Caching data with Redis

Redis is an extremely fast, open source, in-memory key value store. Redis has a useful Pub/Sub mechanism that we will use to push messages to a Socket.IO subscriber that will emit events to the client.

Visit this website in order to download and install Redis: http://redis.io/download.

Once Redis is installed, you can start it with the following command:

redis-server

In order to start the Redis command-line interface, CLI issues the following command:

redis-cli

The following commands can be issued from the CLI:

• To monitor activity on Redis:

  monitor
  

• To clear the Redis store:

  flushall
  

• To view all the keys stored in Redis:

  keys *
  

• To get the value of a key:

  get <key>
  

In order to use Redis in our application, install the node-redis client, as follows:

npm install redis --save

Let's configure our application to use Redis by updating the./lib/config/*.json config files with the following configuration:

  "redis": {
    "port": 6379
  , "host": "localhost"
  }

First, we...