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blog.reddit -- what's new on reddit: POTUS IAMA Stats


Stashed in: Reddit!, Scaling

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In preparation for the IAMA, we initially added 30 dedicated servers (20%~ increase) just for the comment thread. This turned out not to be enough, so we added another 30 dedicated servers to the mix. At peak, we were transferring 48 MB per second of reddit to the internet. This much traffic overwhelmed our load balancers which caused a lot of the slowness you probably experienced on reddit.

This IAMA gave us a lot of information on what we need to do next not only to handle the next megathread on reddit, but also to make reddit faster in general. We’re going to redesign our load balancer system to be more flexible under this kind of load, and we’ve got a bunch of things we need to do to make our code more efficient for giant comment threads. Both of these improvements should make day-to-day reddit use faster as well.

Any information about the whole Reddit architecture?

They used to have 150 servers but now they have 210?

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