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  1. Common Systems to use in system design

Redis

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Last updated 1 year ago

Redis is commonly used in distributed systems for various purposes, including:

  1. Caching: Redis is often used as a caching layer to store frequently accessed data in memory, reducing the load on backend databases and improving application performance.

  2. Session Management: Redis can store session data for web applications, providing fast access to session information and supporting features like session persistence and expiration.

  3. Pub/Sub Messaging: Redis supports publish/subscribe messaging, allowing distributed components of an application to communicate with each other asynchronously. This is useful for implementing real-time features like chat applications, notifications, and event-driven architectures.

  4. Queueing: Redis can be used as a lightweight message broker for task queueing and background job processing. It supports features like priority queues, delayed execution, and reliable message delivery.

  5. Rate Limiting: Redis can enforce rate limits on incoming requests, helping to prevent abuse and ensure fair resource allocation in distributed systems.

  6. Leaderboards and Counters: Redis's atomic operations make it well-suited for maintaining leaderboards, rankings, and counters in applications where real-time analytics or gamification features are required.

  7. Distributed Locking: Redis offers primitives like SETNX (set if not exists) and EXPIRE to implement distributed locking mechanisms, ensuring mutual exclusion and preventing race conditions in distributed environments.

  8. Geospatial Indexing: Redis supports geospatial indexing, allowing applications to store and query location-based data efficiently. This is useful for implementing features like location-based services, geofencing, and proximity-based recommendations.

  9. Caching of Database Queries: Redis can cache the results of expensive database queries, reducing latency and improving the overall responsiveness of applications.

  10. Distributed Data Structures: Redis provides various data structures like lists, sets, sorted sets, and hashes, which can be distributed across multiple nodes in a cluster. These data structures enable complex operations and can be leveraged to build sophisticated distributed applications.