This is a simple recommendation engine written in Go using Redis. The Redis client Go library used is Redigo.

Rate an item:

redis-recommend rate <user> <item> <score>  

Find (n) similar users for all users:

redis-recommend batch-update [--results=<n>]

Get (n) suggested items for a user:

redis-recommend suggest <user> [--results=<n>]

Get the probable score a user would give to an item:

redis-recommend get-probability <user> <item>