ACM SIGMOD Anthology ACM SIGMOD dblp.uni-trier.de

The Distributed Information Search Component (Disco) and the World Wide Web.

Anthony Tomasic, Rémy Amouroux, Philippe Bonnet, Olga Kapitskaia, Hubert Naacke, Louiqa Raschid: The Distributed Information Search Component (Disco) and the World Wide Web. SIGMOD Conference 1997: 546-548
@inproceedings{DBLP:conf/sigmod/TomasicABKNR97,
  author    = {Anthony Tomasic and
               R{\'e}my Amouroux and
               Philippe Bonnet and
               Olga Kapitskaia and
               Hubert Naacke and
               Louiqa Raschid},
  editor    = {Joan Peckham},
  title     = {The Distributed Information Search Component (Disco) and the
               World Wide Web},
  booktitle = {SIGMOD 1997, Proceedings ACM SIGMOD International Conference
               on Management of Data, May 13-15, 1997, Tucson, Arizona, USA},
  publisher = {ACM Press},
  year      = {1997},
  pages     = {546-548},
  ee        = {http://doi.acm.org/10.1145/253260.253402, db/conf/sigmod/TomasicABKNR97.html},
  crossref  = {DBLP:conf/sigmod/97},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}
BibTeX

Abstract

The Distributed Information Search COmponent (DISCO) is a prototype heterogeneous distributed database that accesses underlying data sources. The DISCO prototype currently focuses on three central research problems in the context of these systems. First, since the capabilities of each data source is different, transforming queries into subqueries on data source is difficult. We call this problem the weak data source problem. Second, since each data source performs operations in a generally unique way, the cost for performing an operation may vary radically from one wrapper to another. We call this problem the radical cost problem. Finally, existing systems behave rudely when attempting to access an unavailable data source. We call this problem the ungraceful failure problem.

DISCO copes with these problems. For the weak data source problem, the database implementor defines precisely the capabilities of each data source. For the radical cost problem, the database implementor (optionally) defines cost information for some of the operations of a data source. The mediator uses this cost information to improve its cost model. To deal with ungraceful failures, queries return partial answers. A partial answer contains the part of the final answer to the query that was produced by the available data sources. The current working prototype of DISCO contains implementations of these solutions and operations over a collection of wrappers that access information both in files and on the World Wide Web.

Copyright © 1997 by the ACM, Inc., used by permission. Permission to make digital or hard copies is granted provided that copies are not made or distributed for profit or direct commercial advantage, and that copies show this notice on the first page or initial screen of a display along with the full citation.


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Joan Peckham (Ed.): SIGMOD 1997, Proceedings ACM SIGMOD International Conference on Management of Data, May 13-15, 1997, Tucson, Arizona, USA. ACM Press 1997 BibTeX , SIGMOD Record 26(2), June 1997
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References

[1]
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[2]
Anthony Tomasic, Louiqa Raschid, Patrick Valduriez: Scaling Heterogeneous Databases and the Design of Disco. ICDCS 1996: 449-457 BibTeX
[3]
Gio Wiederhold: Intelligent Integration of Information. SIGMOD Conference 1993: 434-437 BibTeX
[4]
Asuman Dogac, Ugur Halici, Ebru Kilic, Gökhan Özhan, Fatma Ozcan, Sena Nural, Cevdet Dengi, Sema Mancuhan, Ismailcem Budak Arpinar, Pinar Koksal, Cem Evrendilek: METU Interoperable Database System. SIGMOD Conference 1996: 552 BibTeX
[5]
Mary Tork Roth, Manish Arya, Laura M. Haas, Michael J. Carey, William F. Cody, Ronald Fagin, Peter M. Schwarz, Joachim Thomas II, Edward L. Wimmers: The Garlic Project. SIGMOD Conference 1996: 557 BibTeX
[6]
Dallan Quass, Jennifer Widom, Roy Goldman, Kevin Haas, Qingshan Luo, Jason McHugh, Svetlozar Nestorov, Anand Rajaraman, Hugo Rivero, Serge Abiteboul, Jeffrey D. Ullman, Janet L. Wiener: LORE: A Lightweight Object REpository for Semistructured Data. SIGMOD Conference 1996: 549 BibTeX
[7]
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[8]
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[9]
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[10]
Laurent Amsaleg, Michael J. Franklin, Anthony Tomasic, Tolga Urhan: Scrambling Query Plans to Cope With Unexpected Delays. PDIS 1996: 208-219 BibTeX
[11]
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Referenced by

  1. Uwe Röhm, Klemens Böhm: Working Together in Harmony - An Implementation of the CORBA Object Query Service and Its Evaluation. ICDE 1999: 238-247
  2. Oliver Haase, Andreas Henrich: A Closed Approach to Vague Collections in Partly Inaccessible Distributed Databases. ADBIS 1999: 261-274
  3. Anthony Tomasic, Louiqa Raschid, Patrick Valduriez: Scaling Access to Heterogeneous Data Sources with DISCO. IEEE Trans. Knowl. Data Eng. 10(5): 808-823(1998)
  4. William W. Cohen: Providing Database-like Access to the Web Using Queries Based on Textual Similarity. SIGMOD Conference 1998: 558-560
  5. William W. Cohen: Integration of Heterogeneous Databases Without Common Domains Using Queries Based on Textual Similarity. SIGMOD Conference 1998: 201-212
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