Hi,   I understand that you have a spark java code, Which is taking 2 hours to process 4MB of data and you like to improve the performance of this application.   I recommend you to check the below documents, Which helps in performance tuning both in code and configuration level.   https://blog.cloudera.com/how-to-tune-your-apache-spark-jobs-part-1/ https://blog.cloudera.com/how-to-tune-your-apache-spark-jobs-part-2/   Thanks Jerry ... View more