| ID | product.device_management.registry_service.twin_store |
|---|---|
| Description | Desired / reported state per device. |
| Key | twin_store |
| Type | component:database |
| Team | Device Management |
| Owner | device-mgmt@iotgateway.example |
| Status | active |
| Technologies | PostgreSQL |
| Attributes | store: PostgreSQL (JSONB), versioned: true |
| Tags |
Table of contents
Guide
Twin Store
The Twin Store holds the device twin: the desired state operators want a device to be in, and the reported state the device last confirmed. Reconciling the two is how configuration safely reaches devices that are only intermittently connected.
Optimistic concurrency
Every twin carries a monotonic version. Desired-state writes must present
the expected version (If-Match); a mismatch is rejected so two operators
cannot silently overwrite each other.