[jira] [Assigned] (HBASE-25078) QuotaRefresherChore doesn't update the User RPC Throttle quota effectively

["Pankaj Kumar (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HBASE-25078?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Pankaj Kumar reassigned HBASE-25078:
------------------------------------

    Assignee: Pankaj Kumar

> QuotaRefresherChore doesn't update the User RPC Throttle quota effectively
> --------------------------------------------------------------------------
>
>                 Key: HBASE-25078
>                 URL: https://issues.apache.org/jira/browse/HBASE-25078
>             Project: HBase
>          Issue Type: Improvement
>          Components: Quotas
>            Reporter: Pankaj Kumar
>            Assignee: Pankaj Kumar
>            Priority: Minor
>
> Currently RegionServer record a user on their first RPC and trigger the QuotaCache refresh,
>  https://github.com/apache/hbase/blob/8a6299bb387aaedcdab05224a462e63cd121fbb0/hbase-server/src/main/java/org/apache/hadoop/hbase/quotas/QuotaCache.java#L136
> And QuotaRefresherChore refresh quota periodically for those users who are recorded by RegionServer on their first RPC, 
> https://github.com/apache/hbase/blob/8a6299bb387aaedcdab05224a462e63cd121fbb0/hbase-server/src/main/java/org/apache/hadoop/hbase/quotas/QuotaCache.java#L284
>  
> So even though user quota is set but it will be updated when user send RPC. Here each user will get 1 extra RPC in each RegionServer life and same will continue when got restarted. 
>  
> We can enhance this by doing narrow scan on quota table to get the user specific quota



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