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From "Doug Cutting (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-514) namenode heartbeat interval should be configurable
Date Fri, 08 Sep 2006 17:37:26 GMT
    [ http://issues.apache.org/jira/browse/HADOOP-514?page=comments#action_12433453 ] 
            
Doug Cutting commented on HADOOP-514:
-------------------------------------

I agree that the heartbeat should be configurable.  Setting it automatically would be nice.
 But we must not be careful to let the heartbeat interval get too long, as other actions are
dependent on it.  Currently block replications and deletions ride on heartbeat responses.
 So the heartbeat interval determines the speed of re-replication and deletion.

> namenode heartbeat interval should be configurable
> --------------------------------------------------
>
>                 Key: HADOOP-514
>                 URL: http://issues.apache.org/jira/browse/HADOOP-514
>             Project: Hadoop
>          Issue Type: Bug
>          Components: dfs
>            Reporter: Wendy Chien
>
> The namenode heartbeat interval is currently a constant in FSConstants.   It should be
configurable instead.  Things which currently rely on the heartbeat occuring fairly frequently
should be disassociated.    

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