How Facebook’s cold storage preserves your old photos
Facebook has done a whole lot of work in order to keep your oldest and least popular photos neatly tucked away and ready to be served up whenever people want to look at them. Today Facebook is opening up about many of the ideas its infrastructure team has implemented in the two cold storage facilities it maintains at its data centers in Oregon and North Carolina. People share 2 billion photos on Facebook’s services every day, so Facebook needs to store them efficiently. And Facebook has made improvements on hardware and software to deal with that scale.