How can Reserved Capacity be effectively combined with auto-scaling to optimize costs for a DynamoDB table with variable traffic?

hard🚀 Application Q9 of 15

DynamoDB - Cost Optimization and Monitoring

ARely solely on auto-scaling and avoid Reserved Capacity to reduce upfront costs

BUse only Reserved Capacity and disable auto-scaling to avoid conflicts

CPurchase Reserved Capacity for baseline throughput and enable auto-scaling for spikes

DPurchase Reserved Capacity equal to peak traffic and disable auto-scaling

Step-by-Step Solution

Solution:

Step 1: Understand Reserved Capacity role
Reserved Capacity covers steady baseline throughput at a discounted rate.
Step 2: Understand auto-scaling role
Auto-scaling adjusts capacity dynamically to handle traffic spikes.
Step 3: Combine both
Use Reserved Capacity for predictable load and auto-scaling for unpredictable spikes to optimize cost and performance.
Final Answer:
Purchase Reserved Capacity for baseline throughput and enable auto-scaling for spikes -> Option C
Quick Check:
Baseline with Reserved Capacity plus auto-scaling for spikes is cost-effective. [OK]

Quick Trick: Baseline with Reserved Capacity, spikes with auto-scaling [OK]

Common Mistakes:

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