
[WARNING] 
/Users/tyu/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/NamespaceDescriptorRetriever.java:38:
 warning - @param argument "The" is not a parameter name.
{code}
                
> 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_1_trunk.patch, HBASE_8410.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
>
>
> 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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