Douban Infrastructure Text Describes Web and Database Architecture
•
7 likes•530 views
This document summarizes the architecture and infrastructure of Douban.com. It describes how Douban uses Gentoo Linux, MySQL, Memcached, Quixote (Python web framework), and Lighttpd across multiple servers. It discusses strategies for scaling including replication, load balancing, and adding additional application servers. It also describes the evolution of Douban's storage systems from Memcache to DoubanFS to DoubanDB.
Recommended
More Related Content
What's hot
What's hot (18)
Similar to Douban Infrastructure Text Describes Web and Database Architecture
Similar to Douban Infrastructure Text Describes Web and Database Architecture (20)
More from shen liu
Recently uploaded
Recently uploaded (20)
Douban Infrastructure Text Describes Web and Database Architecture
- 1. Text 2009.4 hongqn@douban.com
- 2. • 2005 3 • • •
- 3. • 2.8M 1/4 • • 20M / 500~600/sec • 23 PC (1U*15/2U*8) • 12 • 38G memcached
- 4. • 1U (frodo) • AMD Athlon 64 1.8GHz • 1G 160G SATA*2 • Gentoo Linux • MySQL 5 • Quixote (a Python web framework) • Lighttpd + SCGI (shire) • Memcached (!)
- 5. Internet Lighttpd SCGI App FS MySQL Memcache Static Files
- 6. Gentoo Linux • • emerge mysql • ebuild patch • • • GLSA(Gentoo Linux Security Advisories)
- 7. MySQL • The world’s most popular open source database • / ==> MyISAM • ==> InnoDB • Replicate for backup
- 8. Python • • Battery Included • • • CPUG: http://python.cn/
- 9. Quixote • REST URL • Django, TurboGears, Pylons ZOPE • http://www.douban.com/subject/1000001 # luz/subject/__init__.py def _q_lookup(request, name): subject = get_subject(name) return lambda req: subject_ui(req, subject) # luz/subject/subject_ui.ptl def subject_ui [html] (request, subject): site_header(request) “<h1>%s</h1>” % subject.title site_footer(request)
- 10. Lighttpd • • SCGI • SCGI: FastCGI Quixote • 80 lighttpd SCGI localhost Quixote
- 11. Memcache • MySQL • libmemcache python Pyrex python 3x+ def get_subject(subject_id): subject = mc.get(‘s:’+subject_id) if subject is None: store.farm.execute(“select xxx, xxx from subject where id=%s”, subject_id) subject = Subject(*store.farm.fetchone()) mc.set(‘s:’+subject_id, subject) return subject
- 12. • 1.2M / • IO •
- 13. • 1U • pippin meriadoc ( merry) • , 4G 250G SATA*3 • • IP DNS IP -_-b • frodo (subversion, trac, etc...)
- 14. Internet Lighttpd (#$) DNS HTTP Proxy SCGI App Lighttpd (!quot;) FS Static Files Memcache MySQL
- 15. • • innodb_buffer_pool_size • • IP
- 16. • 1.5M / • • IP
- 17. • IP(BGP) • (arwen) • 74G 1w SATA * 3 • •
- 18. Internet Data Lighttpd Mining read SCGI write App Replicate MySQL MySQL Master Slave Memcache Static Files
- 19. • 2M / • IO • , etc... •
- 20. • 4G 250G SATA*3 • 10000 • mod_rewrite URL • lighttpd mod_memcache • IO • web • •
- 21. Internet store.farm App MySQL SCGI Master Lighttpd Memcache Replicate store.farmr HTTP Proxy WebDAV Web Service Replicate Lighttpd (w/ mod_memcache) MySQL write Slave Spiders Lighttpd WebDAV Memcache Static Files !quot;#$% read Data Mining MySQL Slave
- 22. • store farmr • replicate delay • • • cache • • • ...... but it works
- 23. replicate delay def get_subject(sid): sbj = mc.get(‘s:’+sid) if sbj is None: sbj = flush_subject(sid, store.farmr) return sbj def flush_subject(sid, cursor=None): cursor = cursor or store.farm cursor.execute(“select ... from subject”) subject = Subject(*cursor.fetchone()) mc.set(‘s:’+sid, subject) return subject def update_subject(subject, props): store.farm.execute(“update subject ...”) store.farm.connection.commit() flush_subject(subject.id, store.farm)
