WASHINGTON--(BUSINESS WIRE)--Virtustream, the enterprise-class cloud software and services provider, today announced it has been selected by KoçSistem, Turkey’s largest cloud provider and information technology consultancy, to provide enterprise class cloud technologies for cloud services to Turkey’s growing cloud computing market. KoçSistem will integrate Virtustream’s xStream™ cloud management software across its software integration, business application and data center/cloud services units,