Quality-of-service in data center stream processing for smart city applications

In this chapter we analyze the state-of-the-art of distributed stream processing systems, with a strong focus on the characteristics that make them more or less suitable to serve the novel processing needs of Smart City scenarios. In particular, we concentrate on the ability to offer differentiated Quality of Service (QoS). A growing number of Smart City applications, in fact, including those in the security, healthcare, or financial areas, require configurable and predictable behavior. For this reason, a key factor for the success of new and original stream processing supports will be their ability to efficiently meet those needs, while still being able to scale to fast growing workloads.