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https://issues.apache.org/jira/browse/HADOOP-17139?focusedWorklogId=631836&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-631836
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ASF GitHub Bot logged work on HADOOP-17139:
-------------------------------------------
Author: ASF GitHub Bot
Created on: 30/Jul/21 18:46
Start Date: 30/Jul/21 18:46
Worklog Time Spent: 10m
Work Description: steveloughran commented on pull request #3101:
URL: https://github.com/apache/hadoop/pull/3101#issuecomment-890084772
Merged to trunk. Thank your for this @bogthe
it started off small, but you've now been sucked into the world of trying
strictly define the behavior of filesystems based on what HDFS does, and then
trying to reimplement a radically different version
for cloud storage performance. Yes, it's hard, but means that compatibility
is almost always guaranteed!
If you cherrypick to branch-3.3. do a test run and push up the new PR I'll
merge that without doing any more code reviews. The code is done, all we need
is a retest.
now, take the rest of the month off!
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Issue Time Tracking
-------------------
Worklog Id: (was: 631836)
Time Spent: 9h 50m (was: 9h 40m)
> Re-enable optimized copyFromLocal implementation in S3AFileSystem
> -----------------------------------------------------------------
>
> Key: HADOOP-17139
> URL: https://issues.apache.org/jira/browse/HADOOP-17139
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs/s3
> Affects Versions: 3.3.0, 3.2.1
> Reporter: Sahil Takiar
> Assignee: Bogdan Stolojan
> Priority: Minor
> Labels: pull-request-available
> Time Spent: 9h 50m
> Remaining Estimate: 0h
>
> It looks like HADOOP-15932 disabled the optimized copyFromLocal
> implementation in S3A for correctness reasons. innerCopyFromLocalFile should
> be fixed and re-enabled. The current implementation uses
> FileSystem.copyFromLocal which will open an input stream from the local fs
> and an output stream to the destination fs, and then call IOUtils.copyBytes.
> With default configs, this will cause S3A to read the file into memory, write
> it back to a file on the local fs, and then when the file is closed, upload
> it to S3.
> The optimized version of copyFromLocal in innerCopyFromLocalFile, directly
> creates a PutObjectRequest request with the local file as the input.
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