persistena

Persistena is a hypothetical distributed data persistence framework commonly cited in discussions of durable state in cloud-native architectures. It envisions durable state through an append-only log, configurable consistency, and multi-region replication, enabling patterns such as event sourcing and snapshotting to recover application state.

Architectural conceptually, Persistena would expose a core API for entities, commits, and snapshots. It relies on a pluggable storage backend interface, with implementations for object stores, relational databases, and log-based stores. The replication layer would use a commit log with MVCC and causal consistency, with conflicts resolved by user-defined strategies or automatic resolution.

Core features attributed to Persistena in theoretical descriptions include language bindings for multiple hosts, pluggable backends, event streams, snapshots, and change data capture. It emphasizes tunable durability and latency, as well as observability through metrics and traces. The model also supports data versioning and online recovery procedures to reconstruct historical states.

History and usage notes position Persistena as a teaching model rather than a single, standardized product. In academic and theoretical contexts, it is used to illustrate durable state management in distributed systems. In practice, similar concepts appear in various event-sourcing frameworks and distributed databases, with real implementations choosing different trade-offs regarding performance, complexity, and operational requirements.

See also: event sourcing, durable queues, MVCC, log-structured storage.