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https://issues.apache.org/jira/browse/HADOOP-19455?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Steve Loughran updated HADOOP-19455:
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    Description: 
Add options to enable logging

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






  was:
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







> S3A: SDK client to log metrics at trace
> ---------------------------------------
>
>                 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
>            Assignee: Steve Loughran
>            Priority: Minor
>
> Add options to enable logging
> 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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