Setting up Redis

Redis is an open source, BSD licensed, networked, in-memory, key-value data store with optional durability. It is often referred to as a data structure server since keys can contain strings, hashes, lists, sets and sorted sets.
RTwUP adopts Redis as a fast and stable Publish/Subscribe messaging system; in order to run RTwUP you need to install the mentioned data store in your computer. You can find the official quickstart quite useful.