Measurement-based performance profiles and dynamics of UDT over dedicated connections

Qiang Liu, Nageswara S.V. Rao, Chase Q. Wu, Daqing Yun, Rajkumar Kettimuthu, Ian T. Foster

Research output: Chapter in Book/Report/Conference proceedingConference contribution

9 Scopus citations


Wide-area data transfers in high-performance computing and big data scenarios are increasingly being carried over dedicated network connections that provide high capacities at low loss rates. UDP-based transport protocols are expected to be particularly well-suited for such transfers but their performance is relatively unexplored over a wide range of connection lengths, compared to TCP over shared connections. We present extensive throughput measurements of UDP-based Data Transfer (UDT) over a suite of physical and emulated 10 Gbps connections. In sharp contrast to current UDT analytical models, these measurements indicate much more complex throughput dynamics that are sensitive to the connection modality, protocol parameters, and round-trip times. Lyapunov exponents estimated from the Poincaré maps of UDT traces clearly indicate regions of instability and complex dynamics. We propose a simple model based on the ramp-up and sustainment regimes of a generic transport protocol, which qualitatively illustrates the dominant monotonicity and concavity properties of throughput profiles and relates them to Lyapunov exponents. These measurements and analytical results together enable us to comprehensively evaluate UDT performance and select parameters to achieve high throughput, and they also provide guidelines for designing effective transport protocols for dedicated connections.

Original languageEnglish (US)
Title of host publication2016 IEEE 24th International Conference on Network Protocols, ICNP 2016
PublisherIEEE Computer Society
ISBN (Electronic)9781509032815
StatePublished - Dec 14 2016
Event24th IEEE International Conference on Network Protocols, ICNP 2016 - Singapore, Singapore
Duration: Nov 8 2016Nov 11 2016

Publication series

NameProceedings - International Conference on Network Protocols, ICNP
ISSN (Print)1092-1648


Other24th IEEE International Conference on Network Protocols, ICNP 2016

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications
  • Software


  • Lyapunov exponent
  • Poincaré map
  • RTT
  • UDP
  • UDT
  • Wide area transport protocols
  • concavity
  • dedicated connections
  • monotonicity
  • stability
  • throughput


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