Data Center Handbook, 2nd Edition

8SOFTWARE‐DEFINED ENVIRONMENTS

Chung‐Sheng Li¹ and Hubertus Franke²

¹ PwC, San Jose, California, United States of America

² IBM, Yorktown Heights, New York, United States of America

8.1 INTRODUCTION

The worldwide public cloud services market, which includes business process as a service, software as a service, platform as a service, and infrastructure as a service, is projected to grow 17.5% in 2019 to total $214.3 billion, up from $182.4 billion in 2018, and is projected to grow to $331.2 billion by 2022.¹ The hybrid cloud market, which often includes simultaneous deployment of on premise and public cloud services, is expected to grow from $44.60 billion in 2018 to $97.64 billion by 2023, at a compound annual growth rate (CAGR) of 17.0% during the forecast period.² Most enterprises are taking cloud first or cloud only strategy and are migrating both of their mission‐critical and performance‐sensitive workloads to either public or hybrid cloud deployment models. Furthermore, the convergence of mobile, social, analytics, and artificial intelligence workloads on the cloud definitely gave strong indications shift of the value proposition of cloud computing from cost reduction to simultaneous efficiency, agility, and resilience.

Simultaneous requirements on agility, efficiency, and resilience impose potentially conflicting design objectives for the computing infrastructures. While cost reduction largely focused on the virtualization of infrastructure (IaaS, or infrastructure as ...