The Surveyor project team has added the ability to view traceroute information for any measurement plot occurring after March 19, 1998.Starting with the <http://ippm-db.advanced.org/plots> web page, the one-way delay and packet loss plots will have the following traceroute information available:
- Along the bottom of the measurement plot page is a plot of the time the traceroute measurements occurred. The x-axis of the plot shares the same time range as the plot above it, allowing a direct correlation of the activity on the delay or packet-loss plot with the last recorded traceroute for the specific time period. The vertical bars on the traceroute plot represent the time when the plot occurred; the bar colors and heights are varied to indicate variance in the actual content of the output of a traceroute (This bar plot is not available with plot pages after April 10, but will be available soon).
- Along the right of the plot page is a table listing the exact times the traceroutes were recorded with a link to the actual recorded traceroute. Clicking on the traceroute number will display a new browser screen showing the output of the traceroute at the specified time.
The traceroute command is issued for each path on each measurement machine with a Poisson distribution interval of ten minutes. It is possible that the Poisson distribution may cause traceroute "measurements" to be separated by periods far greater than 10 minutes. There is discussion of modifying the current traceroute measurement distribution so that future measurements will continue to use Poisson distributions, but the upper bound on times between traceroute measurements will be no greater than ten minutes.
Javascript must be enabled on your web browser before the plots pages will display correctly.
Please feel free to review this new feature and post your comments to the mm-tech@advanced.org mailing list or to the mm-info@advanced.org mailing list, which is distributed only to the Surveyor project team. We would be particularly interested in ways the information could be made more useful or in any specific insights you may have made with this new data.
Surveyor Measurement Machine Infrastructure Project Team