Let's say I have a rule that turns an outlet on and then off with a delay of 6 hours.
What happens if I turn the outlet on, then restart the hub? Will the rule pick up where it left off and turn the outlet off after the original 6 hours are over?
Edit - I'll answer this question tomorrow. I'm going to try it.
AFIK... Nope.... no restart/power/fail recovery within HE.
That's a good question. I know delays survive because the end is scheduled when the delay begins. I have a rule with a 1400 hr. delay, and it's been fine. I do wonder what happens if a rule is in a repeat.
I just tried this out of curiosity and I suspected that it wouldn't work but it did. The scheduled task that I had input before rebooting was still there after I reboot the hub. I even tried a shutdown, pulled the power and then rebooted. The delayed action was still there waiting.
What I don't think will happen is is the delay time is missed because the hub was off during that time, that the action will still occur after the hub is rebooted.
I agree if the time is missed it won't run. It's interesting that the delayed run did still exist. I'm curious though if the time started again from time of reboot/active or from the original time?
The end of the delay is scheduled when the delay begins. This is my furnace filter change notification rule that has a 60 day delay. The end date has not changed through numerous reboots.
I’ve had lights on with motion lighting during a hub shutdown that turned off immediately when the hub booted up. The lights had definitely missed the shut off time.
Maybe not quite the same thing, but during the 2AM maintenance, things like motion lights seem to fire (from an earlier trigger) right after maintenance ends. I think I have observed the same delayed but apparently cached action turn on a light from toggling a dashboard button.
A delay due to maintenance isn't really the same thing as the hub completely losing power.
Now of course, all of my experiments were executing a graceful shutdown. I'm not sure what would happen if you just yanked power from the hub. And since i'm a single-hub-user, I won't be experimenting with that one, thank you very much. 
let one of you multi-hub guys try that one out.
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