You want to restore the very large backup of your mySQL database into the new or the same mySQL database. You can’t access the server shell and you can’t import the dump using phpMyAdmin or any other scripts due to hard memory resp. runtime limit of the web server.
BigDump does staggered import of large and very large MySQL Dumps (like phpMyAdmin dumps) even through the web servers with hard runtime limit and those in safe mode. The script executes only a small part of the huge dump and restarts itself. The next session starts where the last was stopped.