Q58 — AWS SAA-C03 第3章

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Q188.一家电子商务公司在 AWS 云中托管其分析应用程序.该应用程序每月生成大约 300 MB 的数据.数据以 JSON 格式存储.该公司正在评估用于备份数据的灾难恢复解决方案.如果需要，数据必须在毫秒内可访问，并且数据必须保留 30 天.哪种解决方案能够最经济有效地满足这些要求?

• A. 亚马逊开放搜索服务（Amazon Elasticsearch Service）
• B. 亚马逊 S3 冰川
• C. 亚马逊 S3 标准 ✓
• D. Amazon RDS for PostgreSQL

正确答案: C. 亚马逊 S3 标准

解析

C. Amazon S3 StandardAmazon S3 Standard is the most cost-effective solution for storing data that needs to be accessed quickly and frequently. The analytics data generated by the ecommerce company is only 300 MB per month, which is well within the limits of the S3 Standard storage class. Additionally, S3 Standard provides 99.99% availability and is designed to be highly durable for long-term storage of data. With S3's versioning feature, the company can keep multiple versions of the same data for the same cost as storing a single copy.Amazon OpenSearch Service and Amazon RDS for PostgreSQL are database services and not intended for simple file storage. They are intended for more complex data storage needs and are more expensive to operate than S3 Standard. Amazon S3 Glacier is designed for long-term storage and data archival purposes. While it is a low-cost storage solution, it is not ideal for data that needs to be accessed in milliseconds, as data retrieval times range from minutes to hours. C. Amazon S3标准Amazon S3 Standard是存储需要快速、频繁访问的数据的最具成本效益的解决方案。电子商务公司每月生成的分析数据只有300 MB，这完全在S3标准存储类的限制之内。此外，S3 Standard提供了99.99%的可用性，并且设计用于数据的长期存储。使用S3的版本控制功能，公司可以以与存储单个副本相同的成本保留相同数据的多个版本。Amazon OpenSearch Service和Amazon RDS for PostgreSQL是数据库服务，而不是用于简单的文件存储。它们旨在满足更复杂的数据存储需求，并且比S3 Standard的操作成本更高。Amazon S3 Glacier是为长期存储和数据存档而设计的。虽然它是一种低成本的存储解决方案，但对于需要以毫秒为单位访问的数据来说，它并不理想，因为数据检索时间从几分钟到几小时不等。