Is the compare-dest flag a once off or continous process?

Help and Support
1

I am syncing a large (100TB+) cloud drive to my NAS via a mini-pc. The mini-pc mounts the NAS drive via NFS. The NAS uses a lot of power and my internet is not very fast so I would like to use compare-dest to look at the NAS and then sync the differences from the cloud to the mini-pc's 4TB ssd drive first so I can shutdown the NAS. 4TB would take about 4 days for me.

So my question is if the compare-dest does the fulle compare first for everything to create a list meaning I can shutdown the NAS once it starts or does it do the compare on folder by folder basis meaning I would have to leave the NAS turned on for it to work?

2

a quick test using a debug log would provide the answer...
also, might test --check-first

or
generate a list of files first, power off the nas, then run copy+delete based on that list.
https://forum.rclone.org/t/big-syncs-with-millions-of-files/40182

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