[jira] [Resolved] (HADOOP-15348) S3A Input Stream bytes read counter isn't getting through to StorageStatistics/instrumentation properly

["Steve Loughran (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HADOOP-15348?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Steve Loughran resolved HADOOP-15348.
-------------------------------------
    Fix Version/s: 3.4.0
       Resolution: Fixed

Fixed as part of HADOOP-17271

> S3A Input Stream bytes read counter isn't getting through to StorageStatistics/instrumentation properly
> -------------------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-15348
>                 URL: https://issues.apache.org/jira/browse/HADOOP-15348
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: fs/s3
>    Affects Versions: 3.0.0, 3.1.0
>            Reporter: Steve Loughran
>            Priority: Minor
>             Fix For: 3.4.0
>
>
> TL;DR: we should have common storage statistics for bytes read and bytes written, and S3A should use them in its instrumentation and have enum names to match.
> # in the S3AInputStream we call {{S3AInstrumentation.StreamStatistics.bytesRead(long)}}, which adds the amount to {{bytesRead}}, in a read(), readFully, or forward seek() reading in data
> # and in {{S3AInstrumentation.mergeInputStreamStatistics}}, that is pulled into streamBytesRead.
> # which has a Statistics name of ""stream_bytes_read"
> # but that is served up in the Storage statistics as "STREAM_SEEK_BYTES_READ", which is the wrong name.
> # and there isn't a common name for the counter across other filesystems.
> For now: people can use the wrong name in the enum; we may want to think about retaining it when adding the correct name. And maybe add a @Evolving/@LimitedPrivate scope pair to the enum



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