Enum DurabilityHealth

Namespace

Typhon.Engine

Assembly

Typhon.Engine.dll

Health of the durability subsystem (checkpoint cycle + WAL), surfaced for introspection and used by the checkpoint failure classification (CK-06).

public enum DurabilityHealth

Fields

Degraded = 1

The last cycle hit a transient stall (timeout / back-pressure) and will retry; no data at risk.

Fatal = 2

A fatal, unrecoverable error latched the checkpoint subsystem; surfaced for operator action.

Ok = 0

All durability operations are completing within budget.

Remarks

A Degraded state is recoverable: a transient cycle exception (back-pressure / lock / IO timeout — any TyphonException with IsTransient) is logged and retried on the next cycle, never latched. Fatal is terminal for periodic cycles (the subsystem stops advancing the checkpoint), but the shutdown path still attempts one last-chance flush cycle (04 §7).