Migrate data from one DB to another via CLI

Hello,

I have a database that is currently used in production with lots of data in it. I would like to create a dev database with the same content to test out some new features.

If the new features pan out, the dev DB will be marked as the prod_v2 the old prod_DB will be archived.

Is there a quick way to do this that does not involve reading each document from the prod db and then uploading it to the dev db ? There are many entries and it will take too long.

I tried to export the DB contents using the cli but I cannot find the right command to export all contents to a file.

Additionally, can I perform DB operations on the DB locally and then push the modified DB to the server ? It would be faster than sending millions of HTTP requests to a server.