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