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Posted to common-dev@hadoop.apache.org by "Todd Lipcon (JIRA)" <ji...@apache.org> on 2012/07/19 02:58:34 UTC

[jira] [Created] (HADOOP-8608) Add Configuration API for parsing time durations

Todd Lipcon created HADOOP-8608:
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             Summary: Add Configuration API for parsing time durations
                 Key: HADOOP-8608
                 URL: https://issues.apache.org/jira/browse/HADOOP-8608
             Project: Hadoop Common
          Issue Type: Improvement
          Components: conf
    Affects Versions: 3.0.0
            Reporter: Todd Lipcon


Hadoop has a lot of configurations which specify durations or intervals of time. Unfortunately these different configurations have little consistency in units - eg some are in milliseconds, some in seconds, and some in minutes. This makes it difficult for users to configure, since they have to always refer back to docs to remember the unit for each property.

The proposed solution is to add an API like {{Configuration.getTimeDuration}} which allows the user to specify the units with a prefix. For example, "10ms", "10s", "10m", "10h", or even "10d". For backwards-compatibility, if the user does not specify a unit, the API can specify the default unit, and warn the user that they should specify an explicit unit instead.

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