CMS@home: Integrating the Volunteer Cloud and High‑Throughput Computing

Volunteercomputing has the potential to provide significant additional computing capacity for the LHC experiments. Initiatives such as the CMS@home project are aiming to integrate volunteercomputing resources into the experiment’s computational frameworks to support their scientific workloads. This is especially important, as over the next few years the demands on computing capacity will increase beyond what can be supported by general technology trends. This paper describes how a volunteercomputing project that uses virtualization to run high energy physics simulations can integrate those resources into their computing infrastructure. The concept of the volunteercloud is introduced and how this model can simplify the integration is described. An architecture for implementing the volunteercloud model is presented along with an implementation for the CMS@home project. Finally, the submission of real CMS workloadsto this volunteercloud are compared to identical workloadssubmitted to the grid.