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

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

     [ https://issues.apache.org/jira/browse/HIVE-21279?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Vineet Garg reassigned HIVE-21279:
----------------------------------


> 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
>            Priority: Major
>             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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