Steve Loughran created HADOOP-19455:
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             Summary: S3A: support metrics publishers
                 Key: HADOOP-19455
                 URL: https://issues.apache.org/jira/browse/HADOOP-19455
             Project: Hadoop Common
          Issue Type: Sub-task
          Components: fs/s3
    Affects Versions: 3.4.1
            Reporter: Steve Loughran


Add options to enable logging and Cloudwatch metrics

always turn on logging metrics but log at trace, so never evaluated or visible 
unless requested.

Cloudwatch would be interesting but complicated, because lots of config. Also 
it should be a singleton: first configuration wins.

Whoever wants cloudwatch gets to implement that themselves with docs and tests 
(how?)

https://sdk.amazonaws.com/java/api/latest/software/amazon/awssdk/metrics/LoggingMetricPublisher.html








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