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Amazon EC2 可以設定 Spread Placement Group 要求打散機器

Amazon EC2 推出的新設計 Spread Placement Group,用來打散 instance:「Introducing Spread Placement Groups for Amazon EC2」。

本來的 Cluster Placement Group 是將機器集中在一起,對於 latency 極為敏感的應用會有幫助 (像是下面有提到 HPC 應用);這次推出的 Spread Placement Group 則是要求跑在不同機器上,打散降低風險:

Spread placement groups help reduce the likelihood of failures within clusters or groups of instances. Amazon EC2 has had cluster placement groups, which enable applications to get the low-latency network performance necessary for tightly-coupled node-to-node communication typical of many HPC applications. Now with spread placement groups, member instances will be placed on distinct hardware, reducing the impact of hardware failures on your applications.

然後也是全區開放:

Spread placement groups are available in all AWS regions. To get started, visit the AWS Management Console, AWS Command Line Interface (CLI), and AWS SDKs.

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