Zouxxyy opened a new pull request, #7372:
URL: https://github.com/apache/hudi/pull/7372

   ### Change Logs
   
   fix https://issues.apache.org/jira/browse/HUDI-5326
   
   1. Modify the file division strategy in SparkSizeBasedClusteringPlanStrategy
   (1) Sort fileSlices before dividing, which makes dividing more compact
   (2) Avoid output clustering group size exceeding 
`hoodie.clustering.plan.strategy.max.bytes.per.group`
   
   2. Set the maximum size of the file written by clustering to 
`hoodie.clustering.plan.strategy.max.bytes.per.group` to avoid the generation 
of small files
   E.g: Under the new strategy, if we set we set max.bytes.per.group=20, 
target.file.max.bytes=10, the size of files by clustering will fluctuate around 
10, use `target.file.max.bytes` as the threshold will split many small files 
when size > 10.
   
   ### Impact
   
   refer to above
   
   ### Risk level (write none, low medium or high below)
   
   low
   
   ### Documentation Update
   
   None
   
   ### Contributor's checklist
   
   - [ ] Read through [contributor's 
guide](https://hudi.apache.org/contribute/how-to-contribute)
   - [ ] Change Logs and Impact were stated clearly
   - [ ] Adequate tests were added if applicable
   - [ ] CI passed
   


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