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https://issues.apache.org/jira/browse/HDFS-15510?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17179106#comment-17179106
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Íñigo Goiri commented on HDFS-15510:
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The situation is a little tricky...
It may make sense to go for something like #2 and evenly distribute the quota
across the destinations.
So in your case, you set it to 10, we set 5 to one destination and 5 to the
other.
If you have say 3 locations and set it to 20, one could set each to 7, 7 and 6.
It has the issue that some might get unbalanced but I think is the best we can
do.
Then we could even rebalance the quotas with the quota service if needed.
[~linyiqun] any thoughts on this?
> 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
> Attachments: 15510.png
>
>
> 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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