Volume pricing discounts your product base prices based on the number of items ordered of identical products, eg 1-3 = standard price, 4-6 = lower, etc. Buy in volume, get a discount.
The module currently fully supports MySQL as long as load balancing has the data stored on the single MySQL server and permissions are set correctly on the data directories. This would be the case in most of the server setups. .
Emporium Plus creates and licenses plugin modules for Miva Merchant, a highly extensible eCommerce shopping cart application for the Internet.