Suggest an editImprove this articleRefine the answer for “Why is it important to isolate the database for each microservice?”. Your changes go to moderation before they’re published.Approval requiredContentWhat you’re changing🇺🇸EN🇺🇦UAPreviewTitle (EN)Short answer (EN)Isolated databases are one of the key rules of microservices architecture. Each service must have **its own data store**, not sharing it with others. **Key point:** isolated databases give microservices autonomy, flexibility, and resilience; a shared database destroys context boundaries and turns the system back into a monolith.Shown above the full answer for quick recall.Answer (EN)ImageIsolated databases are one of the key rules of microservices architecture. Each service must have **its own data store**, not sharing it with others. --- ### 1. **Isolation of responsibility** Each microservice is responsible only for its own business function. Its own database makes it **autonomous**: it can change its data structure without breaking other services. --- ### 2. **Deployment independence** If services share a database, any schema change requires coordination and an update across all of them. A separate database lets services be updated and rolled out independently. --- ### 3. **Security and fault tolerance** A failure or overload in one database does not affect others. And access is restricted to only "its own" service, which lowers the risk of data leaks. --- ### 4. **Choosing the right technology** Different services can use different databases: SQL, NoSQL, graph, and so on. Each one chooses what best fits its tasks. --- **Summary:** > Isolated databases give microservices autonomy, flexibility, and resilience. > A shared database destroys context boundaries and turns the system back into a monolith.For the reviewerNote to the moderator (optional)Visible only to the moderator. Helps review go faster.