[jira] [Updated] (HIVE-8042) Optionally allow move tasks to run in parallel

["Gunther Hagleitner (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-8042?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Gunther Hagleitner updated HIVE-8042:
-------------------------------------
    Attachment: HIVE-8042.1.patch

> Optionally allow move tasks to run in parallel
> ----------------------------------------------
>
>                 Key: HIVE-8042
>                 URL: https://issues.apache.org/jira/browse/HIVE-8042
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Gunther Hagleitner
>            Assignee: Gunther Hagleitner
>         Attachments: HIVE-8042.1.patch
>
>
> hive.exec.parallel allows one to run different stages of a query in parallel. However that applies only to map-reduce tasks. When using large multi insert queries there are many MoveTasks that are all executed in sequence on the client. There's no real reason for that - they could be run in parallel as well (i.e.: the stage graph captures the dependencies and knows which tasks can happen in parallel)
> Proposal here is to create a new config var:
> hive.exec.parallel.movetask
> When set to true it run movetasks in parallel also.



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