How long should sbws keep measured and observed bandwidths?
In #27135 (moved), 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.
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