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Design and performance analysis of a disk array system

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4 Author(s)
Catania, V. ; Istituto di Inf. e Telecommun., Catania Univ., Italy ; Puliafito, A. ; Riccobene, S. ; Vita, L.

We concentrate on the architectural issues of parallelizing I/O access in a disk array system by means of definition of a new, particularly flexible architecture, called partial dynamic declustering, which is fault-tolerant and offers higher levels of performance and reliability than the solutions normally used. A simulation analysis highlights the efficiency of the proposed solution in balancing the file system workload and demonstrates its validity in both cases of unbalanced loads and expansion of the system. Particular attention is also paid to the definition of analytical models, based on stochastic reward nets, in order to analyze the performance and reliability of the system. The response time distribution function is evaluated and a specific performance analysis with varying degrees of declustering and workload is carried out

Published in:

Computers, IEEE Transactions on  (Volume:44 ,  Issue: 10 )

Date of Publication:

Oct 1995

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