Redis (Remote Dictionary Server) is a fast database used for in-memory caching to reduce server load by reducing disk and/or network read and write operations.
Uses of Redis are:
Caching frequently accessed data to improve access time.
Session storage for web applications
Real-time analytics and leader boards.
Managing queues or task lists in background job systems.
How Redis Work?
Redis acts as a caching layer between the database and the client to speed up data access and reduce the load on the main database. When a client asks for data, the API Gateway forwards the request to Redis.
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| Working of Redis |
If Redis has the data (cache hit), it returns it quickly through the API Gateway to the client. If the data is missing (cache miss), Redis retrieves it from the database, stores it in the cache for future requests, and then passes it back through the API Gateway to the client. This flow speeds up response times and reduces the database load.
Source : https://www.geeksforgeeks.org/system-design/introduction-to-redis-server/
