EC2 Placement Groups

Placement groups

Placement groups are used to control our instance placement strategy. We can’t interact with AWS hardware directly. Placement groups allow us to control how our instances are placed on the underlying hardware. For a better understanding, let’s look at the placement strategies.

Cluster placement groups

Instances are grouped together into a low-latency setup in a single AZ. This allows for better interplacement communication in architectures where quick internode communication is essential, like big data jobs. However, there’s one drawback of using this strategy. If the underlying hardware fails, all instances in this placement group will fail at once.