Feature Comparison Across MSR Versions

The following table compares the features of MSR 4 with earlier product versions. Features are listed in alphabetical order.

Before you plan your migration, use the table to see how each feature has changed across MSR versions.

Feature	MSR 4	MSR 3	MSR 2
AI model registry	Supported	Not available	Not available
Artifact replication	Docker Hub, Quay, JFrog Artifactory, AWS ECR, Azure ACR, etc.	MSR, Docker Hub	MSR, Docker Hub
Audit logging	Extended API/UI activity tracking	Basic	Basic
Authentication	Local users, LDAP/AD, OIDC	Local users, LDAP/AD, SAML	Through MKE: local users, LDAP/AD, SAML
Backup integration	Velero-based backup/restore	Built-in	Built-in
Database	PostgreSQL	RethinkDB	RethinkDB
Foundation	CNCF Harbor	Proprietary	Proprietary
Helm charts	OCI only	Classic Helm charts	Classic Helm charts
Image signing	Cosign and Notation (Notary v2)	Docker Content Trust (Notary v1)	Docker Content Trust (Notary v1)
Metadata cache	Yes (opt-in)	No	No
Multi-level repository path	Yes	No	No
OCI artifacts	Images, Helm charts, signatures, SBOMs, AI models	Container images	Container images
Orchestration	Kubernetes, Docker Compose	Kubernetes, Swarm	MKE/Swarm
Preheat	Dragonfly- and Kraken-based P2P preheat	Not available	Not available
Promotion policies	Not available	Available	Available
Proxy cache and throttling	Full support with bandwidth control	Not available	Not available
Quotas	Per project	Not available	Not available
Repository naming	≤ 256 characters	< 56 characters	< 56 characters
SBOM support	SPDX, CycloneDX	Not available	Not available
User interface	Modern and intuitive	Improved	Basic
Vulnerability scanning	Trivy, Grype, Aqua, Anchore, and others	Black Duck Binary Analysis (built-in)	Black Duck Binary Analysis (built-in)

After you review the changes, continue to Choose a Migration Path.