Refresher - I'm building a distributed chunked filestore in Go, and I setup a post for Part 1 here . That part dealt with uploading a file - this post is about downloads. Setup Requirements User hits our endpoint with the filename/fileid We use this fileid to get a list of chunks Our retrieve mechanism only depends on this list of chunks We want to be able to retrieve the associated chunks in parallel We want correctness (duh, but I'll explain why I explicitly stated this) The Test Suite First u