1. Experimental Computer Systems Labs Resource Virtualization Techniques for Wide-Area Overlay Networks Kartik Gopalan Tzi-cker Chiueh Stony Brook University

2. Experimental Computer Systems Labs Goal Service Provider’s Physical Network Multiple Virtual Overlay Networks Provision maximum number of Virtual Overlay Networks with diverse QoS requirements.

3. Experimental Computer Systems Labs VON Requirements Logical isolation from other VONs. –Separate data-plane and control-plane. –Performance isolation. Each virtual link has –Bandwidth or end-to-end delay requirement. Deterministic/statistical Reliability requirement.

4. Experimental Computer Systems Labs Research Issues Resource provisioning at various levels –Goal : Maximize the baseline network resource utilization efficiency. –Provisioning algorithms for links, paths, and route selection. Run-time enforcement mechanisms. Comprehensive fault-tolerance strategy. Easy interface to specify, provision, and manage VONs.

5. Experimental Computer Systems Labs Current Status Developed algorithms for Admission control at link-level. Partition of end-to-end QoS over multi-hop paths. Route selection under QoS constraints. Scheduling to enforce deterministic/statistical QoS. Fault-tolerance –Node-level fault-tolerance via process-pair approach. –Link-level fault tolerance via backup path provisioning.

6. Experimental Computer Systems Labs http://www.ecsl.cs.sunysb.edu/ Thanks!