Steve Loughran commented on HADOOP-13330:

it'll be fun handling failures in this world: if one delete batch fails, you 
need to block for all other outstanding deletes to complete, and update s3guard 
with the complete set of successful deletes

> s3a large subdir delete to do listObjects() and delete() calls in parallel
> --------------------------------------------------------------------------
>                 Key: HADOOP-13330
>                 URL: https://issues.apache.org/jira/browse/HADOOP-13330
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: fs/s3
>    Affects Versions: 2.8.0
>            Reporter: Steve Loughran
>            Priority: Minor
> When doing deletes of large directories/directory trees, paged list+delete 
> calls will be made. It would be faster if the delete and list calls were done 
> in parallel; the next listing batch obtained while the current batch was 
> being deleted.

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