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Sleepers and Workaholics: Caching Strategies in Mobile Environments.

Daniel Barbará, Tomasz Imielinski: Sleepers and Workaholics: Caching Strategies in Mobile Environments. VLDB J. 4(4): 567-602(1995)
@article{DBLP:journals/vldb/BarbaraI95,
  author    = {Daniel Barbar{\'a} and
               Tomasz Imielinski},
  title     = {Sleepers and Workaholics: Caching Strategies in Mobile Environments},
  journal   = {VLDB J.},
  volume    = {4},
  number    = {4},
  year      = {1995},
  pages     = {567-602},
  ee        = {db/journals/vldb/BarbaraI95.html},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}
BibTeX

Abstract

In the mobile wireless computing environment of the future, a large number of users, equipped with low-powered palmtop machines, will query databases over wireless communication channels. Palmtop-based units will often be disconnected for prolonged periods of time, due to power saving measures; palmtops also will frequently relovate between different cells, and will connect to different data servers at different times. Caching of frequently accessed data items will be an important technique that will reduce contention on the narrow-bandwidth, wireless channel. However, cache individualization strategies will be severely affected by the disconnection and mobility of the clients. The server may no longer know which clients are currently residing under its cell, and which of tham are currently on. We propose a taxonomy of different cache invalidation strategies, and study the impact of clients' disconnection times on their performance. We study ways to improve further the efficiency of the invalidation techniques described. We also describe how our techniques can be implemented over different network environments.

Copyright © 1995 by the VLDB Endowment. Permission to copy without fee all or part of this material is granted provided that the copies are not made or distributed for direct commercial advantage, the VLDB copyright notice and the title of the publication and its date appear, and notice is given that copying is by the permission of the Very Large Data Base Endowment. To copy otherwise, or to republish, requires a fee and/or special permission from the Endowment.

Key Words

Wireless, caching, data management, information servers.

Preliminary Version: SIGMOD 1994: 1-12

Online Paper

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Referenced by

  1. Stéphane Grumbach, Leonardo Tininini: On the Content of Materialized Aggregate Views. PODS 2000: 47-57
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