Twitter Rules

Slideshow Transcript

1. Slide 1: Twitter Rules! Sugree Phatanapherom sugree@gmail.com http://sugree.com/
2. Slide 2: Twitter  Social messaging service  140 characters  Follow friends  Notification – gtalk, sms  Open APIs  My twitter – http://twitter.com/sugree  Clients – Twitterific, TwitterFox, Snitter, Spaz, Tweetr, TinyTwitter, Jitter
3. Slide 3: Behind Twitter  Ruby on Rails  Mongrel cluster  Starling MemCache  Master/slave MySQL  Erlang ejabberd
4. Slide 4: Stability?  Twitter is stable as long as there is no big event, e.g., MacWorld 2008  In other words, it is scalability issue!
5. Slide 5: Scale of Twitter  Assumption #1  10,000 users  1 update/hour = 3 req/sec  3 minutes refresh interval = 55 req/s  Assumption #2  100,000 users  1 update/hour = 27 req/sec  3 minutes refresh interval = 555 req/s
6. Slide 6: BitTorrent Tracker  Assumption #1  10,000 users  30 minutes announce interval = 8 req/s  Assumption #2  100,000 users  30 minutes announce interval = 83 req/s
7. Slide 7: Fact Apr 2007  http://www.slideshare.net/al3x/scaling-twitter- railsconf-2007  200-300 req/s  Spike at 800 req/s  Peak at 11,000 req/s  2,400 queries/s
8. Slide 8: Fact Apr 2007  Mongrels 19 cores  Message queue 16 cores  Jabber 2 cores  MySQL 8 cores (single box)  16+ GB MemCache  32 cores total
9. Slide 9: Why Twitter?  E-mail  Leave messages in mailbox  Wait for read/reply or  Call/SMS/IM to notify  IM  Wait for online  Twitter  Tweet to IM, to SMS and/or to e-mail
10. Slide 10: IRC and Twitter  Per channel  Broadcast broadcast  Follow  Join/part/kick/ban +on/_/off/unfollow  Direct message  Direct message  On-line only  Always on-line  Web  Web  IM  IM  Client  SMS  APIs
11. Slide 11: What are actually in Twitter?  What are your friends doing?  Thoughts  Questions  Answers  Opinions  etc...
12. Slide 12: Fun to  Follow friends  Ask and reply on the road  Get reply promptly  Track words
13. Slide 13: How to Twitter  Go to http://twitter.com/  Sign up  Bind your gtalk and twitter@twitter.com  Bind your phone  Charge rate depends on your career  True Move – receive free / send 9 baht
14. Slide 14: Add-on services  http://twitterfeed.com/  http://www.loudtwitter.com/  http://twitternotes.com/  http://twittercal.com/  http://twittervision.com/
15. Slide 15: Clients  AIR – Spaz, Snitter, Tweetr  Firefox – Tweetbar, TwitterFox  Gnome – gTwitter  J2ME – TinyTwitter, Jitter  iPhone – Thincloud, Hahlo  Binding – Python, Ruby, PHP
16. Slide 16: Wanna try?  The best way to understand the power of Twitter is to give it a try  Bind gtalk  And ”follow sugree”