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From André Oriani <ra078...@students.ic.unicamp.br>
Subject Avatar Datanodes
Date Tue, 10 Aug 2010 03:04:29 GMT
Hi all,

I was studying the code of HDFS-976 and Dhruba's overview about Avatar Nodes
(
http://hadoopblog.blogspot.com/2010/02/hadoop-namenode-high-availability.html)
when some questions came to my mind.  If I understood correctly, avatar
datanodes send heartbeats, block reports and block received messages to both
avatar namenodes. Does both avatar namenodes send DataCommands back ? If so,
how contradictory commands are avoided? What would be the impact of
forwarding messages to a third, fourth,...  namenode ?

Thanks and Regards,
André Oriani

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