[jira] [Resolved] (SPARK-42779) Allow V2 writes to indicate advisory partition size

["Dongjoon Hyun (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-42779?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Dongjoon Hyun resolved SPARK-42779.
-----------------------------------
    Fix Version/s: 3.5.0
       Resolution: Fixed

Issue resolved by pull request 40421
[https://github.com/apache/spark/pull/40421]

> Allow V2 writes to indicate advisory partition size
> ---------------------------------------------------
>
>                 Key: SPARK-42779
>                 URL: https://issues.apache.org/jira/browse/SPARK-42779
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 3.5.0
>            Reporter: Anton Okolnychyi
>            Assignee: Anton Okolnychyi
>            Priority: Major
>             Fix For: 3.5.0
>
>
> Data sources may request a particular distribution and ordering of data for V2 writes. If AQE is enabled, the default session advisory partition size (64MB) will be used as guidance. Unfortunately, this default value can still lead to small files because the written data can be compressed nicely using columnar file formats. Spark should allow data sources to indicate the advisory shuffle partition size, just like it lets data sources request a particular number of partitions.



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