On the doc, it states that you can upload multiple files from Storage to a table in separate requests:
Create a CSV file to populate your table – Data used to populate your
table is uploaded as a CSV file. Maximum size for a single source file
is 4GB, but you can import multiple source files to a table, either in
a single request or in separate requests.
Can those requests be issued concurrently? If yes, what will be a maximum concurrent number of uploading requests per account/bucket/table? If there’s no explicit quota on those numbers, does it mean you can increase uploading throughput as much as you want by issuing the uploading requests?
Thanks,
Kaz
The BigQuery quotas are listed here: https://developers.google.com/bigquery/docs/quota-policy
In summary, each import request can have a maximum of 500 files (each has to be under 4Gb). You can make two import requests per minute, with a max of 1,000 import requests per day