System Design Patterns and Components

17 January 2025 - less than 1 min read time
Tags: Design Patterns Architecture Microservices

System Design Patterns and Components

API Gateway Pattern

1. Core Functions

• Request Routing
• Authentication
• Rate Limiting
• Response Transformation

2. Implementation

• Gateway Selection
• Configuration
• Monitoring
• Security

3. Benefits

• Single Entry Point
• Security Control
• Traffic Management
• Protocol Translation

Caching Strategies

1. Cache Types

• Browser Cache
• CDN Cache
• Application Cache
• Database Cache

2. Caching Patterns

• Cache-Aside
• Write-Through
• Write-Behind
• Read-Through

3. Implementation

• Cache Selection
• Invalidation Strategy
• Consistency Management
• Performance Optimization

Load Balancing

1. Algorithms

• Round Robin
• Least Connection
• IP Hash
• Weighted Round Robin

2. Implementation

• Hardware vs Software
• Health Checks
• Session Persistence
• SSL Termination

3. Scaling

• Geographic Distribution
• Auto-scaling
• Failover
• High Availability

Messaging Systems

1. Message Patterns

• Point-to-Point
• Publish-Subscribe
• Request-Reply
• Event-Driven

2. Components

• Message Brokers
• Queues
• Topics
• Dead Letter Queues

3. Implementation

• Message Format
• Delivery Guarantees
• Error Handling
• Monitoring

Communication Protocols

1. REST

• HTTP Methods
• Resource Design
• Status Codes
• Authentication

2. GraphQL

• Schema Design
• Resolvers
• Types
• Operations

3. gRPC

• Protocol Buffers
• Service Definition
• Streaming
• Error Handling

Design Characteristics

1. Scalability

• Horizontal Scaling
• Vertical Scaling
• Database Sharding
• Caching Layers

2. Reliability

• Fault Tolerance
• Data Replication
• Backup Systems
• Monitoring

3. Security

• Authentication
• Authorization
• Encryption
• Compliance

4. Performance

• Response Time
• Throughput
• Resource Usage
• Optimization