Physical database layer
An RDA (shown in Figure l) uses a common set of SQL and nonSQL (object) data base technology to provide transactional ( online transaction processing : OLTP) and real-time analytical capabilities. These are a commodity: they should be leveraged using open APIs to
allow for easy integration with external applications, and thus shouldn’t be dependent
on the databases. In this architecture, there’s little reliance on proprietary database features, such as stored procedures and triggers. The databases can reside on customers’ premises or in a private or public cloud. IOT data comes from sensors and devices. where the data can be gathered and processed in real time. An example is outdoor temperature data that needs the data response layer to make core decisions on the information from the thermometer (an IOT device) without having to send the data to the cloud.