Towards user-centric web-databases, we propose a Quality Contracts framework to help users express their preferences over multiple quality specifications. Moreover, we propose a suite of algorithms to effectively perform load balancing and scheduling for both queries and updates according to user preferences. We evaluate the proposed framework and algorithms through a simulation with real traces from disk accesses and from a stock information website. Finally, to increase the applicability of Quality Contracts enhanced Web-database systems, we propose an algorithm to help users adapt to the Web-database system behavior and maximize their query success ratio.without hurting much of QoS. ... portals for airline companies and hotel chains ( such as United Airlines and Holiday Inn), as well as third party agents (such as Expedia and Hotwire). It is crucial that user queries on flight, car, and hotel information are answered in a timely fashion, using the most recent data possible . ... Users easily get frustrated by staring at the progress bar or the repeating patterns.
|Title||:||Managing Query and Update Transactions Under Quality Contracts in Web-databases|
|Publisher||:||ProQuest - 2007|