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From "Hairong Kuang" <hair...@yahoo-inc.com>
Subject dfs datanode heartbeats and getBlockwork requests
Date Mon, 03 Apr 2006 20:52:02 GMT
Currently dfs datanodes send heartbeats and getBlockwork requests to the
namenode at the same frequency (once every 3 seconds) after certain startup
time. Is there any design reason that we need two seperate messages instead
of one? I am thinking that if we let a sendHeartbeat request return the
blocks to be deleted or replicated, we are able to cut the network traffic
in dfs.

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