Hi Matthew,
Matthew Glennon:
While I understand that my relay lost the guard flag because of a weekend of downtime, I would expect that it would get it back after a while of stable again? Anyone able to shed some light on when it will get the flag back? https://metrics.torproject.org/rs.html#details/924B24AFA7F075D059E8EEB284CC4...
"Directory authorities assign the Guard flag to relays based on three characteristics: "bandwidth" (they need to have a large enough consensus weight), "weighted fractional uptime" (they need to be working most of the time), and "time known" (to make attacks more expensive, we don't want to give the Guard flag to relays that haven't been around a while first). This last characteristic is most relevant here: on today's Tor network, you're first eligible for the Guard flag on day eight."
I will suggest you to read the lifecycle of the new relay post [1], the Guard FAQ [2] and the guard flag section of the directory protocol [3].
[1] https://blog.torproject.org/lifecycle-new-relay [2] https://www.torproject.org/docs/faq#EntryGuards [3] https://gitweb.torproject.org/torspec.git/tree/dir-spec.txt#n2490
Hope this helps.
Cheers, ~Vasilis