From: sc@fiat-linux.fr
Le 15-01-2026, jayjwa a écrit :
>
> rsync can run without SSH. scp and sftp are still there. 'slogin'
> disappeared for reasons I've since forgotten. scp is more for one file
> while rsync is for many.
Well, I don't know the purpose of scp, but the purpose of rsync is to
help you the most when your bandwidth is limited. So, if you want to
get something on your own computer, rsync is useless. It will copy
everything from Internet, but it wont help you with your bandwidth
because it has no way to be helpful. But, if you have something on your
own computer very similar, to something somewhere else, it will help,
because it will take only what's new on this somewhere else.
So, if you have a directory with a lot of files, it will download only
the newest files. If some files have been updated, then it will depend.
If some huge texte files have been updated, it will manage to download
only only some necessary parts and be faster.
If it's a binary file, it will depend on that file. If only some part of
that file changed, it will be able to download only some necessary part.
I mean, I guess you changed a video and add a part in the middle, if the
other parts of that video are similar, it will be able to download only
the necessary parts. I guess if the binary file has changed because of a
new compilation, it won't be able to help.
So the purpose of rsync is not between the number of files it's between
the similarity between the source and the destination. The more similar
they are, the best rsync is. Now, if you have a huge bandwidth and a
small directory/fil, you won't notice the difference. If you have huge
similar directories, rsync will be helpful.
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