March 2023
Beginner to intermediate
266 pages
4h 30m
Chinese
Content preview from FinOps云成本优化
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预留和承诺的使用
｜
133
然后，他们必须让技术团队适应预留型的基础设施。云计算的优势在于你能够只使
用需要的资源，并调整基础设施以适应工作负载的运作模式。然而你引入了新的功
能，如无服务器化或容器化，并承诺
(
或威胁
)
在一组新的云服务上完全重构基础
设施。更改基础设施的风险使得团队不愿意在一年或三年的预留期内承诺使用他们
当前的技术栈。这些团队由于对基础设施的巨大改变过度担心而发生了拖延，导致
购买预留多次发生延误。
遗憾的是，这样的故事很常见。当公司实施他们的第一个预留实例时，让所有团队
都参与进来可能需要很长时间，而失去的成本节省可能会累积数百万美元。如果这
家零售商在这
9
个月的时间里在了解业务的同时购买了一些预留实例，那么他们就
可以节省大量资金，避免数百万不必要的支出。
预留和承诺的使用
虽然每家云服务提供商提供的服务条款各不相同，但三大云服务提供商都提供了同样简
单的能力，即在一段时间内承诺使用特定的资源。你的承诺保证了云服务提供商的持续
收入，作为回报，他们会为你的使用率
(
费率优化
)
提供较高的折扣当作奖励。这些折
扣相当可观，在某些情况下甚至高达
75%
。
在这三个主要的云服务提供商中，你实际上并不真的预留某个特定的服务器实例或保证
拥有特定的资源。请记住，你已经抛弃了数据中心中服务器的概念。折扣在计费时由云
服务提供商应用。事实上，预留实例本质上是一个计费能力。
AWS
预留实例可以提供计
费折扣之外的一些容量功能，我们将在后面详细介绍。
预留实例或承诺使用折扣通常以不确定的方式应用于单个资源。云服务提供商基于一套 ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.