Serverless Architecture

 Serverless architecture is a cloud computing model where developers can build and run applications without managing the underlying infrastructure. Instead of provisioning and maintaining servers, developers rely on cloud providers (such as AWS, Azure, or Google Cloud) to automatically handle resource allocation, scaling, and maintenance.

Key Features of Serverless Architecture

  1. No Server Management – The cloud provider manages the infrastructure, including provisioning, scaling, and maintenance.
  2. Automatic Scaling – The application scales up or down based on demand, optimizing performance and cost.
  3. Pay-as-You-Go Pricing – Users are charged only for the actual execution time and resources consumed, rather than paying for idle servers.
  4. Event-Driven Execution – Serverless functions (e.g., AWS Lambda, Azure Functions) are triggered by events such as HTTP requests, database updates, or file uploads.
  5. Faster Development – Developers focus on writing code rather than managing infrastructure, accelerating deployment.

Common Serverless Services

  • Compute – AWS Lambda, Azure Functions, Google Cloud Functions
  • Databases – AWS DynamoDB, Firebase Firestore
  • Storage – AWS S3, Azure Blob Storage
  • Messaging & Event Processing – AWS SQS, AWS EventBridge

Advantages of Serverless Architecture

✔️ Reduces operational complexity
✔️ Lowers infrastructure costs
✔️ Improves scalability and flexibility
✔️ Faster development and deployment

Disadvantages

❌ Cold start latency (delay when functions are inactive)
❌ Limited execution time for serverless functions
❌ Vendor lock-in (dependent on a specific cloud provider)

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