[HBASE-8410] Basic quota support for namespaces

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.0.0
• Labels: Quota
• Hadoop Flags: Reviewed

Release Note

Namespace auditor provides basic quota support for namespaces in terms of number of tables and number of regions. In order to use namespace quotas, quota support must be enabled by setting
"hbase.quota.enabled" property to true in hbase-site.xml file.

The users can add quota information to namespace, while creating new namespaces or by altering existing ones.

Examples:
1. create_namespace 'ns1', {'hbase.namespace.quota.maxregions'=>'10'}
2. create_namespace 'ns2', {'hbase.namespace.quota.maxtables'=>'2','hbase.namespace.quota.maxregions'=>'5'}
3. alter_namespace 'ns3', {METHOD => 'set', 'hbase.namespace.quota.maxtables'=>'5','hbase.namespace.quota.maxregions'=>'25'}

The quotas can be modified/added to namespace at any point of time. To remove quotas, the following command can be used:

alter_namespace 'ns3', {METHOD => 'unset', NAME => 'hbase.namespace.quota.maxtables'}
alter_namespace 'ns3', {METHOD => 'unset', NAME => 'hbase.namespace.quota.maxregions'}

• Assignee: Vandana Ayyalasomayajula
• Reporter: Francis Christopher Liu
• Created: 23/Apr/13 23:18
• Updated: 16/Jun/22 05:46
• Resolved: 24/Jan/15 21:35

Description

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.

Issue Links

• breaks: HBASE-13394 Failed to recreate a table when quota is enabled
• is related to: HBASE-10994 HBase Multi-Tenancy
• relates to: HBASE-13593 Quota support for namespace should take snapshot restore and clone into account
• relates to: HBASE-13357 If maxTables/maxRegions exceeds quota in a namespace, throw QuotaExceededException
• relates to: HBASE-14259 Backport Namespace quota support to 98 branch