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https://issues.apache.org/jira/browse/HADOOP-16202?focusedWorklogId=485113&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-485113
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ASF GitHub Bot logged work on HADOOP-16202:
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Author: ASF GitHub Bot
Created on: 16/Sep/20 12:40
Start Date: 16/Sep/20 12:40
Worklog Time Spent: 10m
Work Description: steveloughran commented on pull request #2168:
URL: https://github.com/apache/hadoop/pull/2168#issuecomment-693377950
+ plan to switch copyToLocal & distcp to openFile with sequential read
policy. This ensures that on clusters where the default policy has been set to
random will not see performance collapse here. It will be left to the
ORC/Parquet projects to consider when/how to move to this API too.
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Issue Time Tracking
-------------------
Worklog Id: (was: 485113)
Time Spent: 1h 10m (was: 1h)
> Enhance S3A openFile()
> ----------------------
>
> Key: HADOOP-16202
> URL: https://issues.apache.org/jira/browse/HADOOP-16202
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs/s3
> Affects Versions: 3.3.0
> Reporter: Steve Loughran
> Assignee: Steve Loughran
> Priority: Major
> Labels: pull-request-available
> Time Spent: 1h 10m
> 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.
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