How do I run Spark jobs concurrently in the same AWS EMR cluster ?

Question

Is it possible to submit and run Spark jobs concurrently in the same AWS EMR cluster ? If yes then could you please elaborate ?

Answer 1

You should use the tag --deploy-mode cluster that will allow you to deploy multiple executions to your cluster. That will make yarn handle the resources and the queues for you.

The full example:

spark-submit \
  --class org.apache.spark.examples.SparkPi \
  --master yarn \
  --deploy-mode cluster \  # can be client for client mode
  --executor-memory 20G \
  --num-executors 50 \
  /path/to/examples.jar \
  1000

More details here.

Answer 2

Currently, EMR doesn't support running multiple steps in parallel. As far as I know such experimental feature is already implemented but not released due to some issues.