Optimize unused capacity with Amazon EC2 interruptible capacity reservations

This article explains how Amazon EC2 interruptible On-Demand Capacity Reservations (ODCRs) enable organizations to share unused reserved capacity while maintaining reclamation control.

• Create interruptible ODCRs from existing reservations to repurpose idle capacity
• Share capacity across AWS accounts using AWS Resource Access Manager (RAM)
• Consumers discover and launch instances into shared interruptible capacity
• Capacity owners receive 2-minute warning before instances are reclaimed
• Consumers get EventBridge notifications to gracefully checkpoint and shutdown
• Reservation owners pay for unused capacity; consumers pay only for used instances
• Capacity automatically restores to original ODCR after consumer shutdown

Interruptible ODCRs optimize resource utilization and reduce costs by allowing temporary capacity sharing while preserving owner control for critical workloads.