4 ms·

Copies. Have any simple-ish tech stack, and have many copies of the SAME thing. ie: Get N-ipads, N-rasperrys, etc. Then N copies of whatever you need to powe

by mamcx 5y ago

Copies. Have any simple-ish tech stack, and have many copies of the SAME thing. ie: Get N-ipads, N-rasperrys, etc. Then N copies of whatever you need to power, connect, protect, etc (cables, routers, ups, batteries, etc). Then N copies of the data in N storages -- This is probably the best course: REPAIR anything will be near impossible.

vinni2 5y ago
What’s the right value of N? That’s the tricky part.
- Jtsummers 5y ago
  Estimated based on MTBF (mean time between failure), and expected duration of the apocalypse. If it's truly apocalyptic (nuclear holocaust, not a large scale but conventional war), then the expected duration is your lifetime. Let's say you only want one of the device operational at a time, then you want: Spares = Apocalypse Duration / MTBF This is under the assumption that you will never get any more spares for the duration of the apocalypse. So if your iPad breaks once a year on average, and you expect civilization to have reached basic recovery levels to give you an alternative or replacement for your iPad in 10 years, you want 10 spares (well, I guess 9 in this case, stupid off-by-ones). If you have N gas generators operating (or that you cycle through to extend their useful lifetimes), you will want: Spares = Apocalypse Duration * N / MTBF An iPad battery, even used and recharged daily, should last you several years. Let's say 3 for the sake of the calculations and you only need one iPad. Then you want: Spare Batteries = Apocalypse Duration / 3 You may obtain those spares by getting spare iPads. Of course, you also have to consider spoilage. A battery sitting on the shelf for 3 or 6 or 9 years will have some chance of becoming a useless battery. This would force you into a rotation of the devices, charging them less frequently and finding a way to synchronize data between them.

by mamcx 5y ago

vinni2 5y ago

What’s the right value of N? That’s the tricky part.

Jtsummers 5y ago
Estimated based on MTBF (mean time between failure), and expected duration of the apocalypse. If it's truly apocalyptic (nuclear holocaust, not a large scale but conventional war), then the expected duration is your lifetime. Let's say you only want one of the device operational at a time, then you want: Spares = Apocalypse Duration / MTBF This is under the assumption that you will never get any more spares for the duration of the apocalypse. So if your iPad breaks once a year on average, and you expect civilization to have reached basic recovery levels to give you an alternative or replacement for your iPad in 10 years, you want 10 spares (well, I guess 9 in this case, stupid off-by-ones). If you have N gas generators operating (or that you cycle through to extend their useful lifetimes), you will want: Spares = Apocalypse Duration * N / MTBF An iPad battery, even used and recharged daily, should last you several years. Let's say 3 for the sake of the calculations and you only need one iPad. Then you want: Spare Batteries = Apocalypse Duration / 3 You may obtain those spares by getting spare iPads. Of course, you also have to consider spoilage. A battery sitting on the shelf for 3 or 6 or 9 years will have some chance of becoming a useless battery. This would force you into a rotation of the devices, charging them less frequently and finding a way to synchronize data between them.