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pNFS Extension to NFSv4 NFS is THE file system standard Fewest additions that enable parallel I/O from clients Layouts are the key additional abstraction Describe where data is located and how it is organized Clients access storage directly, in parallel Generalized support for asymmetric solutions Files: Clean way to do filer virtualization, eliminate botteneck Objects: Standard way to do object-based file systems Blocks: Standard way to do block-based SAN file systems |