AWS - DynamoDB
A startup expects unpredictable traffic spikes and wants to minimize cost during low usage while avoiding throttling during spikes. Which DynamoDB capacity mode should they choose and why?
A startup expects unpredictable traffic spikes and wants to minimize cost during low usage while avoiding throttling during spikes. Which DynamoDB capacity mode should they choose and why?
hard📝 Best Practice Q15 of 15
Step-by-Step Solution
Solution:
Step 1: Understand startup's needs
They want to avoid throttling during spikes and save cost during low usage.Step 2: Compare capacity modes for unpredictable traffic
On-demand mode charges per request and auto scales instantly, ideal for unpredictable spikes.Step 3: Evaluate other options
Provisioned with auto scaling helps but requires setup and may lag; fixed capacity risks throttling or cost waste.Final Answer:
On-demand mode because it charges per request and scales instantly without manual setup. -> Option AQuick Check:
Unpredictable traffic = on-demand mode best [OK]
Quick Trick: Unpredictable spikes? Choose on-demand for auto scaling [OK]
Common Mistakes:
- Choosing fixed provisioned capacity for unpredictable traffic
- Assuming auto scaling is instant and always perfect
- Thinking on-demand has fixed request limits
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