Data Collection and Distribution

Data Collection and Distribution

• Each Collecting Site Maintains a List of Remote Sites That Are of Interest to It
• Each Collecting Site Runs a Perl Script (timeping)
  • Every 30 Minutes: First One 100-Byte Ping, Then Ten 100-Byte, Ten 1000-Byte Pings Sent
• Each Collecting Site Also Runs a CGI/Perl Script (pingdata)
  • Makes the Data Collected Above Available via HTTP
  • Allows Data for Specifc Time and Sites to Be Retrieved

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View Graphic Version

• Each Analysis Sites Run A Perl Script (pingcollect)
  • Retrieves Data from Collecting Sites
  • Puts It in a Common Storage Format
• Analyis Site Also Runs a Perl/CGI Script (pinggraph)
  • Allows User to Generate Graphs for Specific Links and Times through WWW Form
  • Uses the SAS/Graph System for Analysis and Graph Generation
  • Graphs are Produced in Postscript and Can Be Converted to PDF by Request