The CHART system: A high-performance, fair transport architecture based on explicit-rate signaling

  • Jack Brassil
  • , Rick McGeer
  • , Raj Rajagopalan
  • , Puneet Sharma
  • , Praveen Yalagandula
  • , Sujata Banerjee
  • , David P. Reed
  • , Sung Ju Lee
  • , Andy Bavier
  • , Larry Peterson
  • , Stephen Schwab
  • , Larry Roberts
  • , Alex Henderson
  • , Bob Khorram
  • , Shidong Zhang
  • , Soonyong Sohn
  • , Brian Mark
  • , Christian Heiter
  • , John Spies
  • , Nicki Watts

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

TCP/IP is known to have poor performance under conditions of moderate to high packet loss (5%-20%) and end-to-end latency (20-200 ms). The CHART system, under development by HP and its partners under contract to the US Defense Advanced Research Projects Agency, is a careful re-engineering of Internet Layer 3 and Layer 4 protocols to improve TCP/IP performance in these cases. The CHART system has just completed the second phase of a three-phase, 42-month development cycle. The goal for the 42-month program was a 10x improvement in the performance of TCP/IP under conditions of loss and delay. In independent tests for DARPA at Science Applications In-ternational Corporation, the CHART System demonstrated a 20x performance improvement over TCP/IP, exceeding the goals for the program by a factor of two. Fairness to legacy TCP and UDP ows was further demonstrated in DARPA testing. We describe the CHART System as a set of five interacting services and protocol improvements which act together to make TCP/IP robust under conditions of loss and latency, and we describe and detail the test regime and performance results.

Original languageEnglish (US)
Pages (from-to)26-35
Number of pages10
JournalOperating Systems Review (ACM)
Volume43
Issue number1
DOIs
StatePublished - Jan 1 2009
Externally publishedYes

Keywords

  • Explicit-rate
  • Flow-based routing
  • Overlay
  • Quality of service
  • Virtualization

ASJC Scopus subject areas

  • Information Systems
  • Hardware and Architecture
  • Computer Networks and Communications

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