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Why does enabling PITR on a DynamoDB table increase costs?

hard🧠 Conceptual Q10 of 15
DynamoDB - Backup and Recovery
Why does enabling PITR on a DynamoDB table increase costs?
ABecause DynamoDB continuously backs up data changes for 35 days
BBecause PITR requires additional read capacity units
CBecause PITR encrypts data with a more expensive key
DBecause PITR duplicates the table data in another region
Step-by-Step Solution
Solution:

  1. Step 1: Understand PITR cost factors

    PITR continuously backs up data changes to enable point-in-time restores, which incurs storage costs.

  2. Step 2: Evaluate other options

    PITR does not increase read capacity, change encryption costs, or replicate data to another region.

  3. Final Answer:

    Because DynamoDB continuously backs up data changes for 35 days -> Option A

  4. Quick Check:

    PITR cost cause = Continuous backup storage [OK]
Quick Trick: PITR costs come from storing continuous backups [OK]
Common Mistakes:
MISTAKES
  • Assuming read capacity increases
  • Confusing encryption costs
  • Thinking PITR replicates data cross-region

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