In legacy/trac#27135, sbws starts keeping observed bandwidths for relays: > > Taking the descriptor observed bandwidth only when the relay is measured and calculating the mean when there're several observed bandwidth values for the same relay Here are some options: * use the latest measured and observed bandwidth * take the latest measured and observed bandwidth every hour, and - average the last N days of bandwidths - apply an exponentially decaying average to all bandwidths We need to decide which strategy to use, update the bandwidth file spec, and implement this feature in sbws.