u/moonsaiyan

I have a 4GB RPi 4B that I’m planning to use as a travel router with RaspAP and PiHole on RPi OS Lite in the microSD

I want to run Immich on it with 512gb nvme for library. A 64gb flash drive that I initially bought to be the OS drive would hold the database to lessen SD card wear and tear.

First question is, would the 4gb RPi be enough for this use case?

I have an existing Immich instance. Would migrating from it be as simple as doing rsync of the library folder before running the new instance?

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If you start at 100 and go down 25% to 75, you now need 33.3% to go back to 100. In a more extreme case, if you go down 75% to 25, you'd need 300% to get to 100. So going down 3x needs ~10x more to go back. Obviously, this is more logarithmic than linear

To put it in a different way, say you start at 100 and lost 20%, you go down to 80. But gaining back that 20% will only get you to 96. 20% going down is 20, but only 16 going up.