Tag: proxy

HTTP caching

Posted on by lechuck park

From Claude with some prompting
The image illustrates the architecture of an HTTP caching system with the following main components:

  1. Client Side (Left):
  • Web App client
  • FAST GET requests through PROXY
  • Uses If-Modified-Since and Cache-Control headers
  1. Central Infrastructure:
  • GSLB (Global Server Load Balancer)
  • CDN Service (Content Delivery Network)
  • Edge servers (distributed cache servers)
  1. Server Side (Right):
  • Web Service server
  • FAST RETURN through REVERSE PROXY
  • Uses Last-Modified and Cache-Control headers
  • Supports Load Optimization
  • Origin server connection
  1. Cache Control Options:
  • max-age
  • no-cache
  • no-store
  • must-revalidate
  • public
  • private
  • s-maxage

This architecture represents an enterprise-grade caching system designed to optimize web performance and reduce server load. The system utilizes multiple layers of caching with CDN to deliver content to end users more quickly and efficiently.

Traffic flow starts from the client, passes through multiple caching layers, and can ultimately reach the origin server, with appropriate caching strategies applied at each layer.

This structure enables:

  • Improved response times
  • Reduced server load
  • Efficient content delivery
  • Better user experience
  • Scalable infrastructure

The combination of proxies, CDN, and various caching mechanisms creates a robust system for handling web content delivery at scale.

Web Service [Server Inside]

Posted on by lechuck park

From Claude with some prompting
focusing on the key technical aspects and operational considerations for designing a web service application.

Web Service [Server Inside] – Design and Operational Considerations

  1. Service Architecture Design: a. Multi-tier structure:
    • Gateway → Load Balancer → API Gateway → DB Proxy → Database
    • Each layer focuses on specific functions, improving maintainability and scalability b. Microservice Architecture:
    • Implemented through “Programmatic Control” at the API Gateway
    • Ensures service independence, increases development and deployment flexibility
  2. Scalability Design: a. Auto Scaling:
    • Applied at each layer (Load Balancer, API Gateway, DB Proxy)
    • Automatic resource adjustment based on traffic fluctuations for improved stability b. Resource Pooling:
    • “Protecting SVC” functionality for efficient resource management c. Load Balancing:
    • Gateway provides “Route with Load Balancing (2 More Resources)” functionality
  3. Performance Optimization: a. Static/Dynamic Data Separation:
    • Static Data Control: HTML/CSS/JS/IMAGES
    • Utilization of CDN services or On-Premise storage b. Database Optimization:
    • SQL, NoSQL, Hybrid options available
    • Connection management through DB Proxy for database load distribution
  4. Security Design: a. Multi-layered Security:
    • Authentication (OAuth2, etc.)
    • Encryption (SSL/TLS)
    • Firewall/WAF/IPS/IDS b. Request Limiting:
    • “Limiting Requests (Protect Domain Service)” at Gateway for DDoS protection
  5. Monitoring and Analysis: a. Comprehensive Monitoring:
    • Collection of Network, Server, and Application Metrics b. Analysis and Planning:
    • Maintenance & Scaling
    • Service Design Upgrade
    • Resource & Cost Optimization
  6. Error Handling:
    • Specification of 400, 500 series errors (Network Error, Service Unavailable, Server Internal, etc.)
    • Emphasis on Gateway-related errors (502 Bad Gateway, 504 Gateway Timeout)
  7. Network and Protocol:
    • “Protocol Converting” functionality provided at the Gateway
    • Separate management of Network Domain Control
  8. Operational Efficiency:
    • Automation: Minimized manual intervention through Auto Scaling, resource pooling, etc.
    • Flexibility: Possible combination of On-Premise and CDN services
    • Cost Optimization: Efficient resource usage, continuous analysis and improvement

Key Advantages of This Configuration:

  1. High Availability and Stability: Stable service provision through multiple layers and auto-scaling
  2. Excellent Scalability: Flexible response to traffic fluctuations
  3. Strong Security: Multi-layered security structure to address various threats
  4. Efficient Resource Management: Cost efficiency through automation and optimization
  5. Flexible Service Development and Deployment: Utilization of microservice architecture
  6. Comprehensive Monitoring and Analysis: Enables continuous service improvement

This design incorporates almost all essential elements required for modern, large-scale web services, enabling stable and scalable service operations. It reflects a thorough consideration of both technical and operational aspects, providing a robust foundation for complex web applications.