This IBM Redbooks publication 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 resources

across 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.