With the April 11, 2015 update to DataDirect Cloud. The On-Premise Connector functionality has been enhanced to allow the load to on-premise data source to be balanced across multiple On-Premise Connectors. The attached document is a preview of a How To document for configuring Load Balancing that we are working on adding to our document set. Give this exciting new feature a try. We would love to have your feed back on both the functionality and the document.
Load balancing is the recommended way for distributing connector load across multiple machines.