Redis is single-threaded, then how does it do concurrent I/O?

Redis is single-threaded, then how does it do concurrent I/O?

multithreading redis

multithreading

Redis + ActionController::Live threads not dying

ruby-on-rails multithreading redis ruby-on-rails-4 publish-subscribe

multithreading

Inter-child-process communication options in node.js cluster

multithreading node.js redis zeromq dnode

multithreading

why Redis is single threaded(event driven)

multithreading redis event-driven single-threaded

multithreading

Twisted: why is it that passing a deferred callback to a deferred thread makes the thread blocking all of a sudden?

python multithreading twisted redis

multithreading

Redis Pub/Sub ServiceStack, cancelling the thread

c# multithreading redis servicestack publish-subscribe

multithreading