SAP-C02 学习助手

SAP-C02 第 341 题

Lambda RDS Aurora ECS Fargate

题目

A company needs to optimize the cost of its application on AWS. The application uses AWS Lambda functions and Amazon Elastic Container Service (Amazon ECS) containers that run on AWS Fargate. The application is write-heavy and stores data in an Amazon Aurora MySQL database. The load on the application is not consistent. The application experiences long periods of no usage, followed by sudden and significant increases and decreases in traffic. The database runs on a memory optimized DB instance that cannot handle the load. A solutions architect must design a solution that can scale to handle the changes in traffic. Which solution will meet these requirements MOST cost-effectively?

中文翻译:
一家公司需要优化其在 AWS 上的应用程序的成本。该应用程序使用 AWS Lambda 函数和在 AWS Fargate 上运行的 Amazon Elastic Container Service (Amazon ECS) 容器。该应用程序写入量大,并将数据存储在 Amazon Aurora MySQL 数据库中。应用程序的负载不一致。该应用程序经历了长时间未使用,然后流量突然显着增加和减少。数据库在无法处理负载的内存优化数据库实例上运行。解决方案架构师必须设计一个可以扩展以处理流量变化的解决方案。哪种解决方案能够最具成本效益地满足这些要求?

选项

A. Add additional read replicas to the database. Purchase Instance Savings Plans and RDS Reserved Instances.

中文翻译:
将额外的只读副本添加到数据库。购买实例节省计划和 RDS 预留实例。

B. Migrate the database to an Aurora DB cluster that has multiple writer instances. Purchase Instance Savings Plans.

中文翻译:
将数据库迁移到具有多个写入器实例的 Aurora 数据库集群。购买实例节省计划。

C. Migrate the database to an Aurora global database. Purchase Compute Savings Plans and RDS Reserved instances.

中文翻译:
将数据库迁移到 Aurora 全局数据库。购买计算节省计划和 RDS 预留实例。

D. Migrate the database to Aurora Serverless v1. Purchase Compute Savings Plans.

中文翻译:
将数据库迁移到 Aurora Serverless v1。购买计算节省计划。

答案

D

解析

正确答案:D 解析: 本题应选择 D。 正确选项: D. 将数据库迁移到 Aurora Serverless v1。购买计算节省计划。 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、RDS、Aurora、ECS、Fargate。 排除思路: A、B、C ...

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