SAA-C03 Q517 · Serverless

Question

A solutions architect is creating a data processing job that runs once daily and can take up to 2 hours to complete. If the job is interrupted, it has to restart from the beginning. How should the solutions architect address this issue in the MOST cost-effective manner?

Accepted Answer

**Option C: ECS Fargate task triggered by EventBridge scheduled event** is the most cost-effective solution for several reasons:

1. **Supports 2-hour runtime**: Fargate tasks can run for hours without any timeout limitations relevant here (unlike Lambda's 15-minute max).

2. **Pay-per-use pricing**: Fargate charges only for the vCPU and memory consumed **while the task is running**. For a job that runs 2 hours/day, you pay for only ~2 hours of compute per day — not 24 hours.

3. **No infrastructure management**: Fargate is serverless — no EC2 instances to provision, patch, or manage. The task spins up, runs the job, and shuts down automatically.

4. **EventBridge integration**: Amazon EventBridge (formerly CloudWatch Events) can trigger ECS tasks on a cron schedule, perfectly matching the

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📘 Key Concepts

🏗️ Architecture

⚙️ Operations

💰 Cost

🔒 Security

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