Dynamic Computing Resource Extension using COBalD/TARDIS

To dynamically increase computing power on demand, Cloud providers, HPC clusters, and free institute resources can be used. In order to make theses so-called opportunistic resources transparently available, the services COBalD and TARDIS are developed in collaboration of the Institute of Experimental Particle Physics (ETP) and the Steinbuch Centre for Computing (SCC) at KIT. The opportunistic resources are integrated into an overlay batch system (OBS), which acts as a singlepoint-of-entry for the users. Depending on the decisions of the OBS, the utilization, and the allocation of the additional compute resources, COBalD/TARDIS adjust the resource allocation at the various resource providers. To supply the necessary software environment for the jobs, required by the scienti c communities, virtualization and containerization technologies are used on those heterogeneous resources.