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https://issues.apache.org/jira/browse/SPARK-39743?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17655799#comment-17655799
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zzzzming95 commented on SPARK-39743:
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[~euigeun_chung]
Currently, Spark uses `airCompressor` lib to support ORC writes, and does not
support setting ZSTD levels~
https://github.com/airlift/aircompressor/blob/79265477482a4594efcc87aaef92b589c6ec2277/src/main/java/io/airlift/compress/zstd/ZstdCompressor.java#L113
> Unable to set zstd compression level while writing parquet files
> ----------------------------------------------------------------
>
> Key: SPARK-39743
> URL: https://issues.apache.org/jira/browse/SPARK-39743
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 3.2.0
> Reporter: Yeachan Park
> Assignee: zzzzming95
> Priority: Minor
> Fix For: 3.4.0
>
>
> While writing zstd compressed parquet files, the following setting
> `spark.io.compression.zstd.level` does not have any affect with regards to
> the compression level of zstd.
> All files seem to be written with the default zstd compression level, and the
> config option seems to be ignored.
> Using the zstd cli tool, we confirmed that setting a higher compression level
> for the same file tested in spark resulted in a smaller file.
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