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https://issues.apache.org/jira/browse/HADOOP-16202?focusedWorklogId=753417&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-753417
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ASF GitHub Bot logged work on HADOOP-16202:
-------------------------------------------
Author: ASF GitHub Bot
Created on: 06/Apr/22 14:07
Start Date: 06/Apr/22 14:07
Worklog Time Spent: 10m
Work Description: steveloughran commented on PR #2584:
URL: https://github.com/apache/hadoop/pull/2584#issuecomment-1090315539
testing,
* s3 london, markers keep, scale
* azure cardiff (to make sure I've not broken anything there in the move to
openFile() in distcp)
Issue Time Tracking
-------------------
Worklog Id: (was: 753417)
Time Spent: 16.5h (was: 16h 20m)
> Enhance openFile() for better read performance against object stores
> ---------------------------------------------------------------------
>
> Key: HADOOP-16202
> URL: https://issues.apache.org/jira/browse/HADOOP-16202
> Project: Hadoop Common
> Issue Type: Bug
> Components: fs, fs/s3, tools/distcp
> Affects Versions: 3.3.0
> Reporter: Steve Loughran
> Assignee: Steve Loughran
> Priority: Major
> Labels: pull-request-available
> Time Spent: 16.5h
> Remaining Estimate: 0h
>
> The {{openFile()}} builder API lets us add new options when reading a file
> Add an option {{"fs.s3a.open.option.length"}} which takes a long and allows
> the length of the file to be declared. If set, *no check for the existence of
> the file is issued when opening the file*
> Also: withFileStatus() to take any FileStatus implementation, rather than
> only S3AFileStatus -and not check that the path matches the path being
> opened. Needed to support viewFS-style wrapping and mounting.
> and Adopt where appropriate to stop clusters with S3A reads switched to
> random IO from killing download/localization
> * fs shell copyToLocal
> * distcp
> * IOUtils.copy
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