Capacity Reservation Resource Groups Expanded to Include Diverse EC2 Reservation Types

AWS broadened Capacity Reservation Resource Groups to organize and manage multiple types of EC2 capacity reservations for streamlined instance launches.

By Marcus Lane · Editorial pseudonym · 2026-08-25 · 1 min read

AI-ASSISTED REPORTING · RETROSPECTIVE ARCHIVE

Retrospective edition: 2026-08-25. Source published: 2026-08-25. Added to this archive: 2026-11-03. This briefing was prepared later from the linked announcement; it was not published on this website on the historical edition date.

Previously limited to On-Demand Capacity Reservations, Capacity Reservation Resource Groups were updated to incorporate Amazon EC2 Capacity Blocks for machine learning and interruptible reservations. This enhancement enables unified targeting of mixed reservation portfolios when launching instances.

Users benefit from improved control through prioritization preferences across reservation types and automatic fallback to On-Demand capacity when reservations are unavailable. This feature is accessible in all supported regions except AWS GovCloud (US) and China. AWS reports no additional costs associated with this capability.

Source & further reading

Capacity Reservation Resource Groups now support Amazon EC2 Capacity Blocks and interruptible Capacity Reservations ↗

Source published 2026-08-25. This report was prepared with AI assistance from the linked primary-source material. Claims and limitations should be checked against the original announcement or research.