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From "Robert Chansler (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-2444) NameNnode shoud give the Datanodes a parameter that specifies the backoff time for initial block reports
Date Tue, 25 Mar 2008 03:03:25 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-2444?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Robert Chansler updated HADOOP-2444:
------------------------------------

    Fix Version/s:     (was: 0.17.0)

> NameNnode shoud give the Datanodes a parameter that specifies the backoff time for initial
block reports
> --------------------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-2444
>                 URL: https://issues.apache.org/jira/browse/HADOOP-2444
>             Project: Hadoop Core
>          Issue Type: Sub-task
>          Components: dfs
>            Reporter: Sanjay Radia
>
> HADOOP-2326 adds a random backoff for the initial block reports.  This however is static
config parameter.
> It would be useful to have the NN tell the DN how much to backoff (i.e. rather than a
single configuration parameter for the backoff). This would allow the system to adjust automatically
to cluster size - smaller clusters will startup faster than larger clusters.

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