SAP-C02 第 105 题
题目
A finance company is running its business-critical application on current-generation Linux EC2 instances. The application includes a self-managed MySQL database performing heavy I/O operations. The application is working fine to handle a moderate amount of traffic during the month. However, it slows down during the final three days of each month due to month-end reporting, even though the company is using Elastic Load Balancers and Auto Scaling within its infrastructure to meet the increased demand. Which of the following actions would allow the database to handle the month-end load with the LEAST impact on performance?
中文翻译：
一家金融公司正在当前一代 Linux EC2 实例上运行其关键业务应用程序。该应用程序包括一个自我管理的 MySQL 数据库，执行大量 I/O 操作。该应用程序运行良好，可以处理该月的中等流量。然而，尽管该公司在其基础设施中使用弹性负载均衡器和自动扩展来满足不断增长的需求，但由于月末报告，它在每个月的最后三天会放缓。以下哪项操作可以让数据库处理月末负载，同时对性能的影响最小？
选项
A. Pre-warming Elastic Load Balancers, using a bigger instance type, changing all Amazon EBS volumes to GP2 volumes.
中文翻译：
预热弹性负载均衡器，使用更大的实例类型，将所有 Amazon EBS 卷更改为 GP2 卷。
B. Performing a one-time migration of the database cluster to Amazon RDS, and creating several additional read replicas to handle the load during end of month.
中文翻译：
将数据库集群一次性迁移到 Amazon RDS，并创建多个额外的只读副本来处理月底的负载。
C. Using Amazon CloudWatch with AWS Lambda to change the type, size, or IOPS of Amazon EBS volumes in the cluster based on a specific CloudWatch metric.
中文翻译：
将 Amazon CloudWatch 与 AWS Lambda 结合使用，根据特定的 CloudWatch 指标更改集群中 Amazon EBS 卷的类型、大小或 IOPS。
D. Replacing all existing Amazon EBS volumes with new PIOPS volumes that have the maximum available storage size and I/O per second by taking snapshots before the end of the month and reverting back afterwards.
中文翻译：
通过在月底之前拍摄快照并在月底恢复回来，将所有现有 Amazon EBS 卷替换为具有最大可用存储大小和每秒 I/O 的新 PIOPS 卷。
答案
B
解析
正确答案：B 解析： 本题应选择 B。 正确选项： B. 将数据库集群一次性迁移到 Amazon RDS，并创建多个额外的只读副本来处理月底的负载。 选择理由： 该选项最直接地满足题干中的关键约束。做 SAP-C02 题目时，需要同时对照题干里的限定词，例如最高性能、最低运维开销、成本效益、可靠性、可扩展性、安全性、RTO/RPO、合规要求等。本题相关考点主要包括：Lambda、EC2、EBS、RDS、CloudWatch、Auto S...