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From "Arpit Agarwal (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-9847) HDFS configuration without time unit name should accept friendly time units
Date Thu, 24 Mar 2016 16:32:25 GMT

    [ https://issues.apache.org/jira/browse/HDFS-9847?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15210509#comment-15210509
] 

Arpit Agarwal commented on HDFS-9847:
-------------------------------------

bq. This is the WARN for missing units? It should warn, shouldn't it? The calls specifying
TimeUnit.SECONDS are for backwards compatibility, and would otherwise be in millis. The changes
to hdfs-default.xml should include units (changing their type) in this release, then we can
change the caller after users have been warned for using values without units.
Okay. it will be confusing for administrators to start seeing these warnings post-upgrade
if they are not relying on the defaults in {{hdfs-default.xml}}. Not sure what is the right
thing to do here, if you feel the warning is warranted then let's keep it.

> HDFS configuration without time unit name should accept friendly time units
> ---------------------------------------------------------------------------
>
>                 Key: HDFS-9847
>                 URL: https://issues.apache.org/jira/browse/HDFS-9847
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>    Affects Versions: 2.7.1
>            Reporter: Lin Yiqun
>            Assignee: Lin Yiqun
>         Attachments: HDFS-9847-nothrow.001.patch, HDFS-9847.001.patch, HDFS-9847.002.patch,
HDFS-9847.003.patch, HDFS-9847.004.patch, HDFS-9847.005.patch, HDFS-9847.006.patch, timeduration-w-y.patch
>
>
> In HDFS-9821, it talks about the issue of leting existing keys use friendly units e.g.
60s, 5m, 1d, 6w etc. But there are som configuration key names contain time unit name, like
{{dfs.blockreport.intervalMsec}}, so we can make some other configurations which without time
unit name to accept friendly time units. The time unit  {{seconds}} is frequently used in
hdfs. We can updating this configurations first.



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