Todd Lipcon created HDFS-3343:
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Summary: Improve metrics for DN read latency
Key: HDFS-3343
URL: https://issues.apache.org/jira/browse/HDFS-3343
Project: Hadoop HDFS
Issue Type: Improvement
Components: data-node
Reporter: Todd Lipcon
Similar to HDFS-3170 on the write side, we should improve the metrics that are
generated on the DN for read latency. We should have separate metrics for the
time spent in {{transferTo}} vs {{waitWritable}} so that it's easy to
distinguish slow local disks from slow readers on the other end of the socket.
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