This package backs the PubSub high-availability seams in OPCFoundation.NetStandard.Opc.Ua.PubSub (IPubSubActivationCoordinator, IPubSubLeaseStore, IPubSubRuntimeStateStore, IPubSubSecurityKeyStore) with the distributed redundancy building blocks from OPCFoundation.NetStandard.Opc.Ua.Redundancy (ILeaderElection, ISharedKeyValueStore, IRecordProtector), so multiple PubSub instances run as an active/standby redundant set with automatic failover.

Supported redundancy modes (Part 14 §9.1.6): None, Cold, Warm, and Hot (seamless takeover with sequence-number continuity per Part 14 §7.2.5.4.1).

See docs/PubSubHighAvailability.md for the design and usage.

Changes from Previous Version

No structural changes between v2.0.0-preview.3 and v2.0.0-preview.4.

Adoption Assessment

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This version is marked prerelease. Validate its API and upgrade path before production use.No SPDX license expression is published. Review the license text and your organisation's policy before redistribution.Compatibility metadata lists 6 target frameworks; confirm the exact target used by your application.The published metadata declares 173 direct dependency entries across framework groups. Inspect the resolved dependency graph for your target framework.