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Posted to dev@parquet.apache.org by "ASF GitHub Bot (Jira)" <ji...@apache.org> on 2020/06/02 00:18:00 UTC

[jira] [Commented] (PARQUET-1866) Replace Hadoop ZSTD with JNI-ZSTD

    [ https://issues.apache.org/jira/browse/PARQUET-1866?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17121421#comment-17121421 ] 

ASF GitHub Bot commented on PARQUET-1866:
-----------------------------------------

dbtsai commented on pull request #793:
URL: https://github.com/apache/parquet-mr/pull/793#issuecomment-637193519


   +1 @shangxinli and thank you for this contribution. 
   
   This will allow users who are on order versions of hadoop that don't support native ZSTD to use ZSTD compression in Parquet, and also, users don't have to go through the very complicated hadoop native installation. For developers, we will be able to easily test this out in different local envs.  
   
   cc @rdblue 


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> Replace Hadoop ZSTD with JNI-ZSTD
> ---------------------------------
>
>                 Key: PARQUET-1866
>                 URL: https://issues.apache.org/jira/browse/PARQUET-1866
>             Project: Parquet
>          Issue Type: Improvement
>          Components: parquet-mr
>    Affects Versions: 1.12.0
>            Reporter: Xinli Shang
>            Assignee: Xinli Shang
>            Priority: Major
>             Fix For: 1.12.0
>
>
> The parquet-mr repo has been using [ZSTD-JNI|https://github.com/luben/zstd-jni/tree/master/src/main/java/com/github/luben/zstd] for the parquet-cli project. It is a cleaner approach to use this JNI than using Hadoop ZSTD compression, because 1) on the developing box, installing Hadoop is cumbersome, 2) Older version of Hadoop doesn't support ZSTD. Upgrading Hadoop is another pain. This Jira is to replace Hadoop ZSTD with ZSTD-JNI for parquet-hadoop project. 
> According to the author of ZSTD-JNI, Flink, Spark, Cassandra all use ZSTD-JNI for ZSTD.
> Another approach is to use https://github.com/airlift/aircompressor which is a pure Java implementation. But it seems the compression level is not adjustable in aircompressor. 



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