Date Added: Jun 2012
Today, a growing number of commodity devices, like mobile phones or smart meters, are equipped with rich sensors and capable of producing continuous data streams. The sheer amount of these devices and the resulting overall data volumes of the streams raise new challenges with respect to the scalability of existing stream processing systems. At the same time, massively-parallel data processing systems like MapReduce have proven that they scale to large numbers of nodes and efficiently organize data transfers between them. Many of these systems also provide streaming capabilities. However, unlike traditional stream processors, these systems have disregarded QoS requirements of prospective stream processing applications so far.