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Posted to common-issues@hadoop.apache.org by "Steve Loughran (JIRA)" <ji...@apache.org> on 2018/01/25 06:11:00 UTC

[jira] [Created] (HADOOP-15191) Add Private/Unstable BulkDelete operations to FS/S3A for DistCP

Steve Loughran created HADOOP-15191:
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             Summary: Add Private/Unstable BulkDelete operations to FS/S3A for DistCP
                 Key: HADOOP-15191
                 URL: https://issues.apache.org/jira/browse/HADOOP-15191
             Project: Hadoop Common
          Issue Type: Sub-task
          Components: fs/s3, tools/distcp
    Affects Versions: 2.9.0
            Reporter: Steve Loughran


Large scale DistCP with the -delete option doesn't finish in a viable time because of the final CopyCommitter doing a 1 by 1 delete of all missing files. This isn't randomized (the list is sorted), and it's throttled by AWS.

If bulk deletion of files was exposed as an API, distCP would do 1/1000 of the REST calls, so not get throttled.

Proposed: add an initially private/unstable interface for stores, {{BulkDelete}} which declares a page size and offers a {{bulkDelete(List<Path>)}} operation for the bulk deletion.



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