Best way to save a file on a server that is loaded in chunks?

Question

I am mainly looking for the best way to store partial downloads on the server. Files will be uploaded piece by piece. Pieces can run in parallel and in random order. I need to temporarily save them somewhere in some form, and then build the complete file from the loaded chunks. I have some ideas on how to do this, but I wonder if there is any best practice already, or a standard, or some kind of RFC ..?

UPDATE:

Download occurs through HTTP.

Answer 1

This problem has been resolved many times before. Use BITS, torrents, FTP, etc.

The basics:

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