[allegory]

Spot on.

This is not hard work. I'm not sure exactly what was being done that made this take more than an hour.

On our kit, which is pretty hefty, I'd schedule a 30 minute window for a 150Gb ETL even with heavy transformations.

When we moved our stuff from Mongo to SQL Server it took an entire 6 minutes to drag 30Gb over including SQL full text. That was a 16 core Xeon with 64Gb of RAM and 15K SAS RAID 10 so not a big machine either.