What exactly is redis

Redis, data structure server

Redis (Remote Dictionary Server) is a high-performance memory-based key-value storage system that is often used as a database, cache, and message broker.

Features:

• High performance: Since data is stored in memory, Redis provides extremely fast read and write speeds.
• Rich support: Redis supports a variety of data structures, including strings, lists, hashes, sets, and ordered sets.
• Distributed: Redis can be configured in cluster mode to provide high availability and scalability.
• Persistence: Redis supports persisting data to disk to prevent data loss.
• Replication: Redis can create master-slave copies to improve data redundancy and availability.
• Multiple language support: Redis provides a variety of client libraries and supports multiple programming languages.

Application scenarios:

• Cache: Redis can be used to cache database query results or other frequently accessed data to Reduce database load and improve response time.
• Message Queue: Redis can be used to implement message queues for asynchronous communication and distributed systems.
• Session Management: Redis can be used to store user session data to implement stateless web applications.
• Ranking list: Redis ordered collection can be used to implement functions such as ranking list.
• Rate limit: Redis can be used to limit the frequency of user calls to specific operations.

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