Parallel File System

From the user's perspective, PFS file systems closely resemble UNIX file systems. PFS uses a conventional inverted-tree hierarchy, with a root directory at the top and subdirectories and files branching down from there. The fact that individual PFS files are distributed across multiple disks managed by multiple I/O servers is transparent to the programmer. The way that PFS files are actually mapped to the physical storage facilities is based on file system configuration entries in the CRE database.