Launch Groups - Leveraging Amazon EC2 Spot Instances at Scale

Launch Groups

You can launch a set of Spot Instances at once in a launch group or in an Availability Zone group. With a launch group, if the Spot service must terminate one of the instances in a launch group, it must terminate them all. With an Availability Zone group, the Spot service launches a set of Spot Instances in the same Availability Zone.

When launch groups are required, try to minimize the group size. Larger groups have a lower chance of being fulfilled. Also, be aware that specifying a specific Availability Zone can increase your chances of successfully launching. To learn more about launch groups and Availability Zone groups, see How Spot Instances Work.