Colin Patrick McCabe created HDFS-5430:
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             Summary: Support TTL on CacheBasedPathDirectives
                 Key: HDFS-5430
                 URL: https://issues.apache.org/jira/browse/HDFS-5430
             Project: Hadoop HDFS
          Issue Type: Sub-task
            Reporter: Colin Patrick McCabe
            Priority: Minor


It would be nice if CacheBasedPathDirectives would support an expiration time, 
after which they would be automatically removed by the NameNode.  This time 
would probably be in wall-block time for the convenience of system 
administrators.



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