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https://issues.apache.org/jira/browse/HADOOP-17074?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Steve Loughran resolved HADOOP-17074.
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Fix Version/s: 3.3.1
Resolution: Fixed
> Optimise s3a Listing to be fully asynchronous.
> ----------------------------------------------
>
> Key: HADOOP-17074
> URL: https://issues.apache.org/jira/browse/HADOOP-17074
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: fs/s3
> Affects Versions: 3.3.0
> Reporter: Mukund Thakur
> Assignee: Mukund Thakur
> Priority: Major
> Fix For: 3.3.1
>
>
> Listing api returns a Remote iterator. Currently it is blocking in the
> constructor Listing class. Also it is done in batches, so if a batch is
> exhausted , the next batch will be fetched from s3
> thus causing small pauses on the client side every time a batch is fetched.
> We can add the following optimisations to fix these:
> * Make the constructor list call to s3 asynchronous.
> * Fetch the next batch asynchronously while the current batch is getting
> processed.
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