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From Thanh Do <than...@cs.wisc.edu>
Subject experience with Backup Node
Date Thu, 05 May 2011 16:28:28 GMT
hi all,

any body deploy the Backup Node in your system.
I am curious about the impact of the Backup Node
to the NameNode throughput.

To my understanding, NameNode streams edits
log operation to the BackupNode (by an RPC call),
and only return once that operation has been applied
to the in memory state of the Backup Node.

Will this RPC call slow down the NameNode a little bit.


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