Harrison Fisk, engineering manager at Facebook, talks about the storage considerations and challenges in serving Facebook's graph and includes an overview of TAO, Facebook's distributed graph storage system built on top of MySQL, and Wormhole, a publish-subscribe system.
![Large-Scale Low-Latency Storage for the Social Network - Data@Scale](https://cdn-ak-scissors.b.st-hatena.com/image/square/44eb268d957968c797873faf878c13db75d2a2d9/height=288;version=1;width=512/https%3A%2F%2Fi.ytimg.com%2Fvi%2F5RfFhMwRAic%2Fhqdefault.jpg)