... advanced and morebandwidth-demanding multimedia applications and services, e.g.,Internet Protocol Television (IPTV), Voice over IP (VoIP), onlinegaming. A plethora of QoS requirements and facilities ... fewer and cheaper resources. The situationis however more complex in the case of CDN since higher bandwidth and lower bandwidth cost also have as a side effect that customersdevelop more and ... such as streaming and on-demand. Important research questions are, e.g., scalability, overlaytraffic measurements and modeling, data search and retrieval, loadbalancing, churn handling, QoS provisioning...