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I'm uploading a file via rsync from my local machine to a server so that a colleague can download it to his machine. Normally I would notify him to start downloading when the upload is complete, but is there some combination of commands that would allow him to begin downloading while I am still uploading, and then resume after my upload is finished to get the complete file? I'd like to do this for individual files and for directories if possible.

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Doesn't rsync already do this by default? How is your colleague downloading the file? – derobert Sep 10 '12 at 14:00
See my comment to Rqomey. – joebolte Sep 10 '12 at 14:11

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Rsync creates a temporary file called .filename.$$$$ If your friend wants to download while uploading they should download this file using the -P extension, as once you finished, the file will disappear, and he may have to resume the download using the correct filename

I just tested this with rsync and you can download that temp file while you are uploading it. A little bit messy, but it works!

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By default, rsync writes data to a temporary file, and then copies the file to the correct location when the file is complete, so I don't think it's as simple as -P. – joebolte Sep 10 '12 at 14:11
@joebolte Indeed I am wrong, the rsync has to be cancelled before the file is created, I have updated my answer with a workaround – Rqomey Sep 10 '12 at 16:34

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