amazon-web-services - AWS S3 : IA vs One-Zone IA Storage Classes

Question

亚马逊于 2018 年 4 月宣布推出一种名为 One-Zone Infrequent Access 的新存储类，它通过仅使用一个可用区进行存储来降低成本，从而补充了普通 IA 选项。

它的 site , 广告说 全部 存储类具有所谓的 11 9s 持久性。

我的问题是两个选项(IA vs One Zone IA)如何具有相同(即 11 9s)的耐用性，因为后者使用 1 AZ(与前者的倍数相比)

Amazon S3 Standard, S3 Standard-IA, S3 One Zone-IA, and Amazon Glacier, are all designed for 99.999999999% durability. Amazon S3 Standard, S3 Standard-IA and Amazon Glacier distribute data across a minimum of three geographically-separated Availability Zones to offer the highest level of resilience to AZ loss. S3 One Zone-IA saves cost by storing infrequently accessed data with lower resilience in a single Availability Zone. Amazon S3 Standard-IA is a good choice for long-term storage of master data that is infrequently accessed. For other infrequently accessed data, such as duplicates of backups or data summaries that can be regenerated, S3 One Zone-IA provides a lower price point

附:我认为他们自己在暗示一个区域的耐用性较低。

One Zone-IA saves cost by storing infrequently accessed data with lower resilience in a single Availability Zone

Answer 1

从工程角度来看，S3 One Zone IA 与其他存储类一样持久，除非存储数据的可用区被破坏。

S3 One Zone-IA offers the same high durability†, high throughput, and low latency of Amazon S3 Standard and S3 Standard-IA

...

† Because S3 One Zone-IA stores data in a single AWS Availability Zone, data stored in this storage class will be lost in the event of Availability Zone destruction.

https://aws.amazon.com/s3/storage-classes/

因此，所提出的声明似乎是 1ZIA 使用与其他存储类相同的工程设计——冗余存储介质——除了一切都在物理上位于单个可用区中，而不是分布在多个区域中......因此它提供了可比性耐用性...除了涉及该可用区的灾难性事件。