Redis 4.x Cookbook

There's more...

More examples can be listed, such as counting the unique visitors to your website; you can use set, bitmaps, or HyperLogLog to achieve your goal. You have to choose the correct data types. The more familiar you are with the Redis data types, the more ways you will find to implement your application.

Apart from the memory consumption concern, you should pay attention to the performance of manipulating the data type you choose. A space-time tradeoff must be considered all the time. Be cautious not to overdesign the memory optimization. For the performance concerns of an application design with Redis, the next recipe will give you some useful tips.