Can you explain what Redis is and what it is used for?

Redis is a high-performance in-memory open-source database that stores data in RAM for fast access. It supports various data structures: strings, lists, sets, hashes, and more.

Main uses of Redis:

• Caching data to speed up access and reduce load on the primary database.
• Storing user sessions in web applications.
• Implementing queues and publish-subscribe systems.
• Supporting counters and real-time rankings.

Redis is often used in DevOps to enhance application performance and scalability.