Amazon EC2 Auto Scaling now supports reservations then balanced Availability Zone distribution

Configure your Auto Scaling groups to use the new reservations-then-balanced Availability Zone distribution strategy by updating the AvailabilityZoneDistribution configuration, targeting reservations via Capacity Reservation Group ARN or individual IDs to optimize resource utilization and maintain operational simplicity.

Adopt the reservations-then-balanced strategy in your Auto Scaling configurations to maximize the use of pre-purchased capacity reservations, ensuring efficient resource utilization and maintaining the resilience of your deployments across Availability Zones.

Evaluate the new reservations-then-balanced strategy to maximize utilization of pre-purchased capacity and enhance operational resilience, ensuring cost-effective and reliable deployments across Availability Zones.