Status Report for SLAC/DOE IEPM Project For December 1997 & January 1998

IEPM Home Page IEPM Site Map Network Monitoring PingER IEPM Papers and Presentations

Coordination/Publicity/Deployment

Prepared, got review, completed and distributed 30 page December 1997 Interim Report of the ICFA-NTF Monitoring Working Group.

Wrote a one page summary of networking activities for the ESnet Yearly Report.

Attended the January XIWT/IPWT phone conference.

Worked with Jim Leighton and Chin Guok of ESnet to understand the ESnet monitoring reports on link utilization that go back to 1990. Re-analyzed the data to provide reports on long term utilization trends for several HENP sites.

With Valeri Federov, a statistician from ORNL, discussed statistical experiment design techniques and how they might be relevant to optimizing the selection of collection sites etc. Also provided Valeri with information on how to access our raw data.

Worked with Elsevier to push forward publication of work on network monitoring in Computer Physics Communications.

Consulted with Walter Toki of Colorado State and also a member of the ESSC, on issues to do with the performance of the SLAC - Colorado State link.

Prepared Network Monitoring - Status report for the ESSC. Attended ESSC meeting in Washington and presented talk. Had many useful discussions with attendees.

Development

Grouping the Data

• Tables for metric-by-site are no longer generated from the timeping data by SAS, so Warren adapted the routine from group.pl to allow groups to be shown in pinghistory
• This option is not fully functional yet, but he will make it so the user can click on group name to view members of the group, e.g. ESnet.

Long Term Analysis

• Warren has completed the routines to calculate values for MTBF (mean time between failures) and MTTR (mean time to repair). He's working on a glossary to define terms and show the mathematics used to calculate the various values.
• A perl script generates reports for all sites by-month and all months by-site
• The perl script generates static html and text versions, the text version is used to display the results dynamically using pinghistory

Network Maps / Anemone

• Warren has collected some sample data of traceroutes to each of the nodes we monitor.
• The subsequent network map was too complicated to be of use, so he divided them according to groups; ESnet, Local ISPs, International, N America (East), N Amercia (West),
• I will set up regular tracerouting, to show the current status of the network on the maps.

TimePing

• Warren added a few lines to the ping collection program to email a warning if no packets are received back from the remote site. This is intended to keep us informed of potential problems, no attempt is made to send automated email to the contact for the remote site.

Revised 29 January 1998
URL: http://www-iepm.slac.stanford.edu/about/status/status-1998/status-01-98.html
Comments to iepm-l@slac.stanford.edu