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【SAA-C03助理级解决方案架构师认证】
A company runs a production application on a fleet of Amazon EC2 instances. The application reads the data from an Amazon SQS queue and processes the messages in parallel. The message volume is unpredictable and often has intermittent traffic.This application should continually process messages without any downtime Which solution meets these requirements MOST cost- effectively?
A : Use Spot Instances exclusively to handle the maximum capacity required
B : Use Reserved Instances exclusively to handle the maximum capacity required
C: Use Reserved Instances for the baseline capacity and use Spot InstaKes to handle
additional capacity
D: Use Reserved instances for the baseline capacity and use On-Demand Instances to handle additional capacity
正确答案 C
题目解析:
The application is decoupledif the spot instance is terminated,the task(item in the queue) is not lost, hence,the application should still work fine The messages will still be processed by Reserved Instances even there is no available spot instance.It may take longer to process but no message will be lost.