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From "Arpit Agarwal (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-9821) HDFS configuration should accept friendly time units
Date Wed, 17 Feb 2016 22:19:18 GMT
Arpit Agarwal created HDFS-9821:
-----------------------------------

             Summary: HDFS configuration should accept friendly time units
                 Key: HDFS-9821
                 URL: https://issues.apache.org/jira/browse/HDFS-9821
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: datanode, namenode
    Affects Versions: 2.8.0
            Reporter: Arpit Agarwal


HDFS configuration keys that define time intervals use units inconsistently (Hours, seconds,
milliseconds).

Not all keys have the unit as part of their name. Related keys may use different units e.g.
{{dfs.blockreport.intervalMsec}} is configured in msec but {{dfs.blockreport.initialDelay}}
is configured in seconds. Milliseconds is rarely useful as a time unit which makes these values
hard to parse when reading config files.

We can either
# Allow existing keys using friendly units e.g. 60s, 5m, 1d, 6w etc. This can be done compatibly
since there will be no conflict with existing valid configuration.
# Just deprecate the existing keys and define new ones that accept friendly units.



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