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From "Robert Chansler (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-3486) Change default for initial block report to 0 sec and document it in hadoop-defaults.xml
Date Tue, 01 Jul 2008 01:06:46 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-3486?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Robert Chansler updated HADOOP-3486:
------------------------------------

    Release Note: Changed the default value of dfs.blockreport.initialDelay to be 0 seconds.
 (was: The default value from for initial block report changes from 60sec to 0sec.)
    Hadoop Flags: [Incompatible change, Reviewed]  (was: [Reviewed, Incompatible change])

> Change default for initial block report to 0 sec and document it in hadoop-defaults.xml
> ---------------------------------------------------------------------------------------
>
>                 Key: HADOOP-3486
>                 URL: https://issues.apache.org/jira/browse/HADOOP-3486
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: dfs
>            Reporter: Sanjay Radia
>            Assignee: Sanjay Radia
>             Fix For: 0.18.0
>
>         Attachments: hadoopDefaults4Delay.patch, hadoopDefaults4Delay2.patch
>
>
> HADOOP-2326 added a new config parameter for the initial block report that gets sent
after DataNode registration.
> The default value for this parameter was 60 sec.
> This Jira changes the default to 0 sec -  the approriate default for 1 node or small
clusters (say  less than 50 nodes)
> This Jira also documents the config parameter in  hadoop-defaults.xml

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