I observed an interesting behavior in the authority votes regarding relay stability and am curious if anyone can comment.
Have a new relay, about ten days old. Relay is marked
Fast Guard Running Stable Valid
One 10 minute network outage three days ago and then a 68 minute outage one day ago for repair. Overall about 4680 seconds down over the last week, and if one uses a 646220 second timeframe per this post
https://lists.torproject.org/pipermail/tor-relays/2013-July/002255.html
It works out to about 99.27% uptime, which seems within the 98% threshold quoted in the posting.
What was interesting was that
Faravahar gabelmoo maatuska tor26 urras
all immediately removed the "stable" flag when the relay came back online after maintenance, while
dannenberg moria1
left the stable flag in place. The two remaining authorities
dizum turtles
have never set the stable flag due to heavy link congestion between AS286/AS3265 for 'dizum' and congestion within AS6461 for 'turtles'.
Then exactly 24-hours after the end of the outage the five naysayers turned the stable flag back on.
Mainly a point of curiosity, but I'd guess from this that the first five authorities listed above are using a much shorter window for evaluating stability while the second two are using the seven-day window. I couldn't find per-authority logging of this category of information so it's hard to know.
Perhaps it's relevant that the node was removed from the consensus directory briefly immediately after the outage ended.
Finally it is interesting that 'dizum' and 'turtles' have set the "guard" flag even though they consider the relay unstable. This is a recent development. Earlier the two impaired-path authorities had the guard flag set off.