摘要: The Vesta parallel file system is designed to provide access application programs running on multicomputers with I/O subsystems. uses a new abstraction of files: not sequence bytes, but rather it can be partitioned into multiple disjoint sequences that are accessed in parallel. partitioning—which also changed dynamically—reduces the need for synchronization and coordination during access. Some control over layout data provided, so matched anticipated patterns. fully implemented forms basis AIX Parallel File System IBM SP2. implementation does compromise scalability or parallelism. In fact, all accesses done directly node contains requested data, without any indirection shared metadata. Disk mapping caching functions confined each node, there no keep coherent across nodes. Performance measurements shown good increased resources. Moreover, different patterns show achieve similar performance.
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