Xiaoqiao He created HDFS-15242:
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Summary: Add metrics for operations hold lock times of
FsDatasetImpl
Key: HDFS-15242
URL: https://issues.apache.org/jira/browse/HDFS-15242
Project: Hadoop HDFS
Issue Type: Improvement
Components: datanode
Reporter: Xiaoqiao He
Assignee: Xiaoqiao He
Some operations of FsDatasetImpl need to hold Lock, and sometimes it costs long
time to execute since it include IO operation in Lock. I propose to add metrics
for this operations then it could be more convenient for monitor and dig
bottleneck.
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