---
unique_id: https://web.facebook.com/joyatrestech|A universal request flow and blueprint for system design consists of: Client -> DNS -> CDN -> Load B
page_url: https://web.facebook.com/joyatrestech
post_date: N/A
resource_link: N/A
created_at: 2026-07-16T10:48:11.797+00:00
---

# Facebook Post - N/A

## Content
A universal request flow and blueprint for system design consists of: Client -> DNS -> CDN -> Load Balancer -> API Gateway -> Application Servers -> Cache -> Database (Primary + Replicas) -> Message Queue -> Workers -> Object Storage / Search.

Key components and their roles:
- Client: Initiates requests.
- DNS: Maps domain names to servers.
- CDN: Delivers static assets from edge locations to minimize latency.
- Load Balancer: Distributes traffic across servers for scalability and high availability.
- API Gateway: Manages authentication, routing, and rate limiting.
- Application Servers: Execute stateless business logic.
- Redis Cache: Provides frequently accessed data with low latency while alleviating database load.
- Database + Read Replicas: Stores persistent data and scales read traffic.
- Message Queue: Decouples services and facilitates asynchronous processing.
- Workers: Handle background tasks.
- Object Storage (S3): Stores files, images, videos, and large objects.
- Search Engine: Enables fast full-text search and filtering.
- Monitoring & Logging: Offers insights into system health, performance, and failures.

A straightforward approach to building scalable systems step-by-step:
1. Begin with the core request flow: Client -> Application -> Database.
2. Incorporate a cache to enhance frequent reads.
3. Add read replicas as read traffic increases.
4. Introduce a message queue for long-running or asynchronous tasks.
5. Utilize object storage and a CDN for media delivery.
6. Implement a search engine for quick discovery.
7. Ensure everything is wrapped with monitoring, logging, and observability.

## References
- **Original Post:** [https://web.facebook.com/joyatrestech](https://web.facebook.com/joyatrestech)
- **Resource Link:** [N/A](N/A)