Integrating Cactus Simulations within Triana Workflows

In this paper, we give a status report for an architecture that can be used to view or analyse the output of scientific applications within secure distributed environments. The model satisfies essential criteria for such an environment, such as traversing firewall issues, by constructing a one-way protocol for communication to clients wishing to view the progress of such an application. Our prototype uses the Cactus thorn architecture to implement the protocol, but we have already developed a stand alone version for use with legacy applications. The protocol uses Web service standards for implementation and deploys these within a dynamic environment enabling spontaneous run-time connectivity with the legacy codes running on the distributed resource. We demonstrate this capability in this paper by showing how Triana can be used to view the output of a Cactus simulation of a 3D scalar field produced by two orbiting sources.