Jason Sobel the manager of infrastructure engineering at Facebook, gave a presentation at Stanford recently. He explains how Facebook efficiently stores ~6.5 billion images, in 4 or 5 sizes each, totalling 30 billion files, and a total of 540TB and serving 475,000 images per second at peak.
You can look at the presentation here.
If Facebook’s storage is 540TB. How big is Google’s? The mind boggles.
Via Slashdot.