Calculate request share from descriptor archives rather than believing in what relays say
When estimating the number of recurring daily users, we divide the number of locally observed requests by the expected share of requests seen at that directory. The result is the estimated number of total requests in the network. Right now, we're using self-reported request shares for this calculation, but these numbers may be wrong. Only recently in May and June 2010, the directories report very low shares of 1/10 of the usual shares or even 0.0%, which must be wrong. Rather than believing the relays here, we could determine request shares that directories should see from the descriptor archives. The descriptor archives reveal how many directory mirrors there are and what bandwidths they advertise that are used for load balancing by clients. The request share of one of the directories is its bandwidth divided by the bandwidth of all directories.