Date Added: Aug 2009
Clusters based on commodity components continue to be very popular for High-Performance Computing (HPC). These clusters must be careful to balance both computational as well as I/O requirements of applications. This I/O requirement is generally fulfilled by a high-speed interconnect such as InfiniBand. The balance of computational and I/O performance is often changing, with the latest change being made by the Intel "Nehalem" architecture that can dramatically increase computing power. In this paper the authors explore how this balance has changed and how different speeds of InfiniBand interconnects including Double Data Rate (DDR) and Quad Data Rate (QDR) InfiniBand HCAs.