Facebook's hyperscale data centers globally host hundreds of thousands of Open Compute Servers. Tens of thousands of them operate in each data hall at the Forest City, N.C. campus.
Hyperscale operations are not massive replicas of enterprise data centers, with a heterogeneous mix of server brands, hundreds of applications and a large staff to implement change and monitor the system. The average Facebook sysadmin handles 20,000 servers, thanks to standardization, automation and a failure-tolerant IT infrastructure.
Check out these photos from inside Facebook's data halls, looking at Open Compute servers and storage, cooling systems that Facebook designed, and more.