How can Redis be used? There is more to Redis than just caching. Redis can be used in a variety of scenarios as shown in the diagram. 🔹Session We can use Redis to share user session data among different services. 🔹Cache We can use Redis to cache objects or pages, especially for hotspot data. 🔹Distributed lock We can use a Redis string to acquire locks among distributed services. 🔹Counter We can count how many likes or how many reads for articles. 🔹Rate limiter We can apply a rate limiter for certain user IPs. 🔹Global ID generator We can use Redis Int for global ID. 🔹Shopping cart We can use Redis Hash to represent key-value pairs in a shopping cart. 🔹Calculate user retention We can use Bitmap to represent the user login daily and calculate user retention. 🔹Message queue We can use List for a message queue. 🔹Ranking We can use ZSet to sort the articles. Over to you: Have you used Redis for other use cases? What are they? -- Subscribe to our weekly newsletter to get a Free System Design PDF (158 pages): bit.ly/3KCnWXq

@bytebytego Redis pub/sub and streams are underrated and beat equivalent technologies for simplicity and speed

@bytebytego Can we use it for the Notification Service?