[jira] [Created] (HDFS-7896) HDFS Slow disk detection

[Arpit Agarwal (JIRA)]

Arpit Agarwal created HDFS-7896:
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             Summary: HDFS Slow disk detection
                 Key: HDFS-7896
                 URL: https://issues.apache.org/jira/browse/HDFS-7896
             Project: Hadoop HDFS
          Issue Type: New Feature
          Components: datanode
            Reporter: Arpit Agarwal


HDFS should detect slow disks. To start with we can flag this information via 
the NameNode web UI. Alternatively DNs can avoid using slow disks for writes.




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