this post was submitted on 03 Jul 2024
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I don't understand how this is an advantage. Yes, you can swap RAM with the system powered up, but what happens to the information in the module that was removed? Is the OS doing some kind of RAID-like memory allocation? The article wasn't clear on how this would actually work.
Apparently, there's some coordination mechanism, where you tell the OS that you want to remove a certain memory stick, so it moves all the memory onto other RAM sticks (or uses paging to move it to your hard drive). Only then would you actually physically unplug the memory stick.
See, for example: https://docs.kernel.org/admin-guide/mm/memory-hotplug.html
(Mind that this is kernel documentation. If you actually want to do this, there's probably some CLI program to make it easier.)
Then it's not Hot Swap, just Lukewarm Swap?
If you really want to be pedantic you could setup raid 1+0 or 5 and live the true RAM hot swapping life