Rsync daemon: is it really useful?

I think the big difference is that if you’re using rsyncd on the server end, instead of rsync over ssh, the server already knows what it has, so building the file lists to determine what needs to be transferred is much simpler. It won’t make a difference if you’re just pushing around a few files, but if you’re making, for example, CPAN available over rsync, you don’t want to have to build the file list on the source side every time.

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