Try coalesce function to limit no of part files
On Mon, Jul 6, 2015 at 1:23 PM kachau <umesh.ka...@gmail.com> wrote:
> Hi I am having couple of Spark jobs which processes thousands of files
> every
> day. File size may very from MBs to GBs. After finishing job I usually save
> using the following code
>
> finalJavaRDD.saveAsParquetFile("/path/in/hdfs"); OR
> dataFrame.write.format("orc").save("/path/in/hdfs") //storing as ORC file
> as
> of Spark 1.4
>
> Spark job creates plenty of small part files in final output directory. As
> far as I understand Spark creates part file for each partition/task please
> correct me if I am wrong. How do we control amount of part files Spark
> creates? Finally I would like to create Hive table using these parquet/orc
> directory and I heard Hive is slow when we have large no of small files.
> Please guide I am new to Spark. Thanks in advance.
>
>
>
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