@inproceedings{Johnson+:pam08, author = "David Johnson and Daniel Gebhardt and Jay Lepreau", title = "Towards a High Quality Path-oriented Network Measurement and Storage System", booktitle = Ninth Passive and Active Measurement Conference, address = "Cleveland, {OH}", year = 2008, month = apr, pages = "102--111", doi = "10.1007/978-3-540-79232-1_11", abstract = "Researchers need current and historical measurements of Internet paths. We built and deployed a complete system designed to fill these needs: a safe, shareable, multi-user active network measurement system probes network paths and reliably records measurements in a storage facility with multiple levels of caching, providing users with fast, flexible querying. Our system, deployed on PlanetLab for over 20~months, has accumulated 940~million measurements and made them publicly available in a separate, federated data repository. Our experience shows that building and running such a valuable research tool poses significant engineering and practical challenges." }