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Forum Discussion
Upload multiple files in session
Backstory I have a bunch of small PDFs (18 kb each). filesUpload worked until I understood that a `429` is quite usual. Researched and found the batch endpoints. I wanted to use `/upload_session...
DB-Des
Dropbox Engineer
Dropbox EngineerMatthiD, I'm glad to hear you were able to find a solution for your use case.
To clarify, there are different types of 429 errors. It is always recommended to log the error message that accompanies an error code to get a better idea of what may be happening with the request.
To help avoid a potential lock contention error (429 too_many_write_operations), which might have been the case here, an upload session operation is recommended because of the way it handles uploads — as described in the Performance Guide:
Each file upload to Dropbox consists of the following stages: appending the byte contents of the file to an upload buffer on the Dropbox server, obtaining a namespace lock, and then committing those bytes as a file into a target namespace. The /files/upload endpoint does this atomically, whereas upload session decouples these steps.
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