2. Good Afternoon • A little background. • The nature of caching • How cache becomes cash. • Businesses that use the power of web cache • Predicting the future. • Observations and suppositions based on demand and industry trends

3. A little background.The Nature of Web Caching

4. Understanding the concept • Definition: a high-speed storage mechanism that returns frequently needed information • Example: a Library

5. Understanding the concept • What uses cache? • Computers • Peripherals • Networks • Web servers

6. Floppy disk drive CD-ROMs Processors L1 and L2 Cache Motherboards Internet Explorer Netscape Mozilla Konquerer Windows Media Player Specific Cache Applications

7. Simple/device caching the latency time cache hit cache miss Fixed level cache the latency time(s) cache query cache hit cache miss Evolutionary steps Clustered/multi-level cache • Node latency • Update heuristics • Fragments /ESI Intelligent Variable Dynamic Architecture • Dynamic landscape • Rapid delivery system acquisition / subscription

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9. Web Caching Overview

10. Web Caching with Clusters

11. Quiz time! Question – name some applications of caching Question – T/F – The web caching system is built into/part of the Application Server Question – what is the practical value of web caching?

12. The Nature of Caching • Do you have any Questions?

13. How cache becomes cash.Businesses that use the power of web cache

14. Technical features of caching systems Efficient Use of Low-Cost Hardware • Automatically compresses Web pages for faster delivery to browsers and reduced bandwidth expenditures • Caches static Web content, including: • Text (HTML, XML, CSS, etc.), Images (GIF, JPEG, etc.), Audio, Video, Java Applets • Caches dynamic Web content, including: • JSPs, Servlets, ASPs, CGI, Python, PHP, ColdFusion, etc. • Pages with cookies, personalized attributes, session-encoded URLs, requests with URL and POST body parameters

15. Technical features of caching systems • Provides partial-page caching and page assembly for personalized applications – based on open Edge Side Includes (ESI) and Edge Side Includes for Java (JESI) standard markup languages • Provides order-of-magnitude performance improvement for Web-based applications • Ideal for accelerating catalogs, auctions, exchanges, enterprise portals, packaged or home-grown CRM and ERP applications, business intelligence tools, Web services and syndicated content, wireless-enabled applications, and Internet-facing Web sites

16. Technical features of caching systems Cache Control • Administrator-defined caching policies allow advanced caching and routing decisions based on HTTP header information, including cookies and session-encoded URLs • developers can set caching policies within application logic, making the content self-describing and reducing the number of configuration steps required to deploy the cache • HTTP-based invalidation message model allows expiration and validation policies provide ways forensuring content freshness

17. Technical features of caching systems Flexible Deployments • deployment on the same node (or nodes) as the application Web server(s), or on dedicated hardware. • heterogeneous environments – works seamlessly with third-party HTTP servers, application servers, databases, content management systems, and content delivery network services • deployment behind a third-party network load balancing devicedistributed, hierarchical deployments – often called Enterprise Content Delivery Network (eCDN) deployments – enabling enterprises to distribute cached content to the edge of the network (branch offices, remote sites) and nearer to end users

18. Nuts and bolts of Web Caching • “Can’t cache everything” problem • Solved by ESI (Edge side include) is the programming language used universally for caching systems

20. Edge Side Include

21. Edge Side Include

22. Business benefits of caching systems • Resource usage – higher throughput and scalability • User experience – faster response times without sacrificing personalization / customization • Availability – intelligent workload management • Productivity –faster time-to-market • Bottom line – reduced infrastructure load = cost savings • Intelligence – better visibility and end-user service levels

23. Quiz time! Question – How many caching servers can be utilized at a time? Question – What is the markup language for designating fragments of a dynamic site / portal? Question – name a benefit of web caching

24. Turning Cache into Cash • Do you have any Questions? • What about the future?

25. Predicting the future.Observations and suppositions based on demand and industry trends

26. Future Schema • Flexible Architecture

27. Future Schema • Artificial Intelligence • Pattern Guessing • Server Subscription • Similar to DCHP • Evolution of ESI • Refinement of Heuristics

28. Industry Trends • More universal / open on heterogeneous platforms • Oracle 10g can work with BEA, IBM, etc. etc.

29. Quiz time! Question – what are some future inventions you foresee with web caching? Question – what is a dynamicsite you use frequently thatcould be accelerated?

30. Thank you! • Any other questions on web web caching? • Contact Information • Mac_Clemmens@csumb.edu • Please feel free to e-mail me with any questions