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Posted to issues@impala.apache.org by "Tim Armstrong (Jira)" <ji...@apache.org> on 2020/12/21 17:23:00 UTC

[jira] [Resolved] (IMPALA-8080) Improve planner to use disk attributes when applicable

     [ https://issues.apache.org/jira/browse/IMPALA-8080?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tim Armstrong resolved IMPALA-8080.
-----------------------------------
    Resolution: Later

> Improve planner to use disk attributes when applicable
> ------------------------------------------------------
>
>                 Key: IMPALA-8080
>                 URL: https://issues.apache.org/jira/browse/IMPALA-8080
>             Project: IMPALA
>          Issue Type: Improvement
>            Reporter: Janaki Lahorani
>            Priority: Major
>
> The disk seek time can vary depending on the underlying storage (Magnetic Disk, SSD, Flash etc) and the scan performance can change depending on the presence of buffer cache.  The plan generation, Degree of Parallelism, and scheduling should look at these aspects to decide on the appropriate course of action.



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