NDLI: Scalable distributed query and update service implementations for XML document elements

Content Provider	IEEE Xplore Digital Library
Author	Grabs, T. Bohm, K. Schek, H.-J.
Copyright Year	2001
Description	Author affiliation: Swiss Federal Inst. of Technol., Zurich, Switzerland (Grabs, T.)
Abstract	Materialization and indexing of XML views is an important issue, and a number of 'XML-to-RDBMS' mappings have been proposed. To build a scalable system for XML document storage where those views are up-to-date, our approach is to provide efficient implementations of basic services for query processing and updates. As a first contribution we define such services, and show that they support many 'XML-to-RDBMS' mappings. As a second contribution, we describe implementations of such services in a database cluster. We evaluate two implementations, one based on a two-level logging and isolation mechanism and one using Windows 2000 COM+ transactions. The main results are as follows: the first approach scales linearly for updates, and query response times are interactive. For example, with high workloads of 100 concurrent clients and 8 cluster components, query response times are 3 seconds on average. The alternative approach is weaker both regarding query response times (10 seconds on average for the above scenario) and scalability.
Sponsorship	IEEE Comput. Soc. Tech. Committee on Data Eng
Starting Page	35
Ending Page	42
File Size	781060
Page Count	8
File Format	PDF
ISBN	0769509576
DOI	10.1109/RIDE.2001.916489
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2001-04-01
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	XML Delay Transaction databases Scalability Information retrieval Distributed databases Indexing Query processing Contracts Relational databases
Content Type	Text
Resource Type	Article

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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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