Why is distributed caching used in microservices architecture?

Distributed caching in microservices architecture is used to improve system performance and scalability. It allows multiple microservices to share the same cache, reducing database load and decreasing response time.

Main advantages:

• Shared data access point: All services can quickly access frequently used data.
• Reduction of duplication: No need for each service to maintain its own local cache.
• Scalability: The cache can be distributed across multiple nodes, ensuring fault tolerance.

Example: using Redis or Memcached as a distributed cache, which different microservices access to retrieve user sessions or results of frequent queries.