change the open method in ClientProtocol to take an additional argument:
clientMachine
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Key: HADOOP-842
URL: http://issues.apache.org/jira/browse/HADOOP-842
Project: Hadoop
Issue Type: Improvement
Components: dfs
Affects Versions: 0.9.2
Reporter: Hairong Kuang
Assigned To: Hairong Kuang
Fix For: 0.10.0
The open method returns a list of blocks that belong to a file and, for each
block, a list of datanodes that contain the block.To improve reading
efficiency, I'd like to return the list of datanodes in the order of its
distance to the client machine. So I suggest that we make the open method to
take an additional argument clientMachine which is in the format of
hostname:port#.
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