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Z39.50 broadcast searching and Z-server response times: perspectives from CC-interop

Macgregor, George (2005) Z39.50 broadcast searching and Z-server response times: perspectives from CC-interop. Online Information Review, 29 (1). pp. 90-106. ISSN 1468-4527

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    Abstract

    This paper begins by briefly outlining the evolution of Z39.50 and the current trends, including the work of the JISC CC-interop project. The research crux of the paper focuses on an investigation conducted with respect to testing Z39.50 server (Z-server) response times in a broadcast (parallel) searching environment. Customised software was configured to broadcast a search to all test Z-servers once an hour, for eleven weeks. The results were logged for analysis. Most Z-servers responded rapidly. 'Network congestion' and local OPAC usage were not found to significantly influence Z-server performance. Response time issues encountered by implementers may be the result of non-response by the Z-server and how Z-client software deals with this. The influence of 'quick and dirty' Z39.50 implementations is also identified as a potential cause of slow broadcast searching. The paper indicates various areas for further research, including setting shorter time-outs and greater end-user behavioural research to ascertain user requirements in this area. The influence more complex searches, such as Boolean, have on response times and suboptimal Z39.50 implementations are also emphasised for further study. This paper informs the LIS research community and has practical implications for those establishing Z39.50 based distributed systems, as well as those in the Web Services community. The paper challenges popular LIS opinion that Z39.50 is inherently sluggish and thus unsuitable for the demands of the modern user.

    Item type: Article
    ID code: 1238
    Keywords: Z39.50, catalogues, union catalogues, distributed searching, information retrieval, SRW, interoperability, Databases, Library and Information Sciences, Information Systems, Computer Science Applications
    Subjects: Bibliography. Library Science. Information Resources > Information resources > Databases
    Department: Faculty of Science > Computer and Information Sciences
    Related URLs:
      Depositing user: Strathprints Administrator
      Date Deposited: 09 Jun 2006
      Last modified: 04 Sep 2014 13:21
      URI: http://strathprints.strath.ac.uk/id/eprint/1238

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