Datanode xceiver protocol should allow reuse of a connection
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Key: HDFS-941
URL: https://issues.apache.org/jira/browse/HDFS-941
Project: Hadoop HDFS
Issue Type: Improvement
Components: data-node, hdfs client
Affects Versions: 0.22.0
Reporter: Todd Lipcon
Right now each connection into the datanode xceiver only processes one
operation.
In the case that an operation leaves the stream in a well-defined state (eg a
client reads to the end of a block successfully) the same connection could be
reused for a second operation. This should improve random read performance
significantly.
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