View stunning SlideShares in full-screen with the new iOS app!Introducing SlideShare for AndroidExplore all your favorite topics in the SlideShare appGet the SlideShare app to Save for Later — even offline
View stunning SlideShares in full-screen with the new Android app!View stunning SlideShares in full-screen with the new iOS app!
Giv ing a @twitter t alk at ColumbiaUni versity talking a bout Twitter’sNumbers!22 Feb via Twitter for iPhone ty from Mudd Building at Columbia Universi 500 West 120th Street New York, New York View Tweets at this place
How big are they? 1 tweet text = 140 characters ≈ 200 bytes
1200 tweets per ≈ 230 KB/sec second ≈ 14 MB/min ≈ 19 GB/day Just tweet text!
MySQL Can’t generate IDs fast enoughCentralized and a single point of failure snowflake Highly available and uncoordinated (10kqps) Compatible with the ecosystem http://github.com/twitter/snowflake
ampura mons from ch used under Creative Com Photo1 TB generated 10 TB generated per day per day
10 TBper day in total ≈ 120 MB per sec 80 MB = per sec Photo used u n der Creative C ommons from Mac Users G uide
Where do they go? Followed by Following Asymmetric Digraph
1 Digraph 2 Need to represent this 4 1 2 3 4 31 Matrix2 Naïve implementation is not scalable34