- 24. • 2.5M / • • / • SATA •
- 25. • Scale Up 1U • 16G 147G SCSI *2 + 500G SATA • SCSI RAID-0 • MySQL Slave • memcached • MyISAM InnoDB • • Sphinx
- 26. Internet Sphinx MySQL Master store.farm Web Service Replicate Lighttpd SCGI App HTTP Proxy Memcache Lighttpd (w/ mod_memcache) WebDAV store.farmr Memcache Lighttpd Web Service WebDAV MySQL Static Files Slave Spiders Memcache Memcache
- 27. • 5.2M / • • Web IO • •
- 28. • :) • • • • 3 1U 4 32G 1T SATA * 3 • otho.douban.com lotho.douban.com • lighttpd 1.5 with aio support • LVS • Scale Up: 4G -> 8G
- 29. Internet www.douban.com otho.douban.com LVS LB (Master) Lighttpd Lighttpd 1.5 (w/ mod_cache) HTTP Proxy Lighttpd Keepalived LVS LB (backup) Lighttpd Lighttpd 1.5 WebDAV (w/ mod_cache) Static Files
- 30. write !quot;#$% replicate read Data Mining MySQL MySQL Slave Master read Replicate write !quot;#$% Data Mining MySQL Slave
- 31. • 6.4M / (5M PV) • • • CPU memcache /
- 32. • • lighttpd mod_scgi round-robin • lighttpd 1.5 • mod_proxy • proxy.balance = fair (load based, passive balancing) • • spread
- 33. Internet Lighttpd SCGI HTTP Proxy App Memcache Lighttpd HTTP Proxy spread HTTP Proxy Lighttpd Lighttpd Log Aggregator SCGI spread Lighttpd Memcache App WebDAV Static Files
- 34. • 11M / 3 • • Sphinx • • load
- 35. • • • • Sphinx -> Xapian • MogileFS
- 36. • libmemcache -> libmemcached consistent hash memcache • libmemcached consistent hash bug • CPU • libmemcached failover bug • nginx lighttpd load balance • spread • nginx
- 37. !quot; Master replicate replicate !quot; %&'() Slave #$ Master read replicate Data #$ read Slave Mining write *+,- !quot; Master Slave replicate *+,- Slave write replicate Data %&'() Mining #$ Slave
- 38. • • store.farm[r] -> store.get_cursor(table=‘xxx’, ro=True/False) def flush_subject(sid, ro=False): cursor = store.get_cursor(table=‘subject’, ro=ro) cursor.execute(“select ... from subject”) subject = Subject(*cursor.fetchone()) mc.set(‘s:’+sid, subject) return subject •
- 39. Internet upload.douban.com otho.douban.com Lighttpd 1.5 signed POST form Uploader (w/ mod_cache) HTTP redirect FileStorage MogileFS Tracker Gateway App MogileFS MogileFS Node Node MogileFS Master
- 40. Internet App SCGI Lighttpd HTTP Proxy Lighttpd HTTP Proxy App HTTP Proxy SCGI Lighttpd HTTP Proxy Nginx Lighttpd HTTP Proxy App Lighttpd SCGI Lighttpd WebDAV Static Files
- 41. • 13M / • MogileFS • Tracker DB •
- 42. • 8 • 32G CPU • (300G SCSI×2 + 1T SATA) × 3 • (1T SATA × 3) × 5 •6 2 • DoubanFS
- 43. DoubanFS • hash • hash hash • Merkle Tree • consistent hash • WebDAV • MogileFS 3 50
- 44. Consistent Hash
- 45. Merkle Tree
- 46. Internet upload.douban.com otho.douban.com Lighttpd 1.5 signed POST form Uploader (w/ mod_cache) HTTP redirect FileStorage Gateway App DoubanFS DoubanFS Node Node
- 47. • 16M / • • DoubanFS IO •
- 48. • DoubanDB • • MySQL • MySQL Master • failover • replicate delay
- 49. DoubanDB • Key-Value • Amazon Dynamo • set(key, value), get(key), delete(key) • memcache • Merkle Tree • Consistent Hash • TokyoCabinet • DoubanDB • DoubanFS 2.0 DoubanDB
- 51. !quot; Master1 replicate replicate !quot; %&'() Slave #$ Master1 read replicate Data #$ read Slave Mining write *+,- !quot; Master Master2 replicate *+,- Slave write replicate Data %&'() Mining #$ Master2
- 52. • DoubanFS • • • ngnix • www.douban.com LVS • RabbitMQ spread
- 53. • • profile • memcache cache • join • •