Amazon provides SWF endpoints in multiple regions. These endpoints are provided to reduce latency while accessing the service and storing or retrieving data from AWS. SWF endpoints are independent of one another. Your SWF domains, workflows, and activities registered in a region are isolated from the other regions and they do not share data or attributes with one another. For example, you can register a domain named SWF-Mydomain-1 in multiple regions. Even though the domain name remains the same, they are distinct domains specific to respective regions. A domain registered in us-east-1 cannot share any data or attributes with a domain registered in us-west-1.
SWF endpoints available in different AWS regions are shown in the table found at http://docs.aws.amazon.com/general/latest/gr/rande.html#swf_ region.
