AWS - SNS and SQS
You need to process financial transactions where order and exactly-once processing are critical. Which AWS SQS queue type should you choose and why?
You need to process financial transactions where order and exactly-once processing are critical. Which AWS SQS queue type should you choose and why?
hard📝 Best Practice Q15 of 15
Step-by-Step Solution
Solution:
Step 1: Identify requirements
Financial transactions need strict order and no duplicates (exactly-once).Step 2: Match queue features to requirements
FIFO queues guarantee message order and exactly-once processing, unlike standard queues.Step 3: Evaluate incorrect options
Standard queues do not guarantee order or exactly-once delivery; FIFO queues have throughput limits but meet requirements.Final Answer:
FIFO queue, because it guarantees order and exactly-once delivery -> Option AQuick Check:
Order + exactly-once = FIFO queue [OK]
Quick Trick: Use FIFO for order and no duplicates in critical tasks [OK]
Common Mistakes:
- Choosing standard queue for ordered processing
- Assuming standard queue removes duplicates
- Believing FIFO supports unlimited throughput
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