Cluster Mode

A single Dragonfly instance can achieve the same capacity as a multi node Redis Cluster. In order to help with migrating an application from a Redis Cluster to Dragonfly, Dragonfly can emulate a Redis Cluster.

1. # Running Dragonfly instance in cluster mode
2. $ dragonfly --cluster_mode=emulated
3. $ redis-cli
4. # See which cluster commands are supported
5. 127.0.0.1:6379> cluster help

Now you can connect to your Dragonfly instance with a Redis Cluster client, here’s a python example:

1. >>> import redis
2. >>> r = redis.RedisCluster(host='localhost', port=6379)
3. >>> r.set('foo', 'bar')
4. True
5. >>> r.get('foo')
6. b'bar'

Note that your application code may be using a redis client that does not require cluster commands, in this case you don’t need to specify the --cluster_mode flag.

In case you need to migrate data from Redis Cluster to Dragonfly you may find Redis Riot helpful.