IBM Db2

Db2 is a family of data management products, including the relational database. It is famous for running on Mainframes (z/OS) but also runs on Linux/Unix/Windows (LUW).

When to Use

• Legacy/Mainframe: The backbone of banking and insurance legacy systems.
• Hybrid Cloud: IBM's "Cloud Pak for Data" strategy makes Db2 run anywhere (OpenShift/Kubernetes).
• Analytics: Db2 Warehouse (formerly BLU Acceleration) offers column-store in-memory acceleration.

Core Concepts

BLU Acceleration

Columnar storage + In-memory computing. Drastically speeds up analytics queries without complex indexes.

pureScale

Clustering technology (similar to Oracle RAC) for unlimited scalability and high availability on distributed systems.