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Network File System (NFS)

Network File System (NFS). The remote access model. The upload/download model. NFS Architecture (2). The basic NFS architecture for UNIX systems. Communication. Reading data from a file in NFS version 3. Reading data using a compound procedure in version 4. Naming (1).

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Network File System (NFS)

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  1. Network File System (NFS) • The remote access model. • The upload/download model

  2. NFS Architecture (2) • The basic NFS architecture for UNIX systems.

  3. Communication • Reading data from a file in NFS version 3. • Reading data using a compound procedure in version 4.

  4. Naming (1) • Mounting (part of) a remote file system in NFS.

  5. Naming (2) • Mounting nested directories from multiple servers in NFS.

  6. Automounting (1) • A simple automounter for NFS.

  7. Automounting (2) • Using symbolic links with automounting.

  8. Semantics of File Sharing (1) • On a single processor, when a read follows a write, the value returned by the read is the value just written. • In a distributed system with caching, obsolete values may be returned.

  9. Semantics of File Sharing (2) • Four ways of dealing with the shared files in a distributed system.

  10. File Locking in NFS (1) • NFS version 4 operations related to file locking.

  11. File Locking in NFS (2) Requestaccess Currentaccessstate • The result of an open operation with share reservations in NFS. • When the client requests shared access given the current denial state. • When the client requests a denial state given the current file access state.

  12. Client Caching (1) • Client-side caching in NFS.

  13. Client Caching (2) • Using the NFS version 4 callback mechanism to recall file delegation.

  14. RPC Failures • Three situations for handling retransmissions. • The request is still in progress • The reply has just been returned • The reply has been some time ago, but was lost.

  15. Security • The NFS security architecture.

  16. Secure RPCs • Secure RPC in NFS version 4.

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