Patent ID: 8924787
Filing Date: 2014-12-30
Classification: G06F,H04L

Abstract:
1. A debugging method used for a data center in a network, the method comprising: monitoring network traffic by collecting traffic information from a network controller; modeling an application signature, an infrastructure signature, and a task signature using a monitored log; detecting a change in the application signature between a working status and a non-working status using a reference log and a problem log; validating the change using the task signature; providing toubleshooting information; partitioning the monitored log into a plurality of time intervals, and computing the application signature for the plurality of time intervals; and determining that the application signature is a stable signature if the application signature for an application group does not change substantially across the plurality of time intervals, wherein an unknown change in the application signature is correlated to a known problem class by considering a dependency to a change in the infrastructure signature, wherein the network comprises an OpenFlow network and the traffic information is collected through at least one of PacketIn and PacketOut messages, and wherein the application signature is modeled by at least one of connectivity graph (CG), delay distribution (DD), component interaction (CI), partial correlation (PC), and flow statistics (FS).