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Overview:

High performance interconnects such as InfiniBand (IB) has enabled large scale deployments of High Performance Computing (HPC) systems. High performance communication and IO middleware such as MPI and NFS over RDMA have also been redesigned to leverage the performance of these modern interconnects. This paper studies and analyzes the performance characteristics of three HPC middleware: IPoIB (IP traffic over IB), MPI and NFS over RDMA. The paper utilizes the Obsidian IB WAN routers for inter-cluster connectivity. The results show that many of the applications absorb smaller network delays fairly well. However, most approaches get severely impacted in high delay scenarios. Further, communication protocols need to be optimized in higher delay scenarios to improve the performance.

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Format:PDFSize:151 KB
Date:Dec 2007
Pages:12

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