This document discusses key metrics and challenges around Twitter's massive scale. It notes that Twitter now sees 70 million tweets per day (800 tweets per second), with 8 terabytes of data generated daily. It faces challenges in supporting real-time delivery at this scale across half the world's population, while also enabling complex queries, relevance systems, and analytics on its massive distr
![Twitter by the Numbers](https://cdn-ak-scissors.b.st-hatena.com/image/square/92d23211ab2782cf6b4e5872647231fab1a52c93/height=288;version=1;width=512/https%3A%2F%2Fcdn.slidesharecdn.com%2Fss_thumbnails%2Fby-the-numbers-100911160711-phpapp01-thumbnail.jpg%3Fwidth%3D640%26height%3D640%26fit%3Dbounds)