this post was submitted on 24 Nov 2024
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Using the daemon also allows you to transfer faster by removing compression and encryption. It tends to hit the same rclone speeds without the data corruption issues.
You can do so directly in the ssh config or command line also. I've used this very thing in dense cluster private OpenStack deployments over the years.
Just trying to narrow down use case but I suspect the complex documentation just overwhelmed.
I've been doing the same in pull-backups for years. It works nicely.
(disclaimer: this information might be years out of date but i think it is still accurate?)
SSH doesn't have a null cipher, and if it did, using it still wouldn't make an SSH tunnel as fast as a TCP connection because SSH has its own windowing mechanism which is actually what is slowing you down. Doing the cryptography at line speed should not be a problem on a modern CPU.
Even though SSH tunnels on your LAN are probably faster than your internet connection (albeit slower than LAN TCP connections), SSH's windowing overhead will also make for slower internet connections (vs rsync or something else over TCP) due to more latency exacerbating the problem. (Whenever the window is full, it is sitting there not transmitting anything...)
So, to answer OP's question:
--rsh=ssh
as that is the default).man rsync
and read the section referred to by this:HTH.