InfiniBand-over-Distance transport demonstrator using low-latency WDM transponders and IB credit buffering
Klaus Grobe, Christian Illmer and Ulrich Schlege ADVA AG Optical Networking, Germany
They report on an IB-over-Distance demonstrator conducted in the high-performance computing centre of the University of Stuttgart, Germany. This demonstrator comprised an ADVA Optical Networking DWDM link on Standard Single-Mode Fiber (SSMF 9/125), an existing Voltaire IB Grid Director, a Silverstorm IB switch, applications in the participating computing centres and the combination of two new components, a transparent low-latency multi-clock data transponder for the ADVA FSP platform and an IB link extender from Obsidian, which provides IB credit buffering. A total of 4×10Gb/s IB transport capacity (4×IBx4 SDR) was established, and fiber spools were used to provide link lengths between 500m and 100km.