Cloud computing and the Internet of Things "IoT", very extraordinary technologies, are each part of our lives. Their mass adoption and utilization are predicted to increase further, making them important components of the Internet of the destiny. A novel paradigm where cloud and IoT are merged collectively is foreseen as disruptive and a catalyst for a huge quantity of application scenarios. In this paper we awareness our interest on the mixing of cloud and IoT, which we name the "Cloud IoT" paradigm. Several works inside the literature have surveyed the cloud and IoT separately their essential properties, features, underlying technologies, and open problems. However, to the satisfactory of our knowledge, those works lack detailed evaluation of the "Cloud IoT" paradigm. To bridge this gap, in this paper we review the literature about the mixing of cloud and IoT. We then describe the software scenarios that have been presented inside the literature, in addition to platforms both commercial and open source and projects implementing the "Cloud IT" paradigm. Finally, we perceive open troubles, key challenges and destiny guidelines on this promising field.
展开▼