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Event Store

Event Store is a database technology optimized for event sourcing and storing event data as a sequence of immutable records. It acts as both the system of record and source for updates or queryable state, which facilitates command query responsibility segregation (CQRS) patterns and domain-driven design implementations. This database offers complex event processing with subscription-based notifications when new events matching specific criteria are written to the log structure within it. Event Store can be used with various programming languages and frameworks while providing single-node or clustered deployment options for high availability configurations. The tool also includes projections, which are queries that run on live data streams to generate derived views without modifying source events.

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