How can you ensure cache consistency when multiple clients update the same DynamoDB item behind a DAX cluster?

hard🚀 Application Q9 of 15

DynamoDB - Cost Optimization and Monitoring

ADisable DAX caching for that item only

BUse write-through caching and invalidate cache on updates

CIncrease cache TTL to delay cache refresh

DUse DAX only for write operations

Step-by-Step Solution

Solution:

Step 1: Understand cache consistency needs
Write-through caching with cache invalidation ensures updated data is fresh in cache.
Step 2: Review other options
Disabling cache or increasing TTL causes stale data; DAX does not cache writes only.
Final Answer:
Use write-through caching and invalidate cache on updates -> Option B
Quick Check:
Cache invalidation on writes ensures consistency [OK]

Quick Trick: Invalidate cache on writes to keep data consistent [OK]

Common Mistakes:

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