ObjectGlobe: Ubiquitous query processing on the Internet |
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Authors: | R Braumandl M Keidl A Kemper D Kossmann A Kreutz S Seltzsam K Stocker |
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Affiliation: | Universit?t Passau, Lehrstuhl für Informatik, 94030 Passau, Germany; E-mail: @db.fmi.uni-passau.de, DE Technische Universit?t München, Institut für Informatik, 81667 München, Germany; E-mail: kossmann@in.tum.de, DE
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Abstract: | We present the design of ObjectGlobe, a distributed and open query processor for Internet data sources. Today, data is published
on the Internet via Web servers which have, if at all, very localized query processing capabilities. The goal of the ObjectGlobe
project is to establish an open marketplace in which data and query processing capabilities can be distributed and used by any kind of Internet application. Furthermore, ObjectGlobe integrates cycle providers (i.e., machines) which carry out query processing operators. The overall picture is to make it possible to execute a query
with – in principle – unrelated query operators, cycle providers, and data sources. Such an infrastructure can serve as enabling
technology for scalable e-commerce applications, e.g., B2B and B2C market places, to be able to integrate data and data processing
operations of a large number of participants. One of the main challenges in the design of such an open system is to ensure
privacy and security. We discuss the ObjectGlobe security requirements, show how basic components such as the optimizer and
runtime system need to be extended, and present the results of performance experiments that assess the additional cost for
secure distributed query processing. Another challenge is quality of service management so that users can constrain the costs
and running times of their queries.
Received: 30 October 2000 / Accepted: 14 March 2001 Published online: 7 June 2001 |
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Keywords: | : Distributed query processing – Query optimization – Open systems – Cycle- function- and data provider – Security – Privacy – Quality of service |
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