Measures propagation #

The raw data received by the Kuzzle IoT Platform contains measurements that must be propagated within the different entities of the platform.

By default, measurements are stored in the platform/payloads collection as raw data frames

If the device is assigned to a tenant, then the measurements are propagated in the <tenant>/measures collection as measures (MeasureContent)

If the device is not assigned to a tenant, then the measurements are propagated in the in the platform/devices collection as embedded measures (EmbeddedMeasure) in the lastMeasures property.

Mechanisms of propagation #

Propagation is governed by a set of rules contained in devices and assets.

Propagation in tenant engine #

Tenant engine propagation occurs when the device is attached to a tenant with the device-manager/devices:attachEngine action.

The engineId text field of the device contains the index name of the tenant it was attached to.

The measures are then propagated in the <tenant>/measures collection as measures (MeasureContent).

If this field is null, then the device is not attached to a tenant and measurements are not propagated.

It is possible to check the assignment in the Admin Console:

The DummyTemp-linked1 device is assigned to the engine-ayse tenant.