The IBM zSeries family of enterprises servers use z/OS, the next generation of operating system replacing OS/390. The core of z/OS is the base control program MVS. Open-standard application server functions that support scalable, secure e-business applications are integrated with the MVS base.
The z/OS platform can provide scalable, secure processing for various types of workloads in a high-performance environment, such as stock trading. The applications can be batch, OLTP (Online Transaction Processing), or DSS (Decision Support Systems). The major strengths of this environment are availability, flexibility, manageability, reliability, scalability, and security.
The DB2 database management system operates as a formal subsystem of the z/OS operating system. DB2 processes can be executed in various address space regions within z/OS, such as IMS or CICS. Because it is required for DB2 version 8, z/OS provides a new architecture that supports a 64-bit operating system. Thus, the z/OS platform can support many diverse applications with increased availability, scalability, and security.