Webnfs Client Specification

By Callaghan, B.

Book Id: WPLBN0000693366
Format Type: PDF eBook:
File Size: 0.1 MB
Reproduction Date: 2005

Title:	Webnfs Client Specification
Author:	Callaghan, B.
Volume:
Language:	English
Subject:	Sociolinguistics, Fine Arts, Language
Collections:	Technical eBooks and Manuals Collection, Technical eBooks Collection
Historic Publication Date:
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Citation APA MLA Chicago Callaghan, B. B. (n.d.). Webnfs Client Specification. Retrieved from http://gutenberg.cc/

Description
Technical Reference Publication

Excerpt
Introduction: The NFS protocol provides access to shared filesystems across networks. It is designed to be machine, operating system, network architecture, and transport protocol independent. The protocol currently exists in two versions: version 2 [RFC1094] and version 3 [RFC1813], both built on Sun RPC [RFC1831] at its associated eXternal Data Representation (XDR) [RFC1832] and Binding Protocol [RFC1833]. WebNFS provides additional semantics that can be applied to NFS version 2 and 3 to eliminate the overhead of PORTMAP and MOUNT protocols, make the protocol easier to use where firewall transit is required, and reduce the number of LOOKUP requests required to identify a particular file on the server. WebNFS server requirements are described in RFC 2055.

Table of Contents
Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . 2 2. TCP vs UDP . . . . . . . . . . . . . . . . . . . . . . . . 2 3. Well-known Port . . . . . . . . . . . . . . . . . . . . . 2 4. NFS Version 3 . . . . . . . . . . . . . . . . . . . . . . 3 4.1 Transfer Size . . . . . . . . . . . . . . . . . . . . . 3 4.2 Fast Writes . . . . . . . . . . . . . . . . . . . . . . 4 4.3 READDIRPLUS . . . . . . . . . . . . . . . . . . . . . . 4 5. Public Filehandle . . . . . . . . . . . . . . . . . . . . 5 5.1 NFS Version 2 Public Filehandle . . . . . . . . . . . . 5 5.2 NFS Version 3 Public Filehandle . . . . . . . . . . . . 5 6. Multi-component Lookup . . . . . . . . . . . . . . . . . . 6 6.1 Canonical Path vs. Native Path . . . . . . . . . . . . . 6 6.2 Symbolic Links . . . . . . . . . . . . . . . . . . . . . 7 6.2.1 Absolute Link . . . . . . . . . . . . . . . . . . . . 8 6.2.2 Relative Link . . . . . . . . . . . . . . . . . . . . 8 6.3 Filesystem Spanning Pathnames . . . . . . . . . . . . . 9 7. Contacting the Server . . . . . . . . . . . . . . . . . . 9 8. Mount Protocol . . . . . . . . . . . . . . . . . . . . . . 11 9. Exploiting Concurrency . . . . . . . . . . . . . . . . . . 12 9.1 Read-ahead . . . . . . . . . . . . . . . . . . . . . . . 12 9.2 Concurrent File Download . . . . . . . . . . . . . . . . 13 10. Timeout and Retransmission . . . . . . . . . . . . . . . . 13 11. Bibliography . . . . . . . . . . . . . . . . . . . . . . . 15