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From Martin Mituzas <xietao1...@hotmail.com>
Subject why does not hdfs read ahead ?
Date Tue, 24 Nov 2009 07:23:22 GMT

I read the code and find the call
DFSInputStream.read(buf, off, len)
will cause the DataNode read len bytes (or less if encounting the end of
block) , why does not hdfs read ahead to improve performance for sequential
read?
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