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Posted to issues@kylin.apache.org by "Shaofeng SHI (JIRA)" <ji...@apache.org> on 2018/07/23 05:48:00 UTC

[jira] [Created] (KYLIN-3462) "dfs.replication=2" and compression not work in Spark cube engine

Shaofeng SHI created KYLIN-3462:
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             Summary: "dfs.replication=2" and compression not work in Spark cube engine
                 Key: KYLIN-3462
                 URL: https://issues.apache.org/jira/browse/KYLIN-3462
             Project: Kylin
          Issue Type: Bug
          Components: Spark Engine
    Affects Versions: v2.4.0, v2.3.1, v2.3.0
            Reporter: Shaofeng SHI


In a comparison between Spark and MR cubing, I noticed the cuboid files that Spark engine generated is 3x lager than MR, and took 4x larger more disk on HDFS than MR.

 

The reason is, the "dfs.replication=2" didn't work when Spark save to HDFS. And by default no compression.   



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