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Posted to dev@kylin.apache.org by "tanyao (Jira)" <ji...@apache.org> on 2021/10/15 02:45:00 UTC
[jira] [Created] (KYLIN-5099) parquet file size is too big in
kylin4 with spark3 than kylin3 with mr
tanyao created KYLIN-5099:
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Summary: parquet file size is too big in kylin4 with spark3 than kylin3 with mr
Key: KYLIN-5099
URL: https://issues.apache.org/jira/browse/KYLIN-5099
Project: Kylin
Issue Type: Bug
Affects Versions: v4.0.0
Reporter: tanyao
Attachments: image-2021-10-15-10-43-54-830.png, image-2021-10-15-10-44-49-178.png
hi ,
i am trying to use spark 3.1.1 as the build engine in kylin4.0, the hive table has 200W+ rows with orc type, and there are 10 dimentions definded, the original size is about 50M.
when i use kylin4.0 to build this cube ,the final parquet files size all together area 1G+，that is to say , a singal segment is about 1G+. However , i use the same hive table data with the same cube model and dimentions , the hbase segment size is just 100M+,
why this happened?
!image-2021-10-15-10-43-54-830.png!
!image-2021-10-15-10-44-49-178.png!
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