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https://issues.apache.org/jira/browse/HADOOP-17531?focusedWorklogId=566411&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-566411
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ASF GitHub Bot logged work on HADOOP-17531:
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Author: ASF GitHub Bot
Created on: 15/Mar/21 17:27
Start Date: 15/Mar/21 17:27
Worklog Time Spent: 10m
Work Description: steveloughran commented on pull request #2732:
URL: https://github.com/apache/hadoop/pull/2732#issuecomment-799604167
Hey, I've realised that my auditing PR #2675 is going to clash on
CallableSupplier changes as its taking auditing spans in, activating them
before an after.
Can you restore the S3A callable stuff, alongside the copy you've made in
fs.impl? That will stop the PRs conflicting. Thanks
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Issue Time Tracking
-------------------
Worklog Id: (was: 566411)
Time Spent: 4.5h (was: 4h 20m)
> DistCp: Reduce memory usage on copying huge directories
> -------------------------------------------------------
>
> Key: HADOOP-17531
> URL: https://issues.apache.org/jira/browse/HADOOP-17531
> Project: Hadoop Common
> Issue Type: Improvement
> Reporter: Ayush Saxena
> Assignee: Ayush Saxena
> Priority: Critical
> Labels: pull-request-available
> Attachments: MoveToStackIterator.patch, gc-NewD-512M-3.8ML.log
>
> Time Spent: 4.5h
> Remaining Estimate: 0h
>
> Presently distCp, uses the producer-consumer kind of setup while building the
> listing, the input queue and output queue are both unbounded, thus the
> listStatus grows quite huge.
> Rel Code Part :
> https://github.com/apache/hadoop/blob/trunk/hadoop-tools/hadoop-distcp/src/main/java/org/apache/hadoop/tools/SimpleCopyListing.java#L635
> This goes on bredth-first traversal kind of stuff(uses queue instead of
> earlier stack), so if you have files at lower depth, it will like open up the
> entire tree and the start processing....
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