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From: "Ted Yu (JIRA)" <jira@apache.org>
To: issues@hbase.apache.org
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Subject: [jira] [Commented] (HBASE-8410) Basic quota support for namespaces
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    [ https://issues.apache.org/jira/browse/HBASE-8410?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13757002#comment-13757002 ] 

Ted Yu commented on HBASE-8410:
-------------------------------

If you compare https://builds.apache.org/job/PreCommit-HBASE-Build/7009//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-server.html#Warnings_MALICIOUS_CODE with https://builds.apache.org/job/PreCommit-HBASE-Build/7008//artifact/trunk/patchprocess/newPatchFindbugsWarningshbase-server.html#Warnings_MALICIOUS_CODE , you can easily see which two new warnings were introduced.
                
> 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
>
>
> 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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