Corvus is a fast and lightweight redis cluster proxy for redis 3.0 with cluster mode enabled.Most redis client implementations don't support redis cluster. We have a lot of services relying on redis, which are written in Python, Java, Go, Nodejs etc. It's hard to provide redis client libraries for multiple languages without breaking compatibilities. We used twemproxy before, but it relies on sentinel for high availabity, it also requires restarting to add or remove backend redis instances, which causes service interruption. And twemproxy is single threaded, we have to deploy multiple twemproxy instances for large number of clients, which causes the sa headaches.