[jira] [Closed] (HUDI-5326) Incorrect cluster grouping in SparkSizeBasedClusteringPlanStrategy

["Ethan Guo (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HUDI-5326?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ethan Guo closed HUDI-5326.
---------------------------
    Resolution: Fixed

> Incorrect cluster grouping  in SparkSizeBasedClusteringPlanStrategy
> -------------------------------------------------------------------
>
>                 Key: HUDI-5326
>                 URL: https://issues.apache.org/jira/browse/HUDI-5326
>             Project: Apache Hudi
>          Issue Type: Bug
>          Components: clustering
>            Reporter: zouxxyy
>            Assignee: zouxxyy
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 0.13.0
>
>
> Currently, the size of the clusting group building in `SparkSizeBasedClusteringPlanStrategy` will be greater than `hoodie.clustering.plan.strategy.max.bytes.per.group`, which will cause the merged file size to be inconsistent with`hoodie.clustering.plan.strategy.target.file.max.bytes`
> E.g:
> we set max.bytes.per.group=20, target.file.max.bytes=10
> if we have small files, which sizes are 4, 4, 4, 4, 3, 3, 3
> 4, 4, 4, 4, 3, 3 will be divided into one clusting groups, they will be merged into 22/10 = 3 files, which is inconsistent with `max.bytes.per.group`/`target.file.max.bytes`=2
> and their average size will be 7, which has a big gap with 10.



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