Search (3 results, page 1 of 1)

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Abstract

The Internet Web environment opens up extraordinary opportunities for user access to information. Techniques for monitoring users and systems and for evaluating system design and performance have not kept pace with Web development. This article reviews concepts of Web operations (including browsers, clients, information retrieval applications, servers, and data communications systems) with specific attention given to how monitoring should take place and how privacy can be protected. It examines monitoring needs of users, systems designers, managers, and customer support staff and outlines measures for workload, capacity, and performance for hardware, software, and data communications systems. Finally, the article proposes a client-server design for monitoring, which involves creation of a series of server and client systems to obtain and process transaction and computer performance information. These systems include: a log server, which captures all levels of transactions and packets on the network; a monitor server, which sythesizes the log and packet data; an assistance server, which processes requests for information and help from the Web server in real time; and an accounting server, which authenticates user access to the system. A special system administrator client is proposed to control the monitoring system, as is a system information cleint to receive real-time and on-demand reports of system activity

Theme

Internet

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Abstract

This article reports on a model and patterns of use of a library catalog that can be accessed through the Internet. Three categories of users are identified. individuals who perform a search of the catalog, tourists who look only at opening pages of the library catalog's site, and Web spiders that come to the site to obtain pages for indexing the Web. A number of types of use activities are also identified, and can be grouped with the presearch phase (which takes place before any searching begins): the search phase, the display phase (in which users display the results of their search), and phases in which users make errors, ask the system for help or assistance, and take other actions. An empirical investigation of patterns of use of a university Web-based library catalog was conducted for 479 days. During that period, the characteristics of about 2.5 million sessions were recorded and analyzed, and usage trends were identified. Of the total, 62% of the sessions were for users who performed a search, 27% were from spiders, and 11% were for tourists. During the study period, the average search session lasted about 5 minutes when the study began and had increased to about 10 minutes 16 months later. An average search consisted of about 1.5 presearch actions lasting about 25 seconds, about 5.3 display actions, and 2.5 searches per session. The latter two categories are in the range of 35-37 seconds per session each. There were major differences in usage (number of searches, search time, number of display actions, and display time), depending upon the database accessed

Theme

Internet

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Theme

Internet