1. Web Prefetch 張燕光 資訊工程系 成功大學 ykchang@mail.ncku.edu.tw

2. 2 Introduction Prefetch a web page before a user really request this page. Prefetch can be performed in 3 ways: –Between browser clients and Web servers. –Between proxies and Web servers. –Between browser clients and proxies. Initiating agent –Client-side prefetch –Server-side prefetch

3. 3 Server-Initiated prefetch Predictive prefetch from BerkeleyPredictive prefetch Idea: –Typically, there is a pause after each page is loaded for reading the loaded page –Serve computes the likelihood that a particular page will be accessed next and conveys this information to the client

4. 4 Server-Initiated prefetch Top-10 approach from ICS FranceTop-10 approach Combine server’s active knowledge of their most popular pages (top-10) with client access profiles.

5. 5 Proxy-Initiated prefetch Approach from Wisconsin MadisonApproach Idle time between requests Proxy predicts which pages a user will access in the near future based on reference patterns observed from many users.