Glossary term
What is C10K (10,000 concurrent connections)?
C10K stands for 10,000 concurrent connections.
The classic challenge of handling many simultaneous connections. Example: Solved by event loops and non-blocking I/O.
Learn it properly · System DesignLesson 4: Processes, Threads & Concurrency for Backend EngineersMost backend work is waiting. How one server juggles thousands of requests — processes, threads, event loops and lightweight threads — and the race conditions, deadlocks and pool limits that appear the moment it does.