amazon-web-services - 可用性 SLA 与为可用性而设计

Question

我正在尝试找出 Amazon S3 的可用性百分比。链接如下。

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

可用性 SLA 和为可用性而设计之间有什么区别？

Answer 1

您似乎有点困惑，让我尝试从 AWS 文档中用更简单的术语解释一下:

可用性 SLA 和为可用性而设计？

简单的英语翻译是I can design X service to be available for X Percentage，也就是说只是说我已经设计好了这样!

可用性 SLA 是您可以想到的在法律上约束他们的契约(Contract)来服务它，因此术语定义它是绝对的。

它专为 99.999999999% 的物体的耐用性而设计。 - 这只是意味着存储在 s3 中的对象的持久性机会就是上面提到的。

现在，

专为在给定年份实现 99.99% 的可用性而设计。 - 现在这就是他们所说的 s3 作为您使用的服务将可用并且 S3 的可用性由 Amazon S3 服务级别协议(protocol)支持可用性。

根据 Amazon S3 Service Level Agreement for availability. 什么是 S3 服务 promise :

AWS will use commercially reasonable efforts to make Amazon S3 available with the applicable Monthly Uptime Percentage (as defined below) during any monthly billing cycle (the “Service Commitment”). In the event Amazon S3 does not meet the Service Commitment, you will be eligible to receive a Service Credit.

Definitions:

• “Error Rate” means: (i) the total number of internal server errors returned by Amazon S3 as error status “InternalError” or “ServiceUnavailable” divided by (ii) the total number of requests for the applicable request type during that five minute period. We will calculate the Error Rate for each Amazon S3 account as a percentage for each five minute period in the monthly billing cycle. The calculation of the number of internal server errors will not include errors that arise directly or indirectly as a result of any of the Amazon S3 SLA Exclusions (as defined below).
• “Monthly Uptime Percentage” is calculated by subtracting from 100% the average of the Error Rates from each five minute period in the monthly billing cycle.
• A “Service Credit” is a dollar credit, calculated as set forth below, that we may credit back to an eligible Amazon S3 account.

Hope this clears your doubt.