Abstract: Technology is described for receiving time series data to be transmitted to a server. A network connectivity problem may be determined to exist for a computer network with the server which prevents the time series data from being transmitted to the server. A mathematical function that represents the time series data received while the network connectivity problem exists for the server may be calculated and transmitted to the server.

Abstract: Technology is described for receiving time series data to be transmitted to a server. A network connectivity problem may be determined to exist for a computer network with the server which prevents the time series data from being transmitted to the server. A downsampling function may be applied to the time series data to produce reduced granularity data points that represent an approximation of the time series data to be transmitted to the server after the network connectivity problem has occurred with the server. The reduced granularity data points may be transmitted to the server.

Abstract: Technology is described for management of shadowing for devices. A computing hub may store device data from a device in a buffer associated with a local device shadow of the device. The computing hub may determine a write status of the device data using a last write marker representing a last data entry written to the buffer. The computing hub may also determine a shadowing upload status of the device data using a last sent shadow marker representing a last data entry of the buffer sent to a device shadowing service in a service provider environment. The computing hub may send computing hub information that includes the last write marker and the last sent shadow marker to the device shadowing service in the service provider environment.