Abstract: One embodiment can provide a method and system for monitoring the performance of a network. During operation, the system can collect, from a network device, traffic data associated with a network; analyze the traffic data to discover dependencies among a plurality of applications and services accessed by client devices within the network; and identify, based on the discovered dependencies, a first server providing a first application and at least a second server providing a service that facilitates delivery of the first application. The system can further perform active measurement on the identified first server and at least the second server, thereby facilitating monitoring of performance of the first application.

Abstract: Some embodiments described in this disclosure provide methods and apparatuses for managing a network, e.g., by performing virtual topology adaptation for resource optimization. In some embodiments, a system can monitor traffic on the network to identify heavily loaded and/or lightly loaded links in the network. In response to identifying a lightly loaded link, the system can shift traffic from the lightly loaded link to one or more other links in the network. After the traffic has been shifted, the system can move circuitry associated with the lightly loaded link into a low-power state. In response to identifying a heavily loaded link, the system can activate a new link in the network by moving circuitry associated with the new link from a low-power state into a high-power state. After the new link has been activated, the system can shift traffic from the heavily loaded link to the new link.