Question 160
A deployed environment still does not meet the original requirement: Large fault-tolerant batch analytics jobs can be interrupted and resumed while the team pays full on-demand prices. Which missing control accounts for the continuing issue?
Explanation
Correct Answer
This is the technical design error aligned with the unmet requirement. Spot Instances optimize interruptible capacity costs when jobs tolerate reclaim events. The appropriate correction is: Use EC2 Spot capacity with checkpointing and interruption-aware retry mechanisms. The control should then be tested by verifying that A simulated interruption causes bounded rework and lowers total compute cost without losing final results.
Incorrect Answers
Fixed hot storage is retained for every object because teams cannot forecast access patterns. The stated evidence instead indicates: The workload uses only on-demand capacity despite safe restart or checkpoint semantics.
Fixed EC2 capacity is provisioned 24/7 despite infrequent invocation. The stated evidence instead indicates: The workload uses only on-demand capacity despite safe restart or checkpoint semantics.
DNS simple routing cannot automatically reflect the application's health. The stated evidence instead indicates: The workload uses only on-demand capacity despite safe restart or checkpoint semantics.