Methodology to evaluate performance of the I/O systems on High Performance Computers
Extracting the performance characteristics of the diﬀerent I/O conﬁgurations of the I/O system. These activities are independent. The characterization of application is done oﬀ-line and the application I/O model can be applied to analyze diﬀerent target systems. The application I/O model is deﬁned by three characteristics: metadata, spatial global pattern and temporal global pattern. The I/O model of the application is expressed by I/O phases, where an I/O phase is a repetitive sequence of same pattern on a ﬁle for a number of processes of the parallel application. A phase will be signiﬁcant depending on data transferred that represent its weight.
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