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Issue No.03 - May/June (2011 vol.8)
pp: 404-418
KK Rao , IBM Almaden Research Center, San Jose, CA
James Lee Hafner , IBM Almaden Research Center, San Jose, CA
Richard A. Golding , IBM Almaden Research Center, San Jose, CA
High-end enterprise storage has traditionally consisted of monolithic systems with customized hardware, multiple redundant components and paths, and no single point of failure. Distributed storage systems realized through networked storage nodes offer several advantages over monolithic systems such as lower cost and increased scalability. In order to achieve reliability goals associated with enterprise-class storage systems, redundancy will have to be distributed across the collection of nodes to tolerate both node and drive failures. In this paper, we present alternatives for distributing this redundancy, and models to determine the reliability of such systems. We specify a reliability target and determine the configurations that meet this target. Further, we perform sensitivity analyses, where selected parameters are varied to observe their effect on reliability.
Mass storage, fault tolerance, modeling techniques, redundant design, distributed systems.
KK Rao, James Lee Hafner, Richard A. Golding, "Reliability for Networked Storage Nodes", IEEE Transactions on Dependable and Secure Computing, vol.8, no. 3, pp. 404-418, May/June 2011, doi:10.1109/TDSC.2010.21
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