Our business has a requirement of loading 300 FBDI Journal files in single day

Summary:

Our business has a requirement of loading 300 FBDI Journal files in 20 hours with million lines in one file. There is no way to extend timeline of 20 hours as it is a very stringent requirement.

Content (please ensure you mask any confidential information):

All files are posted to single ledger or single cube. As per our understanding Given a time required to load one FBDI file and till journals are posted for 500k lines is 15 mins with GL Code Combinations are already created in advance. We are running more POCs. What approach should be taken for such requirements? Where overwhelming Bulk Journal import in a very short time is required ? This requirement is only for single day of month and not daily. Please note there are daily other integrations that are time critical for same ledger which should not get delayes.