Twitter: Engineering for Real-Time (Stanford ACM 2011)

2. @rafﬁ Rafﬁ Krikorian Giving a talk at @StanfordACM. Want to know about engineering for real-time? 1 min ago via Twitter for iPhone Favorite Retweet Reply

6. @JordnJnkieJuice ✔Finally✈MF✈Famous✔ EARTHQUAKE !!!!! 1 min ago via Echofon Favorite Retweet Reply

8. @usgs

14. 300 miles to NYC

21. @remedyoakland Remedy Strawberry scones and rhubarb turnovers in the house! 14 Apr via Facebook Favorite Retweet Reply

23. What’s a Tweet?

24. 48 characters +1 for the bird What’s a Tweet? It’s a short message that's sent through 140 characters max

25. 1 tweet

26. sizeof(1 tweet)

27. sizeof(1 tweet)= 140 characters

31. sizeof(1 tweet)≈ 200 bytes

32. sizeof(1 tweet)≈ 200 bytes

33. = 140 characters sizeof(1 tweet) ≈ 200 bytes

34. = 140 characters sizeof(1 tweet) ≈ 200 bytes

35. @Astro_Soichi Soichi Noguchi http://twitpic.com/17dfqb - 8 Mar 10 via TwitPic Favorite Retweet Reply

36. @Astro_Soichi Soichi Noguchi http://twitpic.com/17dfqb - 8 Mar 10 via TwitPic Favorite Retweet Reply

38. About Tweets a day

39. About 230,000,000 Tweets a day

40. 2.3E6 tweets day

41. 2.3E6 tweets 2600 tweets ≈ day second

45. 2.3E6 tweets 2600 tweets ≈ day second steady state

47. 7,196 TPS

49. Tokyo 6,600 TPS

51. 8,800 TPS

53. status/update

54. status/update

55. status/update

56. status/update HTTP 200 OK {

58. status/update HTTP 200 OK

59. status/update HTTP 200 OK

60. st

62. Snowflake https://github.com/twitter/snowflake s

67. s Rockdove

72. t.co

77. Storage {

82. HTTP 200 OK { … "text":"Tweet!" … }

85. status/update HTTP 200 OK { … "text":"Tweet!" … }

89. status/update Fanout HTTP 200 OK { … "text":"Tweet!" … }

91. te Fanout K

92. te Fanout K

93. te Fanout K

94. te Flock Fanout K

95. te Fanout K

96. te Fanout K

101. followed by following

104. @ladygaga mother mons†er 13.2 million followers @justinbieber Justin Bieber 12.4 million followers @BarackObama 44th President of the United States 9.9 million followers @raffi me! 0.01 million followers

105. @ladygaga mother mons†er 13.2 million followers @raffi me! 0.01 million followers

106. @ladygaga mother mons†er 13.2 million followers @raffi me! 0.01 million followers

107. @ladygaga mother mons†er 13.2 million followers @raffi me! 0.01 million followers 10000x more followers than me

108. @ladygaga mother mons†er 13.2 million followers @raffi me! 0.01 million followers scaling for 107

110. Has... ⇢ huge number of concurrent connections ⇢ lots of I/O ⇢ few persistent objects

112. Gosai Kiji Phasianus versicolor also known as Japanese Pheasant is a bird of the lowlands. Closely related to the Common Pheasant, the cock is distinguished by dark green plumage on breast and mantle. The male has an iridescent violet neck, red bare facial skin and purplish green tail. The female is smaller than male, and has a dull brown plumage with dark spots.

113. Gosai Kiji Phasianus versicolor also known as Japanese Pheasant is a bird of the lowlands. Closely related to the Common Pheasant, the cock is distinguished by dark green plumage on breast and mantle. The male has an iridescent violet neck, red bare facial skin and purplish green tail. The female is smaller than male, and has a dull brown plumage with dark spots.

116. needS... ⇢ ability to handle server workloads

117. needS... ⇢ ability to handle server workloads ⇢ flexibility in language

122. needS... ⇢ ability to handle server workloads ⇢ flexibility in language ⇢ a real concurrency model

123. finagle |fəˈnāgəl| needS... verb [ trans. ] informal obtain (something) by devious or dishonest means : Ted attended all the football games he could finagle tickets for. • [ intrans. ] act in a devious or dishonest manner : they wrangled and finagled over the fine points. ⇢ ability to handle server workloads DERIVATIVES ⇢ flexibility in language finagler |fəˈnāg(ə)lər| noun ⇢ a real concurrency model ORIGIN 1920s (originally U.S.): from dialect fainaigue [cheat] ; perhaps from Old French fornier ‘deny.’

126. finagle |fəˈnāgəl| verb [ trans. ] informal needS... obtain (something) by devious or dishonest means : Ted attended all the football games he could finagle tickets for. • [ intrans. ] act in a devious or dishonest manner : they wrangled and finagled over the fine points. ⇢ ability to handle server workloads DERIVATIVES ⇢ flexibility in language finagler |fəˈnāg(ə)lər| noun ⇢ a real concurrency model ORIGIN 1920s (originally U.S.): from dialect fainaigue [cheat] ; perhaps from Old French fornier ‘deny.’

129. ’S Infrastructure trades in... ⇢ RAM & CPU ⇢ bandwidth ⇢ machine density

133. Switching to doesn’t imply that is a mistake

136. is a Real-Time Event-driven & Problem

138. What happens in the World happens on

140. Follow me at Questions? twitter.com/raffi

Twitter: Engineering for Real-Time (Stanford ACM 2011)

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