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Posted to issues@spark.apache.org by "Hyukjin Kwon (JIRA)" <ji...@apache.org> on 2016/06/25 10:05:37 UTC
[jira] [Commented] (SPARK-16188) Spark sql create a lot of small
files
[ https://issues.apache.org/jira/browse/SPARK-16188?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15349581#comment-15349581 ]
Hyukjin Kwon commented on SPARK-16188:
--------------------------------------
Is this a duplicated of SPARK-10216 maybe?
> Spark sql create a lot of small files
> -------------------------------------
>
> Key: SPARK-16188
> URL: https://issues.apache.org/jira/browse/SPARK-16188
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 1.6.0
> Environment: spark 1.6.1
> Reporter: cen yuhai
>
> I find that spark sql will create files as many as partition size. When the results are small, there will be too many small files and most of them are empty.
> Hive have a function to detect the avg of file size. If avg file size is smaller than "hive.merge.smallfiles.avgsize", hive will add a job to merge files.
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