Scalable QoSbased event routing in publish-subscribe systems

This paper proposes a distributed and scalable publish-subscribe broker with support for QoS. The broker, called IndiQoS, leverages on existing mechanisms to reserve re-sources in the underlying network and on an overlay net-work of peer-to-peer rendezvous nodes, to automatically select QoS-capable paths. By avoiding flooding of either QoS reservations or link-state information, IndiQoS is able to scale with respect to network size and number of reser-vations. Experimental results show the validity of our ap-proach.