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What Are Microservices?
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- Highly maintainable - Easy to update and test
- Loosely coupled - Independent deployment
- Business-focused - Organized around capabilities
- Team ownership - Small, autonomous teams
Benefits of Microservices
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Independent Deployability
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- Faster release cycles
- Lower risk deployments
- Continuous delivery practices
- Targeted scaling capabilities
Technical Freedom
Each service can use appropriate technology:
Customer Service: Java + Spring Boot
Product Catalog: Node.js + MongoDB
Analytics Service: Python + Redis
Implementation Challenges
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Distributed System Complexity
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- Network latency issues
- Message serialization overhead
- Partial failure handling
- Distributed transaction management
Data Management
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- Data consistency challenges
- Cross-service queries complexity
- Event-driven patterns necessity
- Distributed transaction coordination
Service Discovery Pattern
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┌────────────┐
│ Service │
│ Registry │
└────────────┘
▲
│ register
┌────────────┐ find ┌────────────┐
│ Service A │◄──────────►│ Service B │
└────────────┘ └────────────┘
API Gateway Implementation
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- Single entry point for clients
- Authentication and authorization
- Request routing and aggregation
- Rate limiting implementation
"Lorem ipsum dolor sit amet, consectetur adipiscing elit. Microservices should serve business needs, not be an end goal."
— Architecture Principles
Migration Strategies
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Strangler Fig Pattern
- Identify capability to extract
- Build microservice for capability
- Route requests to new service
- Remove from monolith when stable