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February 13, 2012

To give you an idea of Tumblr’s massive scale, some quick numbers:

  • 500 million page views go through Tumblr every single day
  • 40k requests added each second at Tumblr’s peak usage hours; and it’s growing, too
  • 50GB of posts added each day; follower list updates are roughly another 2.7 terabytes daily
  • 1M number of writes made through the dashboard each second, and 50,000 reads per second source

» It’s tough to scale, too: According to Blake Matheny, Tumblr’s Distributed Systems Engineer, the service’s broad distribution makes it different from many other social networks, adding complexity that can stress the servers greatly. “It’s not just one or two users that have millions of followers. The graph for Tumblr users has hundreds of followers,” he writes. “This is different than any other social network and is what makes Tumblr so challenging to scale.” Matheny says that people will go back hundreds of pages on the dashboard to read content. And the network will only grow in complexity over time — the site is growing by 30 percent each month, and requires hundreds of servers to do what it has to do. If you’re technically-inclined, read High Scalability’s entire article — it’s super-fascinating.

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21:17 // 2 years ago