Scalable And Usable Web Applications

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  • 1. ArcReady: Architecting for Scalable and Usable Web Applications
  • 2. Agenda
    • SESSION 1: Architecting for Scalable Web Applications
    • 15 Min Break
    • SESSION 2: Architecting for Usable Web Applications
    • Evals & Raffle
  • 3. About Me
    • Clint Edmonson
    • Architect Evangelist
    • [email_address]
    • http://www.notsotrivial.net
  • 4. SESSION 1: Architecting for Scalable Web Applications
  • 5. So you have a scalability problem? Congratulations!
  • 6. References
    • “ Running a megasite on Microsoft Technologies” (MIX06)
    • “ Myspace.com: Megasite V2” (MIX07)
    • “ Amazon.com's Simple Storage Service, Elastic Compute Cloud, and Simple Queue Service” (SAF07)
    • “ Building Scalable Web Sites” Book by Cal Henderson – Flickr architect
  • 7. Scalability <> Performance
  • 8. Scalability is how your application behaves as the number of users increases
  • 9. Performance is how your application behaves when there is just one user
  • 10. Number of Requests Cost per Request
  • 11. Load <> Stress
  • 12. Load is how many simultaneous users your application can serve
  • 13. Stress is how well your application behaves when resources become limited
  • 14. Where are the scalability limits? Network Database Web server Code
  • 15. Pattern: Nickel Defense
  • 16. Pattern: Scale Up
  • 17. CASE STUDY: Scaling up with IIS7 at Dell.com
  • 18.
    • Simplified server management
    • Fewer servers, reduced costs
    • Improved performance
    • Deploy Windows Server ® 2008 Enterprise operating system with Internet Information Services 7.0
    • Implement fully automated server and application deployment
    • Simplify management of servers that run Dell.com
    • Reduce number of servers and rate of server growth
    • Improve site performance to maintain good user experience
    Dell simplifies server management, lowers costs, and increases Dell.com Performance “ Our vision for the Dell.com architecture absolutely requires the new features in Windows Server 2008, which is key to our ability to simplify our online commerce environment.” Ben May, Senior Systems Engineer, Dell
  • 19. PATTERN: Scale Out
  • 20. PATTERN: Specialize Web Services Image Server Web Application
  • 21. PATTERN: Split the application msdn.microsoft.com technet.microsoft.com microsoft.com
  • 22. PATTERN: Split the database 1 Reference Transaction
  • 23. PATTERN: Split the database 2 Write Copy Read Copy Read Copy
  • 24. PATTERN: Geo Distribution
  • 25. PATTERN: Offload the work
  • 26. Anti-patterns
    • Spending all your time looking at the code
    • Caching everything (twice!)
    • Services calling services (especially across the network)
  • 27. DEMO: Team System Load Testing
  • 28. Discussion: “Scale Later”
  • 29. BREAK: 15 Minutes
  • 30. SESSION 2: Architecting for Usable Web Applications
  • 31. PART 1: What’s the Secret Formula?
  • 32. What’s your favorite application?
  • 33. What application do you use the most ?
  • 34. Effective Satisfying Efficient Useful Adaptive Reliable Cost-effective Desirable Usable
  • 35. Experience Engineering User Needs Interaction Design Information Design Visual Design Experiences that create value! + + +
  • 36. PART 2: What is our palette?
  • 37. Application Archetypes Information / Reference E-Commerce Data Viewer/Editor Utility Entertainment Document Viewer/Editor
  • 38. UX Continuum SharePoint ASP.NET+AJAX Gadgets RIAs Infopath OBA Winforms WPF XNA Ubiquity Richness Next Generation
  • 39. SharePoint Sites
  • 40. Standards Based Web Apps (ASP.NET + AJAX & Mashups)
  • 41. Gadgets
  • 42. Rich Internet Applications (Silverlight)
  • 43. Infopath Forms
  • 44. Office Business Applications
  • 45. Standards Based Windows Applications (Winforms)
  • 46. WPF Applications
  • 47. XNA Applications
  • 48. DEMO: UX IQ
  • 49. PART 3: Best Practices
  • 50. Form follows function
  • 51. Create a set of design tenets
  • 52. Use the appropriate level of fidelity
  • 53. DEMO: ProtoXAML
  • 54. Build with the customer and user’s input
  • 55. Build for ease of use ..but don’t forget the power users 70 20 10
  • 56. Plan for concurrency
  • 57. Balance the computing load
  • 58. Balance security with usability
  • 59. Build for supportability & maintenance
  • 60. What are some of your best practices?
  • 61. Contact Me
    • Clint Edmonson
    • Architect Evangelist
    • [email_address]
    • http://www.notsotrivial.net
  • 62. © 2008 microsoft corporation. all rights reserved. this presentation is for informational purposes only. microsoft makes no warranties, express or implied, in this summary.