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Scalable I/O forwarding framework for high-performance computing systems

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9 Author(s)
Ali, N. ; Ohio State Univ., Columbus, OH, USA ; Carns, P. ; Iskra, K. ; Kimpe, D.
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Current leadership-class machines suffer from a significant imbalance between their computational power and their I/O bandwidth. While Moore's law ensures that the computational power of high-performance computing systems increases with every generation, the same is not true for their I/O subsystems. The scalability challenges faced by existing parallel file systems with respect to the increasing number of clients, coupled with the minimalistic compute node kernels running on these machines, call for a new I/O paradigm to meet the requirements of data-intensive scientific applications. I/O forwarding is a technique that attempts to bridge the increasing performance and scalability gap between the compute and I/O components of leadership-class machines by shipping I/O calls from compute nodes to dedicated I/O nodes. The I/O nodes perform operations on behalf of the compute nodes and can reduce file system traffic by aggregating, rescheduling, and caching I/O requests. This paper presents an open, scalable I/O forwarding framework for high-performance computing systems. We describe an I/O protocol and API for shipping function calls from compute nodes to I/O nodes, and we present a quantitative analysis of the overhead associated with I/O forwarding.

Published in:

Cluster Computing and Workshops, 2009. CLUSTER '09. IEEE International Conference on

Date of Conference:

Aug. 31 2009-Sept. 4 2009

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