I've got a machine with a wimpy CPU, only 1G of ram, and a 10Tb of disk space. I'd like to make a very reliable backup of what's stored on this machine.
As part of this I'd like to create par2 files for my backup archives before sending them up to amazon glacier.
As a preliminary test I ran par2 on a a 40G file. It only used 1% of ram, and it took a few hours.
So my question is: When I run par2 on a 900G file, what's going to happen? Is par2's memory usage bounded or is it linear or worse in the size of the file? Is it's CPU usage linear or worse?
I realize I could just try it, but since the best case scenario is this is going to take several days to run, I thought I'd ask if what I'm doing is silly or not before I try it.