Jiandan Yang created HDFS-14045:
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Summary: Use different metrics in DataNode to better measure
latency of heartbeat/blockReports/incrementalBlockReports of Active/Standby NN
Key: HDFS-14045
URL: https://issues.apache.org/jira/browse/HDFS-14045
Project: Hadoop HDFS
Issue Type: Improvement
Components: datanode
Reporter: Jiandan Yang
Currently DataNode uses same metrics to measure rpc latency of NameNode, but
Active and Standby usually have different performance at the same time,
especially in large cluster. For example, rpc latency of Standby is very long
when Standby is catching up editlog. We may misunderstand the state of HDFS.
Using different metrics for Active and standby can help us obtain more precise
metric data.
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