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https://issues.apache.org/jira/browse/HDFS-15510?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17176129#comment-17176129
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Hemanth Boyina commented on HDFS-15510:
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{quote}The issue here seems to be that the general one is not accounted
correctly, we would need to fix that.
{quote}
for an example : if we set namespace quota as 10 on mount entry with 2
destinations , for the both destinations we set quota as 10 each and in mount
table store for the mount entry we set namespace quota as 10 which is not
correct
> RBF: Quota and Content Summary was not correct in Multiple Destinations
> -----------------------------------------------------------------------
>
> Key: HDFS-15510
> URL: https://issues.apache.org/jira/browse/HDFS-15510
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Hemanth Boyina
> Assignee: Hemanth Boyina
> Priority: Critical
>
> steps :
> *) create a mount entry with multiple destinations ( for suppose 2)
> *) Set NS quota as 10 for mount entry by dfsrouteradmin command, Content
> Summary on the Mount Entry shows NS quota as 20
> *) Create 10 files through router, on creating 11th file , NS Quota Exceeded
> Exception is coming
> though the Content Summary showing the NS quota as 20 , we are not able to
> create 20 files
>
> the problem here is router stores the mount entry's NS quota as 10 , but
> invokes NS quota on both the name services by set NS quota as 10 , so content
> summary on mount entry aggregates the content summary of both the name
> services by making NS quota as 20
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