Workload Characterization of Input/Output Intensive Parallel Applications
چکیده
The broadening disparity in the performance of input/output (I/O) devices and the performance of processors and communication links on parallel systems is a major obstacle to achieving high performance for a wide range of parallel applications. I/O hardware and le system parallelism are the keys to bridging this performance gap. A prerequisite to the development of eecient parallel le systems is detailed characterization of the I/O demands of parallel applications. In this paper , we present a comparative study of the I/O access patterns commonly found in I/O intensive parallel applications. Using the Pablo performance analysis environment and its I/O extensions we captured application I/O access patterns and analyzed their interactions with current parallel I/O systems. This analysis has proven instrumental in guiding the development of new application programming interfaces (APIs) for parallel le systems and in developing eeective le system policies that can adap-tively respond to complex application I/O requirements.