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https://issues.apache.org/jira/browse/HADOOP-13704?focusedWorklogId=739174&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-739174
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ASF GitHub Bot logged work on HADOOP-13704:
-------------------------------------------
Author: ASF GitHub Bot
Created on: 09/Mar/22 22:42
Start Date: 09/Mar/22 22:42
Worklog Time Spent: 10m
Work Description: steveloughran commented on pull request #3978:
URL: https://github.com/apache/hadoop/pull/3978#issuecomment-1063453062
.. not deliberately ignoring this, just falling behind on reviews while i
try to get my manifest committer out the door. reviews there welcome, even
though it targets abfs and gcs. #2971
i will pull some of this back into the s3a committer afterwards, including
stat names and some IO enhancements to get parquet files writing faster
(disabling existence/overwrite checks in __magic dirs)
#3289
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Issue Time Tracking
-------------------
Worklog Id: (was: 739174)
Time Spent: 2h 20m (was: 2h 10m)
> S3A getContentSummary() to move to listFiles(recursive) to count children;
> instrument use
> -----------------------------------------------------------------------------------------
>
> Key: HADOOP-13704
> URL: https://issues.apache.org/jira/browse/HADOOP-13704
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs/s3
> Affects Versions: 2.8.0
> Reporter: Steve Loughran
> Priority: Minor
> Labels: pull-request-available
> Time Spent: 2h 20m
> Remaining Estimate: 0h
>
> Hive and a bit of Spark use {{getContentSummary()}} to get some summary stats
> of a filesystem. This is very expensive on S3A (and any other object store),
> especially as the base implementation does the recursive tree walk.
> Because of HADOOP-13208, we have a full enumeration of files under a path
> without directory costs...S3A can/should switch to this to speed up those
> places where the operation is called.
> Also
> * API call needs FS spec and contract tests
> * S3A could instrument invocation, so as to enable real-world popularity to
> be measured
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