[jira] [Created] (AMBARI-14524) HDFS Recommendation: dfs.datanode.du.reserved should be set to 10%-15% of volume size

["Dmytro Sen (JIRA)" <ji...@apache.org>]

Dmytro Sen created AMBARI-14524:
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             Summary: HDFS Recommendation: dfs.datanode.du.reserved should be set to 10%-15% of volume size
                 Key: AMBARI-14524
                 URL: https://issues.apache.org/jira/browse/AMBARI-14524
             Project: Ambari
          Issue Type: Bug
          Components: stacks
    Affects Versions: 2.1.0
            Reporter: Dmytro Sen
            Assignee: Dmytro Sen
            Priority: Critical
             Fix For: 2.4.0


d we get into a bad state with not enough nodemanagers being up. At this point the admin tries to run the balancer and hope that it will balance very quickly.
There should be a recommendation on this value based on the disk space available in the datanode volume. In addition, if the user sets it too low there should be a warning saying this will cause problems if enough buffer is not kept.



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