it's the most intensive of the apps, but if it's just a simple rule, it's not terrible
not really.. other apps that update every device at once or things like android dashboard etc if you select all devices can be much more intensive.. it really depends on what apps you are using.. A blanket statement that rule machine is the most intensive is just not true.
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I understand that power failures can break the mesh for a period of time (and some devices may have to be re-paired), and I understand that in rare cases, the flash can get corrupted in the hub and prevent booting, but how can a power outage permanent kill a device? I donāt want to invest in a power backup right now since I would rather spend the money on smartifying more parts of my house. Power outages are also very rare here so I donāt think itās a great investment.
The radios in the devices like any electronics are very susceptible to recurrent power surges. I've had a number of switches where the radios fried but not the switch itself. Ge's are notorious.and they are replacing them for that reason. Ie for me usually on.off.on off on etc. In quick succession fries the radios.
in regards to rule making apps (Simple Automations, Basic Rules, Rule Machine, etc), it is
By adding some sort of power backup the hope is to reduce the chance of problems occurring and extend the life of the hub for as long as possible.
I guess the main worry like you mentioned is data corruption although having the voltage jump around (and not trip a surge protector) will likely stress some of the internal components but I defer to others as I am not experienced in that kind of thing.
I did have a bad power supply take out a C-4 hub once so I know electrical issues can harm the hub but a UPS would not have helped in that situation.
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I already have a surge protector, so the voltage isnāt an issue. Does the Hubitat have journaling in itās file system (making it easier to recover from forced shutdown)?
I cannot answer technical details beyond knowing that they are using Linux and JVM from prior discussions with the staff. I would expect whatever fs is used would be very lightweight so probably not journalled.
AFAIK corruption can occur in the db holding device and other information for HE. With Z-Wave the "real" device association table is stored in the Radio Chipset and I'm not sure how corruptable that is. It is also my understanding that the Zigbee info is stored on the hub so might be more vulnerable. The good news is the soft-reset procedure can usually bring things back if you have good backups.
Note: I am not an employee of Hubitat Inc. so these details are subject to further clarification and or correction.
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Thanks for the info. I have a nightly backup to google drive. A couple of times, I would wake up and the hub would have a blue led, and the web server would not show anything. Using soft reset via diagnostic, I got it back up and running in 10 min. I wonder if these events had something to do with power.
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It's possible or overheating maybe.
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