Db2 features and Db2 product editions

Db2 database product editions and deployment options
You can choose from several Db2® product editions that are designed to scale to your ongoing business needs. For more information about entitlement, rights, and obligations, see the license agreement for your product or offering.
Functionality in Db2 product editions
With Db2, all editions have the same code base. The technical differences among editions are resource limitations functionality advanced features or tool sets. In this way, applications that are written for any Db2 edition can be moved easily to any other Db2 edition, on any operating system platform that is supported by Db2.
Mod packs, fix packs and special builds
To address software bugs and other defects, IBM provides mod packs, fix packs and special builds.
Virtual processor core licensing
A virtual processor core (VPC) is a unit of measurement that is used to determine the licensing cost of IBM products. The VPC is based on the number of virtual cores (vCPUs) that are available to the product.
Introduction to a Db2 pureScale environment
The IBM® Db2 pureScale® environment might help reduce the risk and cost associated with growing your distributed database solution by providing extreme capacity and application transparency. The Db2 pureScale environment is designed for continuous availability and is capable of exceeding even the strictest industry standard.