Does anyone have a clever way of mass creating item location config records that isn’t an import? I have 150 location x 8500 items so over 1 million rows so over 40 different imports.

I'd probably look at Celigo for this

I have cloudextend but item location records don’t seem to be supported

They are correct that we connect via SOAP and that record is not supported. Not sure, but maybe data loader?

Celigo data loader: https://docs.celigo.com/hc/en-us/articles/226949488-Create-a-Data-Loader-flow

@Tyler Lamparter this is working. Data loader must be based on REST. I'm at 800k right now on a free demo account.

We use custom RESTlets to achieve, but we also have our own internal queuing mechanisms to manage a file that large and then hit NetSuite restlets up to the concurrency specified. Glad it's working for you