Good Afternoon

Good Afternoon

A little background. The nature of caching

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

cachePredicting the future.

Observations and suppositions based on demand and industry trends

A little background.The Nature of Web Caching

Understanding the conceptDefinition: a high-speed storage

mechanism that returns frequently needed information

Example: a Library

Understanding the conceptWhat uses cache?

Computers Peripherals Networks Web servers

Specific Cache Applications

Floppy disk drive

CD-ROMs

Processors L1 and L2

Cache

Motherboards

Internet Explorer Netscape Mozilla Konquerer Windows Media

Player

Evolutionary steps

Simple/device caching1. the latency time 2. cache hit3. cache miss

Fixed level cache1. the latency time(s)2. cache query3. cache hit4. cache miss

Clustered/multi-level cache

1. Node latency2. Update heuristics3. Fragments /ESI

Intelligent Variable Dynamic Architecture

1. Dynamic landscape

2. Rapid delivery system acquisition / subscription

1`212

Web Caching Overview

Web Caching with Clusters

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?

The Nature of Caching

Do you have any Questions?

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

cache

Technical features of caching systemsEfficient 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

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

Technical features of caching systemsCache 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 for ensuring content freshness

Technical features of caching systemsFlexible 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 device distributed, 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

Nuts and bolts of Web Caching“Can’t cache everything” problemSolved by ESI (Edge side include)

is the programming language used universally for caching systems

Edge Side Include

Edge Side Include

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

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

Turning Cache into Cash

Do you have any Questions?What about the future?

Predicting the future.Observations and suppositions based

on demand and industry trends

Future Schema

Flexible Architecture

Future Schema

Artificial IntelligencePattern GuessingServer Subscription

Similar to DCHPEvolution of ESIRefinement of Heuristics

Industry Trends

More universal / open on heterogeneous platforms

Oracle 10g can work with BEA, IBM, etc. etc.

Quiz time!

Question – what are some future inventions you foresee with web caching?

Question – what is a dynamicsite you use frequently thatcould be accelerated?

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