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Considerations for Transitioning Highly Available Applications to System z by David Ward, Dore Teichman, Michael Onoufriou, Eduardo Costa de Oliveira, James Mitchell, David Kra, Stuart Kopel, Christopher Hastings, Fernando Gieseler, Alex Louwe Kooijmans

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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 ...

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