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Posted to hdfs-dev@hadoop.apache.org by "Eric Badger (JIRA)" <ji...@apache.org> on 2016/05/25 15:56:12 UTC

[jira] [Created] (HDFS-10459) getTurnOffTip computes needed block incorrectly for threshold = 1

Eric Badger created HDFS-10459:
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             Summary: getTurnOffTip computes needed block incorrectly for threshold = 1
                 Key: HDFS-10459
                 URL: https://issues.apache.org/jira/browse/HDFS-10459
             Project: Hadoop HDFS
          Issue Type: Bug
            Reporter: Eric Badger


The fix added in HDFS-2002 only works in cases where threshold < 1, but not when threshold = 1. There is a '+1' added to the computation because of this assumption. I propose that instead of adding a '+1', we just set blockThreshold to be the ceiling of blocksTotal*threshold. Since we need to be >= blockThreshold to get out of safe mode, this will work. >14.9 is the same as =15, since blocks work in integer values. 



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