This redbook is Volume 5 of a five-volume set that is designed to introduce the structure of an OS/390 and S/390 operating environment. The set will help you install, tailor, and configure an OS/390 operating system, and is intended for system programmers who are new to an OS/390 environment.
In this Volume, Chapter 1 provides an description of a base and Parallel Sysplex. A sysplex is a collection of OS/390 systems that cooperate, using certain hardware and software products, to process work.
Chapter 2 describes the MVS System Logger. System logger is a set of services that allows an application to write, browse, and delete log data. You can use system logger services to merge data from multiple instances of an application, including merging data from different systems across a sysplex.
Chapter 3 describes Global resource serialization (GRS) which offers the control needed to ensure the integrity of resources in a multisystem environment. Combining the systems that access shared resources into a global resource serialization complex enables you to serialize resourcesacross multiple systems.
Chapter 4 describes the operation of an MVS system which involves console operations or how operators interact with MVS to monitor or control the hardware and software and message and command processing that forms the basis of operator interaction with MVS and the basis of MVS automation.
Chapter 5 describes Automatic Restart Management (ARM) which is the key to automating the restarting of subsystems and applications (referred to collectively as applications) so they can recover work they were doing at the time of an application or system failure and release resources, such as locks, that they were holding. With an automatic restart management policy, you can optionally control the way restarts are done.
Chapter 6 describes the hardware management console (HMC) which provides a single point of control to manage your central processor complex (CPC).
Chapter 7 describes workload management which provides a way to define MVS externals and tune MVS without having to specify low-level parameters. The focus is on setting performance goals for work, and letting the Workload Manager handle processing to meet the goals.
Chapter 8 describes problem diagnosis. MVS supplies many tools and service aids that assist with problem diagnosis. These tools includes dumps and traces, while service aids includes the other facilities provided for diagnosis.