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https://issues.apache.org/jira/browse/SPARK-25895?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sean Owen resolved SPARK-25895.
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Resolution: Won't Fix
> No test to compare Zstd and Lz4 Compression Algorithm
> -----------------------------------------------------
>
> Key: SPARK-25895
> URL: https://issues.apache.org/jira/browse/SPARK-25895
> Project: Spark
> Issue Type: Test
> Components: Spark Core
> Affects Versions: 2.3.1
> Reporter: Udbhav Agrawal
> Priority: Minor
>
> As per Jira SPARK-19112 Zstd Compression ratio is better than the default
> compression Codec i.e lz4, this test compares the shuffle spill, shuffle read
> and shuffle write values when both the compression codec is used and there
> was no UT to verify the same.
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