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From "Elliott Clark (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-13682) Compute HDFS locality in parallel.
Date Wed, 13 May 2015 18:44:00 GMT
Elliott Clark created HBASE-13682:
-------------------------------------

             Summary: Compute HDFS locality in parallel.
                 Key: HBASE-13682
                 URL: https://issues.apache.org/jira/browse/HBASE-13682
             Project: HBase
          Issue Type: Bug
            Reporter: Elliott Clark


Right now when the balancer needs to know about region locality it asks the cache in serial.
When the cache is empty or expired it goes to the NN.

On larger clusters with lots of blocks this can be really slow. That means that balancer is
un-usable while masters are being restarted.



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