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Next: 4.10.2 Fan-Out in User-Level Up: 4.10.1 Types of User-Level Previous: In-Core NFS File Persistent NFS File Systems

Persistent file systems are more complicated than in-core file systems. However, it is much easier to produce user-level code for persistent file systems. There is no longer a need for an auxiliary ``state storing file system.'' Outside the kernel one may use any system call (like read() and write()), so state for example can be stored in any file on a local UFS disk.

Erez Zadok