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Encyclopedia of Database Systems pp 2489–2490Cite as

Network Attached Secure Device

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Synonyms

NASD; Object-based storage device; OSD

Definition

A Network Attached Secure Device (often abbreviated to NASD) is a networked storage device which offers object-level storage accesses. NASD was first explored in a research project of the same name, which started at Carnegie Mellon University in 1995. NASD is now more often called Object based Storage Device (shortened to OSD).

Key Points

NASD is an approach of decoupling only low-level functions of file systems from NAS devices. A NASD manages only stored objects, each of which is identified with a unique file descriptor, and their additional information such as metadata and attributes, whereas a central policy server manages higher-level information which is used for name space management and authorization. A bunch of NASDs, with the assistance of the central policy server, can together work as a file store. This may look similar to NAS at a glance, but the difference is that most commands and data are directly transferred...

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Recommended Reading

  1. ANSI. Information Technology – SCSI Object-Based Storage Device Commands (OSD). Standard ANSI/INCITS 400-2004. 2004.

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  2. Gibson GA, Van Meter R. Network attached storage architecture. Commun ACM. 2000;43(11):37–45.

    Article  Google Scholar 

  3. Gibson GA, Nagle DF, Amiri K, Chang FW, Feinberg EM, Gobioff H, Lee C, Ozceri B, Riedel E, Rochberg D, Zelenka J. File server scaling with network-attached secure disks. In: Proceedings of the 1997 ACM SIGMETRICS International Conference on Measurement and Modeling of Computer Systems; 1997. p. 272–84.

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Author information

Authors and Affiliations

  1. The University of Tokyo, Tokyo, Japan

    Kazuo Goda

Authors
  1. Kazuo Goda
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Corresponding author

Correspondence to Kazuo Goda .

Editor information

Editors and Affiliations

  1. Georgia Institute of Technology College of Computing, Atlanta, GA, USA

    Ling Liu

  2. University of Waterloo School of Computer Science, Waterloo, ON, Canada

    M. Tamer Özsu

Section Editor information

  1. Inst. of Industrial Science, Univ. of Tokyo, Tokyo, Meguro Ku, Japan

    Masaru Kitsuregawa

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

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Cite this entry

Goda, K. (2018). Network Attached Secure Device. In: Liu, L., Özsu, M.T. (eds) Encyclopedia of Database Systems. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-8265-9_1466

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