dired-rsync is a great additional to Machine Learning workflow in Emacs

For those who needs to copy large files frequently from remote server to local, dired-rsync is awesome!

Helm provide the same feature out of the box with the rsync progress-bar displayed in mode-line, as it is async, many processes can be launched in queue. A limitation though, you can't copy from remote to remote, only remote to local or local to remote (it can be done manually by editing command line, but it is not provided preconfigured).