1. COMP9321 Web Application Engineering Semester 1, 2017
Dr. Amin Beheshti
Service Oriented Computing Group, CSE, UNSW Australia
Week 11
(Part I)
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2. Review… Performance
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3. Performance
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4. Scalability
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5. Why does performance and scalability matter ?
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6. Architectural Considerations (Network)
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7. Architectural Considerations - Network
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8. Architectural Considerations - Network
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9. Architectural Considerations - Network
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10. Architectural Considerations (Server)
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11. Architectural Considerations - Server
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12. Architectural Considerations - Server
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13. Architectural Considerations - Server
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14. General Techniques for Improving Performance and Scalability
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15. General Techniques for Improving Performance and Scalability
Caching/Replication
Parallelism
Redundancy
Asynchrony
Resource Pooling
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16. General Techniques for Improving Performance and Scalability
Caching/Replication
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17. General Techniques for Improving Performance and Scalability
2. Parallelism
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18. General Techniques for Improving Performance and Scalability
3. Redundancy
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19. General Techniques for Improving Performance and Scalability
4. Asynchrony
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20. General Techniques for Improving Performance and Scalability
5. Resource Pooling
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21. Improving Performance using HTTP features
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22. Improving Performance using HTTP features
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23. Improving Performance using HTTP features
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24. Improving Performance using HTTP features
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25. Improving Performance using HTTP features
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26. Improving Performance using HTTP features
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27. Improving Performance using HTTP features
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28. Improving Performance using HTTP features
AJAX = Asynchronous JavaScript and XML
Update a web page without reloading the page
Request data from a server - after the page has loaded 
Receive data from a server - after the page has loaded
Send data to a server - in the background
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29. Improving Performance using HTTP features
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30. Improving Database Access
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31. Improving Database Access
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32. Improving Database Access
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33. Improving Database Access
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34. Improving Database Access
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35. Improving Database Access
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36. Improving Database Access
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37. Improving Database Access
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38. Improving Database Access
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39. Improving Database Access
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40. Improving Database Access
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41. Improving Database Access
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42. Improving Database Access
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43. Improving Database Access
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44. Improving Database Access
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45. Improving Database Access
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46. Characteristics of Scalability
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47. Characteristics of Scalability
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48. Characteristics of Scalability
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49. Characteristics of Scalability
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50. Scaling and Request Load Balancing
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51. Scaling & Request Load Balancing
Types of Scaling:
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52. Scaling & Request Load Balancing
Types of Scaling:
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53. Scaling & Request Load Balancing
Request Load Balancing for Horizontal Scaling
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54. Scaling & Request Load Balancing
Request Load Balancing for Horizontal Scaling
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55. Scaling & Request Load Balancing
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56. Scaling & Request Load Balancing
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57. Scaling & Request Load Balancing
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58. Scaling & Request Load Balancing
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59. Scaling & Request Load Balancing
Hours and Wages
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60. Scaling & Request Load Balancing
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61. Scaling & Request Load Balancing
Application-Level Load Balancing with Stateless Logic
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62. Scaling & Request Load Balancing
Application-Level Load Balancing with Stateless Logic
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63. Scaling & Request Load Balancing
Application-Level Load Balancing with Stateless Logic
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64. Scaling & Request Load Balancing
Scaling Databases - Replication
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65. Scaling & Request Load Balancing
Scaling Databases - Replication
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66. Scaling & Request Load Balancing
Scaling Databases - Replication
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67. Scaling & Request Load Balancing
Scaling Databases - Replication
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68. Scaling & Request Load Balancing
Scaling Databases - Replication
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69. References
Building Scalable and High-performance Java Web Applications by Greg Barish, Addison Wesley
Building Scalable Web Sites by Cal Henderson, O’Reilly Books
Gregor Roth, ”Server load balancing architectures”, JavaWorld, October 2008
http: //
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70. Next Big Data: Challenges and Opportunities
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71. COMP9321, 17s1, Week 11