01913nas a2200133   4500008004100000245009500041210006900136260001000205300001300215520137100228100002101599700002001620856013901640       2003                        eng d00aPerformance Evaluation of a Hybrid Run-time Management Policy for Data intensive Web Sites0 aPerformance Evaluation of a Hybrid Runtime Management Policy for  cMarch  a 23 - 473 aThe issues of performance, response efficiency and data consistency are among the most important for data
intensive Web sites. In order to deal with these issues we analyze and evaluate a hybrid run-time management
policy that may be applied to data intensive Web sites. Our research relies on the performance evaluation of
experimental client/server configurations. We propose a hybrid Web site run-time management policy that may
apply to differentWeb site request patterns and data update frequencies. A run-time management policy is viewed
as a Web page materialization policy that can adapt to different conditions at run-time. We define a concept
that we have named the Compromise Factor (CF), to achieve the relationship between current server conditions
and the materialization policy. The issue of Web and database data consistency is the driving force behind our
approach. In some cases though, we prove that certain compromises to consistency can be beneficial to Web
server performance and at the same time be unnoticeable to users. We first present a general a comparative cost
model for the hybrid management policy and three other related and popular Web management policies. We then
evaluate the performance of all the approaches. The results of our evaluation show that the concept of the CF may
be beneficial to Web servers in terms of performance.1 aBouras, Christos1 aKonidaris, Agis  uhttp://telematics.upatras.gr/telematics/publications/performance-evaluation-hybrid-run-time-management-policy-data-intensive-web-sites