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https://issues.apache.org/jira/browse/HBASE-22142?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16908514#comment-16908514
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Sakthi commented on HBASE-22142:
--------------------------------

Reviewing.

> Space quota: If table inside namespace having space quota is dropped, data 
> size  usage is still considered for the drop table.
> ------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: HBASE-22142
>                 URL: https://issues.apache.org/jira/browse/HBASE-22142
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 2.1.1
>            Reporter: Shardul Singh
>            Assignee: Shardul Singh
>            Priority: Minor
>              Labels: Quota, space
>         Attachments: HBASE-22142.branch-2.1.v001.patch
>
>
>  steps to follow:
> 1.create a quota at namespace level
> 2.create 2 tables t1 and t2 inside namespace and write data.
> 3.write 5 mb of data each in both t1 and t2.
> 4. drop t1.
> 5. data usage for t2 will be shown 10 mb for 10 minutes.
> If table is dropped inside namespace, data size  usage is still shown for 10 
> minutes because of the configuration 
> "hbase.master.quotas.region.report.retention.millis". This conf maintains the 
> region report in cache(regionSizes) and old entry is used for 10 minutes. We 
> can remove the entry from cache during the drop command as part of MasterCP 
> hook only, so that correct usage is show instantaneously after the drop 
> command.



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