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https://issues.apache.org/jira/browse/HBASE-16961?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15991268#comment-15991268
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Josh Elser commented on HBASE-16961:
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bq. Well one thing that immediately comes to mind is list_quota_snapshots and
list_quota_violations should have the same output format. The difference is
filtering applied to the latter.
Not really, actually. The former is polling the quota table to list the
recorded quota "snapshot" objects. This snapshot includes the space usage, the
space limit, and the quota policy (if the use is greater than the limit).
The latter command (list_quota_violations) is asking a specific regionserver
for the list of quotas that are in violation on that regionserver. The more I
think about it, the latter is just not generally useful for operators (only
useful when there is a bug and we are investigating why some regionserver is
not rejecting requests).
Regardless of the usefulness, the extra columns missing on
list_quota_violations might be due to an internal change (RS's used to only see
the violation policy or nothing -- they see the full snapshot now).
> FileSystem Quotas
> -----------------
>
> Key: HBASE-16961
> URL: https://issues.apache.org/jira/browse/HBASE-16961
> Project: HBase
> Issue Type: New Feature
> Reporter: Josh Elser
> Assignee: Josh Elser
> Attachments: hbase-quota-test.sh
>
>
> Umbrella issue for tracking the filesystem utilization of HBase data,
> defining quotas on that utilization, and enforcement when utilization exceeds
> the limits of the quota.
> At a high level: we can define quotas on tables and namespaces. Region size
> is computed by RegionServers and sent to the Master. The Master inspects the
> sizes of Regions, rolling up to table and namespace sizes. Defined quotas in
> the quota table are evaluated given the computed sizes, and, for those
> tables/namespaces violating the quota, RegionServers are informed to take
> some action to limit any further filesystem growth by that table/namespace.
> Discuss:
> https://lists.apache.org/thread.html/66a4b0c3725b5cbdd61dd6111c43847adaeef7b7da5f4cd045df30ef@%3Cdev.hbase.apache.org%3E
> Design Doc:
> http://home.apache.org/~elserj/hbase/FileSystemQuotasforApacheHBase.pdf or
> https://docs.google.com/document/d/1VtLWDkB2tpwc_zgCNPE1ulZOeecF-YA2FYSK3TSs_bw/edit?usp=sharing
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