Hi I have a spark job which creates around 500 part files inside each directory I process. So I have thousands of such directories. So I need to merge these small small 500 part files. I am using spark.sql.shuffle.partition as 500 and my final small files are ORC files. Is there a way to merge orc files in Spark if not please suggest the best way to merge files created by Spark job in hdfs please guide. Thanks much.
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