1 / 10

Java-Based Adaptive Web Caching

Java-Based Adaptive Web Caching. CS-526 Fall 2002 Semester Project G. Williams. Adaptive Web Caching. Related Work - Lixia Zhang, Sally Floyd, and Van Jacobson, "Adaptive Web Caching," April 25, 1997. Problem - Data dissemination to thousands or millions of users on the Internet.

luke-foley
Download Presentation

Java-Based Adaptive Web Caching

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Java-Based Adaptive Web Caching CS-526 Fall 2002 Semester Project G. Williams

  2. Adaptive Web Caching • Related Work - Lixia Zhang, Sally Floyd, and Van Jacobson, "Adaptive Web Caching," April 25, 1997. • Problem - Data dissemination to thousands or millions of users on the Internet. • Solution - Web Multicasting and Caching

  3. Adaptive Web Caching • IP multicast serves two purposes • The most efficient way to deliver the same data to multiple receivers. • An information discovery vehicle. For example, a host can multicast a query to a relevant group when it does not know exactly whom to ask.

  4. Proposed Approach • Researched some exisiting “Adaptive” caching servers, primarily Squid. • Developed an Adaptive Web Caching (Proxy) Server “proof-of-concept” based on ideas from Zhang, Floyd, and Van Jacobson.

  5. Custom Enhancements • Web servers don’t need to implement multicasting to deliver content - This allows existing web servers on the Internet to be used with the system • Servers share cached content dynamically – Local Cache is populated by snooping data being sent amongst servers in the multicast group.

  6. Sample Configuration # Multicast Proxy Server Configuration File # Port Number, Default 8080 Port 8080 # Cache Directory CacheRoot=cache # Default TTL for a cached document in minutes CacheDefaultExpire 15 # Multicast Group Address MulticastGroupAddress 228.5.6.7 # Multicast port on which to send requests MulticastRequestPort 1234 # Multicast port on which to receive replies MulticastResponsePort 6789 # The maximum time in milliseconds to wait for a response before # retrieving the document from the origin server. MaxResponseWaitTime 500

  7. “Proof-of-Concept” Test Cases • Stand-Alone Server • No Multicasting • Multiple Cache Updates • two or more instances sharing cache data • Retrieve Content from Group • Request from neighbors before contacting the origin server • Adaptive Caching • Adding more servers to a group, no changes required – system adapts.

  8. References • Project Web Page (Source Code, Documentation etc.) http://cs.uccs.edu/~gawillia/project.html • [FLOYD97] Lixia Zhang, Sally Floyd, and Van Jacobson, "Adaptive Web Caching," April 25, 1997.http://cs.uccs.edu/~cs526/advancedCache/floydPosition.pdf • [RFC 2616] Hypertext Transfer Protocol - HTTP/1.1, Request for Comments http://www.ietf.org/rfc/rfc2616.txt • [RFC 1112] Host Extensions for IP Multicasting, Request for Comments http://www.faqs.org/rfcs/rfc1112.html • [IANA]: Internet Assigned Number Authority, Internet Multicast Addresseshttp://www.iana.org/assignments/multicast-addresses • [SQUID02] Squid Web Proxy Cache http://www.squid-cache.org/

More Related