Learning response time for WebSources using query feedback and application in query optimization
نویسندگان
چکیده
منابع مشابه
DO NOT DISTRIBUTE Learning Response Time for WebSources using Query Feedback and Application in Query Optimization
The rapid growth of the Internet and support for interoperability protocols has increased the number of Web accessible sources, WebSources. Current wrapper mediator architectures need to be extended with a Wrapper Cost Model (WCM) for WebSources that can estimate the response time (delays) to access sources as well as other relevant statistics. In this paper, we present a Web Prediction Tool (W...
متن کاملFeedback-Directed Query Optimization
Current database systems employ static heuristics for estimating the access time of a particular query. These heuristics are based on several parameters, such as relation size and number of tuples. Yet these parameters are only updated intermittently, and the heuristics themselves are hand-tuned. As trends in database systems aim toward self-tuning systems, we can apply the experience of the fe...
متن کاملQuery expansion based on relevance feedback and latent semantic analysis
Web search engines are one of the most popular tools on the Internet which are widely-used by expert and novice users. Constructing an adequate query which represents the best specification of users’ information need to the search engine is an important concern of web users. Query expansion is a way to reduce this concern and increase user satisfaction. In this paper, a new method of query expa...
متن کاملRelational Databases Query Optimization using Hybrid Evolutionary Algorithm
Optimizing the database queries is one of hard research problems. Exhaustive search techniques like dynamic programming is suitable for queries with a few relations, but by increasing the number of relations in query, much use of memory and processing is needed, and the use of these methods is not suitable, so we have to use random and evolutionary methods. The use of evolutionary methods, beca...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The VLDB Journal
سال: 2000
ISSN: 1066-8888
DOI: 10.1007/s007780050081