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From "Yoram Arnon (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-514) namenode heartbeat interval should be configurable
Date Fri, 08 Sep 2006 05:56:23 GMT
    [ http://issues.apache.org/jira/browse/HADOOP-514?page=comments#action_12433334 ] 
            
Yoram Arnon commented on HADOOP-514:
------------------------------------

using the analogy of the animal kingdom - the larger the beast, the slower the heartbeat,
it would perhaps be optimal if the heartbeat interval were proportional to the size of the
cluster, rather than configurable.
One less config item, one less thing to get wrong.
namenode could inform datanodes what the cluster size is.
A formula such as interval=max(nodes/10, 1) seconds could work.

> 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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