This document describes the author's career experience developing web applications from 2003 to 2010. It outlines some of the technical challenges faced at each job, including issues with the database, web server performance, and scaling to handle increased traffic. It also details the technologies and architectures used to solve these problems, such as moving to NoSQL databases, implementing a content delivery network, and using caching with Memcached.

1. Web

2. ABOUT ME
/
@alcoholwang
alcoholwang@gmail.com

3. 2003 Web 2.0
2000 100 1700
400M / 2000 /
3000 / 600
50%
35 / 102

4. 2003 - 2004
www.zsurvey.com
ASP
Access
0.4 /
2

5. TROUBLE
Web DB
SQL Server
ASP.Net 1.1
2

6. 2005 - 2007
www.dianping.com
ASP.Net 1.1
SQL Server
7
180 /
8

7. TROUBLE

8. Web
CSS / JS
YUI Compressor / Google Closure Compiler
JS
jpegoptim / OptiPNG / PNGOUT
GZip

9. i1 / i2 / i3 .dpfile.com
Cookie
Expires Cache-Control

10. TROUBLE
DNS

11. DNS
Software
Nginx / LVS
Hardware
Session Session

12. TROUBLE
CDN

13. http://i2.dpfile.com/s/css/g.base.css?v=22
http://i2.dpfile.com/s/css/g.base.v22.css
↓
/data/static/s/css/g.base.css

14. 2008 - 2010
ASP.Net 2.0 / 3.0 / 3.5
MySQL + NoSQL
Memcached
MogileFS
Lucene
18
73

15. TROUBLE
IO

16. MogileFS / FastDFS / BeansDB / Taobao TFS

17. TROUBLE

19. List<Shop>
↓
List<ShopIDIndex>
Shop
Shop
Shop
↓
mget

20. CPU
DAO ⇢ + AOP

21. Lazy Delete
Cache Provider ↣ Cache Object Version
Shop_{ShopID}
Shop_{ShopID}_{Version}

22. CPU
DAO ⇢ + AOP
Memcached Consistent-Hash

24. TROUBLE

25. NoSQL Redis / MongoDB

26. TROUBLE

27. MemcacheQ / Redis

28. !1"231245:/77/2
C&D'3"4&%E(F"GE(3H
!1"2312456+"7&8/+9
!1"231245:";<124
@&+A1;&'3+/A1)&+
?%&+'@&+A1;& BB @</*'@&+A1;&
,-. =0&+> !"#"'-/0#&+
!"#"$"%&'()"*#&+

29. Memcached
No SQL Join
DNS CDN
Debug