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In 1999 Dan Kegel issued a big hairy audacious challenge to web servers:
It's time for web servers to handle ten thousand clients simultaneously, don't you think? After all, the web is a big place now.
This became known as the C10K problem. Engineers solved the C10K scalability problems by fixing OS kernels and moving away from threaded servers like Apache to event-driven servers like Nginx and Node.
Today we are considering an even bigger goal, how to support 10 Million Concurrent Connections, which requires even more radical techniques.
No similar challenge was issued for managing servers in a datacenter, but according to Dave Neary from Red Hat, in a recent FLOSS Weekly episode, we have passed the 10K barrier for server management with 10,000 or more servers managed per sysadmin.
Should we let this milestone pass without mention?
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