DFSClient read performance can be improved by stagerring connection setup to
datanode(s)
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Key: HDFS-575
URL: https://issues.apache.org/jira/browse/HDFS-575
Project: Hadoop HDFS
Issue Type: Improvement
Components: hdfs client
Reporter: dhruba borthakur
The DFS client opens a socket connection to a DN for the n-th block, fetches
n-th block from that datanode and then opens socket connections to the datanode
that contains the n+1th block. Sequential-reads might show performance
improvements if the setting up of socket connections to the datanode containing
the n+1th block can happen in parallel while the data for the nth block is
being fetched. The amount of improvement, if any, has to be measured.
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