GitHub user chenlica added a comment to the discussion: Improve resumable 
upload: track completion at the batch/session level

Per our offline discussion, I agree that it's important for the server to 
detect uploaded files and give the user an option to skip them.  A solution is 
for the server to keep track of the uploaded files.  

A technical challenge is whether we want to let the client site efficiently 
compute a signature of a file (e.g., checksum), using which the server can 
check if a server-side file with the same file name and checksum is likely the 
same file.  It will be good to know if other systems do this type of checking.  
My guess is possibly not due to efficiency concerns.

GitHub link: 
https://github.com/apache/texera/discussions/5744#discussioncomment-17346795

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