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Posted to issues@spark.apache.org by "Maxim Gekk (JIRA)" <ji...@apache.org> on 2018/11/15 21:05:00 UTC

[jira] [Created] (SPARK-26081) Do not write empty files by text datasources

Maxim Gekk created SPARK-26081:
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             Summary: Do not write empty files by text datasources
                 Key: SPARK-26081
                 URL: https://issues.apache.org/jira/browse/SPARK-26081
             Project: Spark
          Issue Type: Improvement
          Components: SQL
    Affects Versions: 2.4.0
            Reporter: Maxim Gekk


Text based datasources like CSV, JSON and Text produces empty files for empty partitions. This introduces additional overhead while opening and reading such files back. In current implementation of OutputWriter, the output stream are created eagerly even no records are written to the stream. So, creation can be postponed up to the first write.



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