Hanisha Koneru created HDFS-11299:
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Summary: Support multiple Datanode File IO hooks
Key: HDFS-11299
URL: https://issues.apache.org/jira/browse/HDFS-11299
Project: Hadoop HDFS
Issue Type: Improvement
Components: hdfs
Reporter: Hanisha Koneru
Assignee: Hanisha Koneru
HDFS-10958 introduces instrumentation hooks around DataNode disk IO and
HDFS-10959 adds support for profiling hooks to expose latency statistics.
Instead of choosing only one hook using Config parameters, we want to add two
separate hooks - one for profiling and one for fault injection. The fault
injection hook will be useful for testing purposes.
This jira only introduces support for fault injection hook. The implementation
for that will come later on.
Also, now Default and Counting FileIOEvents would not be needed as we can
control enabling the profiling and fault injection hooks using config
parameters.
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