Problem: I have a massive table - occupies a whopping 9.5 TBs. I need to delete around 5 mil rows from it. The best method I have come up with deletes 1 million records in 2 hours! Since I can not run this during peak time, I get only 2 hour window everyday and deleting 5 mil rows would take me 4 working days at this rate.

Question: I was wondering if SQL Server has a feature where I could run 2 or more deletes on a table simultaneously. Possibly something like virtually partitioning the table - not sure.

I also want to add that running my script induces page locks but keeps the transaction log from growing. My script is very similar to the one suggested by vonPryz:

How to Delete From Large Tables in Batches Without Growing the Transaction Log by Greg M Lucas.