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https://issues.apache.org/jira/browse/HBASE-22342?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16938275#comment-16938275
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Shardul Singh commented on HBASE-22342:
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Hi [~elserj] and [~jatsakthi], I need your expertise in this one.Problem is
quotaUsage is shows double for 10 minutes because of the conf
"hbase.master.quotas.region.report.retention.millis" default value.
So the solution which I came up is as follows:
1. I was thinking that we should not remove the region report if it is
split/merge from regionSize cache as we did in HBASE-22012.
2. Catalog Janitor can take up the responisbility of removing the region report
from the cache while deleting references for the merge/split region.
3. During master startup we can add a logic for Calculating the size of region
if it's a splitParent or mergeParent and put it in the cache if the region
state still exists in the cluster.
> space quota usage is calculated almost double then actual usage in case of
> Split /Merge of region
> -------------------------------------------------------------------------------------------------
>
> Key: HBASE-22342
> URL: https://issues.apache.org/jira/browse/HBASE-22342
> Project: HBase
> Issue Type: Bug
> Components: master
> Reporter: Ajeet Rai
> Assignee: Shardul Singh
> Priority: Minor
> Labels: quota, space
>
> space quota usage is calculated double for some time because it is
> considering the usage of the parent region report received earlier. This is
> normal behaviour because *hbase.master.quotas.region.report.retention.millis*
> is set as 10 minutes.It's not calculating the usage from the store files,
> it's taking the usage from the earlier report send to the master by the
> parent region server till 10 minutes.
> So after 10 minutes, it stops considering the earlier region report and quota
> is not violated
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