How is Facebook able to quickly process the sort of queries about users and their friends generated by features such as Graph Search, despite the fact that the relevant data may be stored on several different servers? Software Engineers Alessandro Presta and Alon Shalita offered an example of how the social network uses graph-processing system Apache Giraph to handle those tasks in a post on its engineering blog.
The reach achieved by posts from Facebook pages has been the hot topic of late, with reporter Nick Bilton of The New York Times helping to bring the issue to the forefront. But how many of Facebook users’ friends actually see their posts, on average? About one-third, according to a study by the Facebook Data Science Team and the human-computer interaction group at Stanford University’s computer science department.