Hmm. The author's recommendation to use Redis' 'KEYS' command to pattern match keys for invalidation is a dangerous one. 'KEYS' runs in O(n) time. If you're using Redis in a serious production environment, you do not want want to be using an O(n) command each time you need to invalidate a group of keys. It's better to group related items in a Redis hash table, and that way they are all stored under one common key.

Honestly, I think this article is a more impoverished version of antirez's post on the same topic [1]. antirez, being one of the principal authors of Redis, is a much more authoritative source, and he actually describes all the patterns that this author described in greater detail.

[1] http://antirez.com/post/take-advantage-of-redis-adding-it-to...