Enhance datanode to read data and checksum file in parallel
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Key: HDFS-1034
URL: https://issues.apache.org/jira/browse/HDFS-1034
Project: Hadoop HDFS
Issue Type: Improvement
Reporter: dhruba borthakur
Assignee: dhruba borthakur
In the current HDFS implementation, a read of a block issued to the datanode
results in a disk access to the checksum file followed by a disk access to the
checksum file. It would be nice to be able to do these two IOs in parallel to
reduce read latency.
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