Encyclopedia of Database Systems

2018 Edition
| Editors: Ling Liu, M. Tamer Özsu

SAN File System

  • Kazuo Goda
Reference work entry
DOI: https://doi.org/10.1007/978-1-4614-8265-9_1473

Synonyms

Shared-disk file system

Definition

The term SAN file system refers to a file system which transfers file data directly to/from a storage device through a SAN. A SAN file system often has the capability of coherency control such that multiple servers may share the file system volume and simultaneously access files stored in the volume. The term shared disk file system is also used to refer to a SAN file system.

Key Points

In contrast to local file systems, SAN file systems allow multiple servers to share file system volumes directly and to access the same file simultaneously. To achieve this, the SAN file system has the capability of coherency control between servers. File system software running on each server may cache file data in a main memory buffer. Suppose that two servers, A and B, have cached the same file X. If A and B were to update X independently at the same time, two versions of X might be generated. The SAN file system needs to let each server be aware of the...

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Recommended Reading

  1. 1.
    Barrios M, Jones T, Kinnane S, Landzettel M, Al-Safran S, Stevens J, Stone C, Thomas C, Troppens U. Sizing and tuning GPFS. IBM Redbook. SG24-5610-00, 1999.Google Scholar
  2. 2.
    Burns RC, Rees RM, Long DDE. Semi-preemptible locks for a distributed file system. In: Proceedings of the 19th IEEE International Performance, Computing and Communications Conference; 2000. p. 397–404.Google Scholar
  3. 3.
    Soltis SR, Ruwart TM, O’Keefe MT. The global file system. In: Proceedings of the 15th NASA Goddard Conference on Mass Storage Systems; 1996. p. 319–42.Google Scholar

Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.The University of TokyoTokyoJapan

Section editors and affiliations

  • Masaru Kitsuregawa
    • 1
  1. 1.Inst. of Industrial ScienceUniv. of TokyoTokyoJapan