alessandro, real data and experience deeply appreciated. a few questions. o once a collector commits to ADD-PATH, it's a promise to keep the data forever; well, it's been 26 years of RV and a few less for RIS. - Did operators find the ADD-PATH data sufficiently useful to be worth the cost? How did they use the ADD-PATH data and how often? - Did researchers find the ADD-PATH data sufficiently useful to be worth the cost? How did they use the ADD-PATH data and how often? - Did folk develop special tools to take advantage of ADD-PATH data? o On the problem of stream/peer identification. You describe the divergence of BIRD and FRR. What about commercial router vendors? o You say data were often redundant, though not fully. Did you investigate mechanisms to reduce the storage, or did you see that as a path to complexity and fragility merely to save some spinning rust? o You mention the withdraw storm between your peer and their peer (and later an announcment storm, I presume). For peers with large out-degree, this could be likely. Were these data interesting in any way, or just more storage? again, thanks so much for real experience. gives me a bit more clue. randy