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Posted to dev@hive.apache.org by "Vineet Garg (JIRA)" <ji...@apache.org> on 2019/02/15 23:35:00 UTC

[jira] [Created] (HIVE-21279) Avoid moving/rename operation in FileSink op for SELECT queries

Vineet Garg created HIVE-21279:
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             Summary: Avoid moving/rename operation in FileSink op for SELECT queries
                 Key: HIVE-21279
                 URL: https://issues.apache.org/jira/browse/HIVE-21279
             Project: Hive
          Issue Type: Improvement
          Components: Query Planning
            Reporter: Vineet Garg
            Assignee: Vineet Garg
             Fix For: 4.0.0
         Attachments: HIVE-21279.1.patch

Currently at the end of a job FileSink operator moves/rename temp directory to another directory from which FetchTask fetches result. This is done to avoid fetching potential partial/invalid files by failed/runway tasks. This operation is expensive for cloud storage. It could be avoided if FetchTask is passed on set of files to read from instead of whole directory.



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