Pil Seong Park, University of Suwon, Korea

Persona-sized HPC clusters are widely used in many small labs, because they are cost-effective and easy to build. Instead of adding costly new nodes to old clusters, we may try to make use of some servers’ idle times by including them working independently on the same LAN, especially during the night. However such extension across a firewall raises not only some security problem with NFS but also a load balancing problem caused by heterogeneity. In this paper, we propose a method to solve such problems using only old techniques applicable to old systems as is, without requiring any upgrade for hardware or software. Some experimental results dealing with heterogeneity and load balancing are presented using a two-queue overflow queuing network problem.

HPC clusters, Security, NFS, SSH tunnelling, load balancing