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https://issues.apache.org/jira/browse/HADOOP-19364?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ahmar Suhail updated HADOOP-19364:
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Parent Issue: HADOOP-19559 (was: HADOOP-19363)
> S3A Analytics-Accelerator: Add IoStatistics support
> ---------------------------------------------------
>
> Key: HADOOP-19364
> URL: https://issues.apache.org/jira/browse/HADOOP-19364
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs/s3
> Reporter: Ahmar Suhail
> Priority: Major
>
> S3A provides InputStream statistics:
> [https://github.com/apache/hadoop/blob/trunk/hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/statistics/S3AInputStreamStatistics.java]
> This helps track things like how many bytes were read from a stream etc.
>
> The current integration does not currently implement statistics. To start off
> with we should identify which of these statistics makes sense for us track in
> the new stream. Some examples are:
>
> 1/ bytesRead
> 2/ readOperationStarted
> 3/ initiateGetRequest
>
> Some of these (1 and 2) are more straightforward, and should not require any
> changes to analytics-accelerator-s3, but tracking GET requests will require
> this.
> We should also add tests that make assertions on these statistics. See
> ITestS3APrefetchingInputStream for an example to do this.
> And see https://issues.apache.org/jira/browse/HADOOP-18190 for how this was
> done on the prefetching stream, and PR:
> https://github.com/apache/hadoop/pull/4458
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