SAP-C02 学习助手

SAP-C02 第 263 题

EC2

题目

A solutions architect needs to review the design of an Amazon EMR cluster that is using the EMR File System (EMRFS). The cluster performs tasks that are critical to business needs. The cluster is running Amazon EC2 On-Demand Instances at all times for all task, primary, and core nodes. The EMR tasks run each morning, starting at 1:00 AM. and take 6 hours to finish running. The amount of time to complete the processing is not a priority because the data is not referenced until late in the day. The solutions architect must review the architecture and suggest a solution to minimize the compute costs. Which solution should the solutions architect recommend to meet these requirements?

中文翻译:
解决方案架构师需要检查使用 EMR 文件系统 (EMRFS) 的 Amazon EMR 集群的设计。集群执行对业务需求至关重要的任务。该集群始终为所有任务、主节点和核心节点运行 Amazon EC2 按需实例。 EMR 任务每天早上从凌晨 1:00 开始运行。并需要6个小时才能完成运行。完成处理的时间量不是优先考虑的问题,因为直到当天晚些时候才会引用数据。解决方案架构师必须审查架构并提出解决方案以最大限度地降低计算成本。解决方案架构师应该推荐哪种解决方案来满足这些要求?

选项

A. Launch all task, primary, and core nodes on Spot Instances in an instance fleet. Terminate the cluster, including all instances, when the processing is completed.

中文翻译:
启动实例队列中 Spot 实例上的所有任务、主节点和核心节点。处理完成后,终止集群,包括所有实例。

B. Launch the primary and core nodes on On-Demand Instances. Launch the task nodes on Spot Instances in an instance fleet. Terminate the cluster, including all instances, when the processing is completed. Purchase Compute Savings Plans to cover the On-Demand Instance usage.

中文翻译:
在按需实例上启动主节点和核心节点。在实例队列中的 Spot 实例上启动任务节点。处理完成后,终止集群,包括所有实例。购买计算节省计划来满足按需实例的使用。

C. Continue to launch all nodes on On-Demand Instances. Terminate the cluster, including all instances, when the processing is completed. Purchase Compute Savings Plans to cover the On-Demand Instance usage.

中文翻译:
继续启动按需实例上的所有节点。处理完成后,终止集群,包括所有实例。购买计算节省计划来满足按需实例的使用。

D. Launch the primary and core nodes on On-Demand Instances. Launch the task nodes on Spot Instances in an instance fleet. Terminate only the task node instances when the processing is completed. Purchase Compute Savings Plans to cover the On- Demand Instance usage.

中文翻译:
在按需实例上启动主节点和核心节点。在实例队列中的 Spot 实例上启动任务节点。处理完成后仅终止任务节点实例。购买计算节省计划来满足按需实例的使用。

答案

B

解析

正确答案:B 解析: 本题应选择 B。 正确选项: B. 在按需实例上启动主节点和核心节点。在实例队列中的 Spot 实例上启动任务节点。处理完成后,终止集群,包括所有实例。购买计算节省计划来满足按需实例的使用。 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:EC2。...

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