1. 글로벌$CDN서비스와$웹$성능$향상$방법론$
rev.%3%

2. Contents$
!
!
!
!
!
!
DevOn$2012$

3. 글로벌$인터넷$환경$
DevOn$2012$

4. 한국$인터넷$속도$
%
©%2012%Akamai%Technologies,%Inc.%All%Rights%Reserved%%
DevOn$2012$

5. 그러다$보니L$
From%“Korea%Web%Index”%2012/05%
©%VivaNS%All%rights%reserved%
DevOn$2012$

6. 해외로$나갈때의$인터넷$latency$
Moscow:$323ms$
Tokyo:$40ms$ New$York:$224ms$$
London:$316ms$
LA:$???ms$
Shanghai:$69ms$$
Sao$Paulo:$329ms$
Sydney:$161ms$
Capetown:$???ms$
DevOn$2012$

7. 웹은$빨라야$한다$
DevOn$2012$

8. DevOn$2012$

9. DevOn$2012$

10. DevOn$2012$

11. Web$Performance$MaJers!$
11%seconds%
(Before)%
2%seconds%
(AQer)%
Rest%of%
World%
China%
CDNetworks Confidential
Web%Performance%=%Revenue% 11

12. Content$Delivery$Network$
DevOn$2012$

13. 웹$사이트의$트래픽$패턴$
•
•
•
DevOn$2012$

14. Content$Delivery$Network$
!
!
!
!
!
!
!
!
DevOn$2012$

15. 국가/ISP$CDN$과$글로벌$CDN$
!
!
DevOn$2012$

16. 글로벌$CDN$구성도$

17. 로드밸런싱$-$www.kr.cdnetworks.com$lookup$
Root$DNS$(.com,$.net)$
(1)% “What’s%DNS%Server%IP%address%of%cdnetworks.com?”%
“What’s%DNS%Server%IP%address%of%cdngc.net?”%
“What’s%IP%address%of%www.kr.cdnetworks.com?”%
(2)%
Resolver/$ DNS$for$cdnetworks.com%
End$User$ Local$DNS$
Browser$ “www.kr.cdnetworks.com%is%www.kr.cdnetworks.cdngc.net”%
(3)%
DNS$for$cdngc.net$(GSLB)%
“What’s%IP%address%of%www.kr.cdnetworks.com.cdngc.net?”%
“61.110.226.28%and%61.110.226.15”%(IP$of$Edge$Cache)$
DevOn$2012$

18. CDN$시스템$구성$
Data$Center,$or$PoP$(Point$Of$Presence)$
Cache$
Streaming Storage
Monitoring
Router GSLB$
Cache Management
Cache Log%Processing
Storage
Monitoring Operator%Portal
Router Customer%Portal
Cache Admin$PoP$or$Control$Center$
Cache Storage
Monitoring
Router
DevOn$2012$

19. 글로벌$CDN의$효과$
최상위$페이지$로딩$속도$(초)$
25.0%
20.0%
15.0%
10.0%
5.0%
0.0%
DevOn$2012$

20. 직접$구축하려면?$
!
!
!
!
DevOn$2012$

21. 성능$측정$
DevOn$2012$

22. 웹사이트$성능$측정$
!
!
!
!
DevOn$2012$

23. 측정$방법$
!
“waterfall%chart”%
DevOn$2012$

24. Waterfall$Chart$Example$ê$webpagetest.org$
DevOn$2012$

25. 자동으로$측정$
!
!
hp://www.cdnetworks.com/wp^content/uploads/2011/05/dwa_home.jpg%(76485%bytes)%
DNS$lookup$ ConnecZon$Time$ (SSL$Time)$ TTFB$ Transfer$Time$
4ms$ 2ms$ 0ms$ 143ms$ 132ms$
DevOn$2012$

26. 각$시간별$봐야$할$것들$
!
!
!
!
!
DevOn$2012$

27. 자동으로$측정$방법$
!
!
!
DevOn$2012$

28. 웹사이트$최적화$
DevOn$2012$

29. 웹사이트$최적화$
!
!
!
DevOn$2012$

30. Make$the$Web$Faster$
!
!
!
!
!
DevOn$2012$

31. TCP$최적화$-$initcwnd$
!
!
!
!
!
www.cdnplanet.com%
DevOn$2012$

32. initcwnd$최적화$결과$
•
•
DevOn$2012$

33. FEO$(Front$End$Optimization)$
!
!
!
!
DevOn$2012$

34. Experiment%by%tuning
자동$FEO$는$만능이$아님!$
Req%No.%
Req%No.%
%47.5%%
%32.2%%
Sent%Size%
Sent%Size%
29.3%% 46.3%%
Receive%Size%
Receive%Size%
4.3%%% 5.4%%%
Loading%Time%%
Loading%Time%%
28.6% %
0% %

35. Advanced$Topics$
DevOn$2012$

36. Advanced$Topics$
!
! Mobile$Network$RTT$Latency$
200%
180%
160%
140%
120%
100%
Latency%(ms)%
80%
60%
40%
20%
0%
WCDMA% HSDPA%rel5% HSDPA%rel6% LTE%
hp://www.accedian.com/blog/news/lte^requires^latency/%
DevOn$2012$

37. 감사합니다$
DevOn$2012$