The Galley Parallel File System
[nieuwejaar:galley]Nils Nieuwejaar and David Kotz. The Galley Parallel File System. Proceedings of the ACM International Conference on Supercomputing (ICS), pages 374–381. ACM, Philadelphia, May 1996. doi:10.1145/237578.237639. ©Copyright ACM. Later revised as nieuwejaar:jgalley-tr.
As the I/O needs of parallel scientific applications increase, file systems for multiprocessors are being designed to provide applications with parallel access to multiple disks. Many parallel file systems present applications with a conventional Unix-like interface that allows the application to access multiple disks transparently. This interface conceals the parallelism within the file system, which increases the ease of programmability, but makes it difficult or impossible for sophisticated programmers and libraries to use knowledge about their I/O needs to exploit that parallelism. Furthermore, most current parallel file systems are optimized for a different workload than they are being asked to support. We introduce Galley, a new parallel file system that is intended to efficiently support realistic parallel workloads. We discuss Galley’s file structure and application interface, as well as an application that has been implemented using that interface.
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