Arpit Agarwal created HDFS-9821:
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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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