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https://issues.apache.org/jira/browse/HADOOP-13171?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16291545#comment-16291545
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Steve Loughran commented on HADOOP-13171:
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No fundamental reason; they really just evolved so we could see what the read
performance issues where with seeks& aborts, so the streams.toString() prints
them. The upload stuff is more collecting useful stuff on a system.
if you can see value in aggregating them all.: do it.
One thing: the input stream stats aren't collected in the live stream, so
there's no performance hit of using them; it's only in the close() that they
get pulled up. For the write stuff (and committer code) everything is done
through the atomic longs
> Add StorageStatistics to S3A; instrument some more operations
> -------------------------------------------------------------
>
> Key: HADOOP-13171
> URL: https://issues.apache.org/jira/browse/HADOOP-13171
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs/s3
> Affects Versions: 2.8.0
> Reporter: Steve Loughran
> Assignee: Steve Loughran
> Priority: Minor
> Fix For: 2.8.0, 3.0.0-alpha1
>
> Attachments: HADOOP-13171-014.patch, HADOOP-13171-016.patch,
> HADOOP-13171-branch-2-001.patch, HADOOP-13171-branch-2-002.patch,
> HADOOP-13171-branch-2-003.patch, HADOOP-13171-branch-2-004.patch,
> HADOOP-13171-branch-2-005.patch, HADOOP-13171-branch-2-006.patch,
> HADOOP-13171-branch-2-007.patch, HADOOP-13171-branch-2-008.patch,
> HADOOP-13171-branch-2-009.patch, HADOOP-13171-branch-2-010.patch,
> HADOOP-13171-branch-2-011.patch, HADOOP-13171-branch-2-012.patch,
> HADOOP-13171-branch-2-013.patch, HADOOP-13171-branch-2-015.patch,
> HADOOP-13171-branch-2.8-017.patch
>
>
> Add {{StorageStatistics}} support to S3A, collecting the same metrics as the
> instrumentation, but sharing across all instances.
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