Higher Performance Dynamic Consistency Boundary Development with Marten 9.0

This article discusses Dynamic Consistency Boundary (DCB) usage in Event Sourcing, contrasting it with traditional event stream organization. It explains how DCB allows tagging events for flexible transactional boundaries across multiple streams, a feature supported by Marten. The Marten 9.0 release introduces a more performant DCB option using PostgreSQL's HSTORE extension, which is cloud-compatible. The article provides setup instructions for greenfield projects and notes performance gains when querying by multiple tags. It is a technical guide for developers using Marten for event sourcing in .NET applications.