Coordinated sampling sans origin-destination identifiers: algorithms and analysis

  • Authors:
  • Vyas Sekar;Anupam Gupta;Michael K. Reiter;Hui Zhang

  • Affiliations:
  • Carnegie Mellon University;Carnegie Mellon University;UNC Chapel Hill;Carnegie Mellon University

  • Venue:
  • COMSNETS'10 Proceedings of the 2nd international conference on COMmunication systems and NETworks
  • Year:
  • 2010

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Abstract

Flow monitoring is used for a wide range of network management applications. Many such applications require that the monitoring infrastructure provide high flow coverage and support fine-grained network-wide objectives. Coordinated Sampling (cSamp) is a recent proposal that improves the monitoring capabilities of ISPs to address these demands. In this paper, we address a key deployment impediment for cSamp-like solutions-the need for routers to determine the Origin-Destination (OD) pair of each packet. In practice, however, this information is not available without expensive changes. We present a new framework called cSamp-T, in which each router uses only local information, instead of the OD-pair identifiers. Leveraging results from the theory of maximizing sub-modular set functions, cSamp-T provides near-ideal performance in maximizing the total flow coverage in the network. Further, with a small amount of targeted upgrades to a few routers, cSamp-T nearly optimally maximizes the minimum fractional coverage across all OD-pairs. We demonstrate these results on a range of real topologies.