If I have a file in HFDS, or on the local filesystem, is it possible to copy this to S3 with EMRFS enabled, immediately shutdown the cluster, and have the file be guaranteed available for both listing and reading to external readers as soon as this copy operation is complete? Or is EMRFS only consistent within the specific EMR cluster it was enabled for? What would copying a file to S3 via EMRFS from HDFS look like? From the local filesystem?