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A comment on How Rsync Works. Parent comment

Re:How Rsync Works by ars on Sunday October 06, 2013 @07:45PM (#6505922)
It doesn't know which files exist on the server.

And the file can change on the server just as easily as the client. So how can it tell this without sending the complete list?

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Re:How Rsync Works by ape4 on Sunday October 06, 2013 @08:09PM (#6505974)
Yes in the general case. But in the case of a backup that's done daily the sender can say... there are all the files that changed since we last did this.
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Re:How Rsync Works by ars on Sunday October 06, 2013 @11:50PM (#6506444)
Rsync is designed for the general case. It's useful for backups, but not designed for them.
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Re:How Rsync Works by tnhh on Monday October 07, 2013 @12:58AM (#6506570)
In this case, I think you want to be using unison rather than rsync.
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