From The Oregonian:
Facebook knows you might want to see your old photos again someday. Or scroll back through your Timeline to revisit your posts as an online diary. But storing all those pictures – and keeping them immediately available – takes a lot of space.
Not in the physical sense, but in the virtual. That means lots of hard drives, lots of storage – and lots of energy.
So Facebook is preparing to try out a more efficient storage system at its Prineville data center, “cold storage” for those archival posts that people don’t need every day, but that they don’t want to lose altogether.
Facebook says 82 percent of its traffic is focused on just 8 percent of its photos. Its cold storage facility is designed to create a more efficient way to store those photos that aren’t in heavy rotation.
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Hat Tip: The Telegraph