Amazon ECR's new blob mounting feature enables sharing of common image layers within a registry across different repositories. This reduces redundant storage of identical content and accelerates image push operations by reusing layers already stored in the registry.
The capability is designed for microservice architectures and applications built upon shared base images, simplifying management and reducing associated costs. This feature can be activated via the ECR console or AWS CLI and is available across AWS commercial and GovCloud regions.
Source & further reading
Amazon ECR now supports cross-repository layer sharing to optimize storage and improve push performance ↗Source published 2026-01-20. 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.