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Models of parallel applications with large computation and I/O requirements

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4 Author(s)
Rosti, E. ; Dipt. di Sci. dell''Informazione, Milan Univ., Italy ; Serazzi, G. ; Smirni, E. ; Squillante, M.S.

A fundamental understanding of the interplay between computation and I/O activities in parallel applications that manipulate huge amounts of data is critical to achieving good application performance, as well as correctly characterizing the workloads of large-scale high-performance parallel systems. We present a formal model of the behavior of CPU and I/O interactions in scientific applications, from which we derive various formulas that characterize application performance. Our model captures the I/O and CPU activity at different levels of granularity, where results from the model are shown to be in excellent agreement with measurement data from a set of I/O-intensive applications. Using the formulas from our model, which explicitly take I/O activity into account, we also present examples of possible applications of the model

Published in:

Software Engineering, IEEE Transactions on  (Volume:28 ,  Issue: 3 )