Emerging Opportunities for the Execution of Workflows across Organizational Boundaries

Abstract:
While the execution of workflows in virtual organizations has been addressed by Grid technologies for several years, the specific support of human interactions has been solved less convincingly so far. The dynamic composition of potentially human driven services across organizational boundaries remains a challenge which will become even more in focus due to the increasing use of cloud computing based services. Here, cloud service providers introduce an additional resource owner role to the service composition domain.

This talk is two folded: In the first part we introduce the web service human task standard (WS-HT) and present an incorporation of this standard into existing grid workflow infrastructures. With the
support of human interaction in grid workflows, we will motivate the demand for our provenance service that traces the evolution of a concrete workflow.

In the second part we will shift our focus to the cloud computing domain. Here we will discuss the impact of cloud computing to the execution of workflows. In particular the talk will explore the dynamic composition of services across clouds with consideration of security aspects.