updating server with rsync????

[Payal Rathod]

Hi,
I have 2 ftp servers with 3 identical users.
I want server B to be updated of server A.
Whatever changes mmade by users on server A should be made on server B
say every 5 hours.

Is rsync the right tool to use here?
Can rsync be used such that only changed files are downloaded?

Thanks a lot and bye.
With warm regards,
-Payal

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