[jira] [Created] (HDFS-14814) RBF: The quota should be set the same as the nearest parent in Global Quota.

["Jinglun (Jira)" <ji...@apache.org>]

Jinglun created HDFS-14814:
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             Summary: RBF: The quota should be set the same as the nearest parent in Global Quota.
                 Key: HDFS-14814
                 URL: https://issues.apache.org/jira/browse/HDFS-14814
             Project: Hadoop HDFS
          Issue Type: Improvement
            Reporter: Jinglun
            Assignee: Jinglun


I want to add a rule 'The quota should be set the same as the nearest parent' to Global Quota. Supposing we have the mount table below.

 
||src||destinations||quota||
|/dir-a|ns0->/dir-a|  \{nquota=10,squota=20}|
|/dir-a/dir-b|ns1->/dir-b|{nquota=-1,squota=30}|
|/dir-a/dir-b/dir-c|ns2->/dir-c|{nquota=-1,squota=-1}|
|/dir-d|ns3->/dir-d|{nquota=-1,squota=-1}|

 

The quota for the remote locations on the namespaces should be:
ns0->/dir-a \{nquota=10,squota=20}
ns1->/dir-b \{nquota=10,squota=30}
ns2->/dir-c \{nquota=10,squota=30}
ns3->/dir-d \{nquota=-1,squota=-1}

The quota of the remote location is set the same as the corresponding MountTable, and if there is no quota of the MountTable then the quota is set to the nearest parent MountTable with quota.

It's easy to implement it. In RouterQuotaUpdateService each time we compute the currentQuotaUsage, we can get the quota info for each MountTable. We can do a
check and fix all the MountTable which's quota doesn't match the rule above.



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