Amazon provides SWF endpoints in multiple regions. These endpoints are provided to reduce latency while accessing the service and storing or retrieving the data from AWS. SWF endpoints are independent of each other. 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 each other. 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 following table. For more details refer to http://docs.aws.amazon.com/general/latest/gr/rande.html#swf_region:
