Running EMR Spark With Multiple S3 Accounts

Question

I have an EMR Spark Job that needs to read data from S3 on one account and write to another.
I split my job into two steps.

1. read data from the S3 (no

Answer 1

I believe you need to assign an IAM role to your compute nodes (you probably already have done this), then grant cross-account access to that role via IAM on the "Remote" account. See http://docs.aws.amazon.com/IAM/latest/UserGuide/tutorial_cross-account-with-roles.html for the details.