Q42 — AWS DEA-C01 Ch.1

Question 42 of 100 | ← Chapter 1

A company stores data from an application in an Amazon DynamoDB table that operates in provisioned capacity mode. The workloads of the Application have predictable throughput load on a regular schedule. Every Monday, there is an immediate increase in activity early in the Morning. The application has very low usage during weekends. The company must ensure that the application performs consistently during peak usage times. Which solution will meet these requirements in the MOST cost-effective way?

• A. Increase the provisioned capacity to the maximum capacity that is currently present during peak load times.
• B. Divide the table into two tables. Provision each table with half of the provisioned capacity of the original table. Spread queries evenly Across both tables.
• C. Use AWS Application Auto Scaling to schedule higher provisioned capacity for peak usage times. Schedule lower capacity during offpeak Times. ✓
• D. Change the capacity mode from provisioned to on-demand. Configure the table to scale up and scale down based on the load on the table.

Correct Answer: C. Use AWS Application Auto Scaling to schedule higher provisioned capacity for peak usage times. Schedule lower capacity during offpeak Times.

Explanation

答案C是最经济有效的解决方案。因为题目中提到应用的工作负载在周一早上有可预测的即时增加，周末使用量很低。选项A直接将预配置容量增加到峰值负载时的最大容量，会在非高峰时段造成资源浪费和成本增加。选项B把表分成两个表并分别配置容量，操作复杂且不一定能有效节省成本。选项D从预配置模式更改为按需模式，可能会导致成本不可控。而选项C使用AWS应用程序自动缩放，能够根据需求在高峰时段安排更高的预配置容量，在非高峰时段安排较低的容量，从而实现最经济有效的资源利用，满足要求。