Co-authors: Vivek Nelamangala and PJ Xiao Introduction to Notifications Social media are computer-mediated platforms that facilitate creation and sharing of information, ideas, career interests, and other forms of expression via virtual communities and networks. In the last few years, notifications have been proven to be the mainstay for surfacing social media’s...

Co-authors: Vivek Nelamangala and Val Markovic Editor’s note: In Part 1 of this series, we talked about how we built the Activity Graph and how we use it to deliver features to Activity searcher machines. In this post, we’ll talk about how we store this data for efficient storage and retrieval. Quick background on FollowFeed FollowFeed is the main Activity...