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Posted to issues@impala.apache.org by "Tim Armstrong (Jira)" <ji...@apache.org> on 2021/02/08 17:22:04 UTC

[jira] [Resolved] (IMPALA-3902) Multi-threaded query execution

     [ https://issues.apache.org/jira/browse/IMPALA-3902?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tim Armstrong resolved IMPALA-3902.
-----------------------------------
    Resolution: Fixed

Closing because it is now broadly usable for many use cases. There are some issues that might cause challenges for migration of complex workloads that I have moved to IMPALA-10486.

> Multi-threaded query execution
> ------------------------------
>
>                 Key: IMPALA-3902
>                 URL: https://issues.apache.org/jira/browse/IMPALA-3902
>             Project: IMPALA
>          Issue Type: Epic
>          Components: Backend
>    Affects Versions: Impala 2.6.0
>            Reporter: Marcel Kinard
>            Assignee: Tim Armstrong
>            Priority: Minor
>              Labels: multithreading
>
> Currently, a single query fragment is run in a quasi-single threaded manner on a node: the scanners are run in multiple threads, but all other operators (joins, aggregation) are run in the main thread.
> The goal is to add multi-threaded execution on a single node by running multiple fragment instances (each of which runs in a single thread).



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