Amazon EC2 Vs Lambda | Overview.

Amazon EC2 Vs AWS Lambda - Overview.

Scope:

• Intro,
• Quick Summary table,
• When to Use Amazon EC2,
• When to Use AWS Lambda,
• Cost Comparison (Simplified),
• Sample Scenario.

Intro:

• Here’s twtech  comparison between Amazon EC2 and AWS Lambda. 
• Focusing on their use cases, differences, and when to use one over the other.

 Quick Summary table:

Feature	Amazon EC2	AWS Lambda
Type.	Virtual Machine (IaaS)	Serverless Function (FaaS)
Provisioning.	twtech manages instances	Fully managed by AWS
Scalability.	Manual or auto scaling	Automatically scales
Pricing Model.	Pay for uptime (by the second/minute)	Pay per request and execution time
Startup Time.	Slower (seconds to minutes)	Very fast (milliseconds)
Best for.	Long-running apps, custom OS/runtime	Short tasks, event-driven workloads
Max Execution Time.	Unlimited	15 minutes max per execution
State Management.	Can maintain state	Stateless (must store state externally)
Use Case Examples.	Web servers, databases, containers	Image resize, API backend, cron jobs

 When to Use Amazon EC2:

• twtech needs full control over the OS, runtime, and storage.
• twtech is running legacy applications that can’t be easily split into functions.
• twtech workload requires long-running processes (e.g., web servers, game servers).
• twtech is deploying containers using ECS or Kubernetes on EC2.
• twtech needs to install custom software or drivers.

When to Use AWS Lambda:

• twtech application is event-driven (e.g., S3 upload → trigger code).
• twtech wants to reduce operational overhead (no server management).
• twtech has short, lightweight, stateless tasks.
• twtech is building APIs (using Lambda + API Gateway).
• twtech wants automatic, cost-efficient scaling (only pay for usage).

 Cost Comparison (Simplified):

Workload Type	Better Option
Always-on service.	EC2 (predictable cost)
Occasional tasks.	Lambda (pay-per-use)
Bursty traffic.	Lambda (auto-scales)

Sample Scenario:

•  Hosting a web app:
• Simple backend (low traffic) → Lambda
• High traffic or complex server config → EC2
•  Image processing after S3 upload:
• Use Lambda for real-time, event-driven execution.