Starting a new thread just for dealing with AWS regions better, context S3 and Redshift.
S3FileSystem.amazonS3 build could be refactored to select region based on [1]: 1. the flag value region 2. the EC2 region, if found in environment (running in EC2 VM) 3. the default region (us-east-1) For actually moving data, a Map<String, AmazonS3> could be used to hold an S3 client per region, new S3 clients created as needed. The "master" client can be used to find a bucket's region [2]. I think this is pragmatic, looking for feedback before I write a PR. Also, if someone is already making progress, let me know. Jacob [1] https://docs.aws.amazon.com/sdk-for-java/v1/developer-guide/java-dg-region-selection.html [2] https://docs.aws.amazon.com/AWSJavaSDK/latest/javadoc/com/amazonaws/services/s3/AmazonS3Client.html#getBucketLocation-java.lang.String-
