Considerations for Transitioning Highly Available Applications to System z

Introduction to systems availability

In this chapter we discuss the concept of system availability, which we define as the ability of a user to access the system, whether to submit new work, update or alter existing work, or collect the results of previous work. If a user cannot access the system, we say the system is unavailable.

 

2.1 Introduction

In today’s world, people rely on technology for communications, information, location awareness, and other services. Businesses rely heavily on complex computer systems to process, track and manage ...