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In this paper, we describe a “gateway as a service” approach to help researchers bring their applications online quickly and make them available for the broad user community. This approach builds on the HUBzero technology and leverages the XSEDE HPC resources. It enables individual scientists and small research groups to quickly develop, deploy, and share their applications online without having to learn web programming and the XSEDE system level software stacks. The cost of such approach for a small team would be significantly lower than building a science gateway from scratch and sustaining it in the long run. The applicability of this approach was demonstrated via an XSEDE Extended Collaborative Support Service (ECSS) project we have recently completed for developing a biomechanical imaging (BMI) gateway. Our team consists of ECSS staff from Purdue University and biomechanical imaging researchers from Boston University and Rensselaer Polytechnic Institute. In the ECSS work, we were able to quickly develop an online tool for composing and executing NLACE model simulations on Gordon and visualizing the model output interactively using ParaView. The online tool runs on DiaGrid Hub (powered by HUBzero) with comprehensive support for job and workflow submission, tickets, content management, discussion forum, wiki, project, group, documentation, rating, citation, and usage tracking.
