Facebook has built a prototype system for storing petabytes on Blu-ray
At last year’s Open Compute Summit, Facebook VP of Engineering Jay Parikh suggested the company might consider Blu-ray discs as a medium for improving durability and cutting costs for its long-term cold storage efforts. Now, Parikh said Tuesday during a keynote at this year’s event, the company is actually doing it. Facebook has built a prototype Blu-ray system capable of storing 10,000 discs and 1 petabyte of data in a single cabinet, with plans to scale it to 5 petabytes per cabinet. Blu-ray storage would save the company 50 percent in costs and 80 percent in energy usage over its existing hard-disk-based cold storage methods, Parikh said, and will provide 50 years worth of durability for data stored on the discs.