[转]AWS 实例购买类型选项

实例购买选项 – Amazon Elastic Compute Cloud

Amazon EC2 提供了以下让您根据需求优化成本的购买选项：

按需型实例 – 按秒为启动的实例付费。

Savings Plans – 通过承诺在 1 年或 3 年期限内保持一致的使用量（以 USD/小时为单位）来降低您的 Amazon EC2 成本。

预留实例 – 通过承诺在 1 年或 3 年期限内提供一致的实例配置（包括实例类型和区域）来降低您的 Amazon EC2 成本。

竞价型实例 – 请求未使用的 EC2 实例，这可能会显著降低您的 Amazon EC2 成本。

专用主机 – 为完全专用于运行您的实例的物理主机付费，让您现有的按插槽、按内核或按 VM 计费的软件许可证降低成本。

专用实例 – 为在单一租户硬件上运行的实例按小时付费。

容量预留 – 可在特定可用区中为 EC2 实例预留容量。

如果您无法承诺使用特定的实例配置，但可以承诺保证一定的使用量，请购买节省计划，降低按需型实例的成本。如果您需要预留容量，请为特定可用区购买预留实例或预留容量。可使用容量块预留 GPU 实例集群。如果能灵活控制应用程序的运行时间并且您的应用程序可以中断，竞价型实例就是经济实惠之选。专用主机或专用实例可以通过使用现有服务器端绑定软件许可证来满足合规性要求和降低成本。有关更多信息，请参阅 Amazon EC2 定价。

有关 Savings Plans 的更多信息，请参阅 Savings Plans 用户指南。

目录

确定实例生命周期
按需型实例
Reserved Instances
Spot Instances
Dedicated Hosts
Dedicated Instances
容量预留

Amazon EC2 provides the following purchasing options to enable you to optimize your costs based on your needs:

On-Demand Instances – Pay, by the second, for the instances that you launch.

Savings Plans – Reduce your Amazon EC2 costs by making a commitment to a consistent amount of usage, in USD per hour, for a term of 1 or 3 years.

Reserved Instances – Reduce your Amazon EC2 costs by making a commitment to a consistent instance configuration, including instance type and Region, for a term of 1 or 3 years.

Spot Instances – Request unused EC2 instances, which can reduce your Amazon EC2 costs significantly.

Dedicated Hosts – Pay for a physical host that is fully dedicated to running your instances, and bring your existing per-socket, per-core, or per-VM software licenses to reduce costs.

Dedicated Instances – Pay, by the hour, for instances that run on single-tenant hardware.

Capacity Reservations – Reserve capacity for your EC2 instances in a specific Availability Zone.

If you can't make a commitment to a specific instance configuration, but you can commit to a usage amount, purchase Savings Plans to reduce your On-Demand Instance costs. If you require a capacity reservation, purchase Reserved Instances or Capacity Reservations for a specific Availability Zone. Capacity Blocks can be used to reserve a cluster of GPU instances. Spot Instances are a cost-effective choice if you can be flexible about when your applications run and if they can be interrupted. Dedicated Hosts or Dedicated Instances can help you address compliance requirements and reduce costs by using your existing server-bound software licenses. For more information, see Amazon EC2 Pricing.

For more information about Savings Plans, see the Savings Plans User Guide.

Contents

Determine the instance lifecycle
On-Demand Instances
Reserved Instances
Spot Instances
Dedicated Hosts
Dedicated Instances
Capacity Reservations