The Cloud Makes It Rain Money: The Business in Cloud Computing - Deploying and Managing a Cloud Infrastructure - page 373

Chapter Essentials
Cloud Service Business Models Cloud service business models help organizations arrange
their requirements in a manner that reflects their needs. Businesses can focus on the actual
task of doing business rather than worrying about costs and ROI. Ideas can be quickly
prototyped without worrying about the need for all the long and tedious managerial and
administrative steps. Cloud business models include IaaS, PaaS, SaaS, and XaaS.
Service Model and Accountability Cloud computing is interaction between many layers
formed by applications, platforms, infrastructure, and network. Each layer can be offered
by different providers, which may go beyond their usual business scope. This makes things
complicated if there is an outage; for example, who is responsible and to what extent?
Therefore, roles need to be decided for suppliers, network service providers, cloud service
providers, cloud consumers, and end users.
The Enterprise Cloud Utilizing cloud computing for breakout opportunities and com-
petitive advantage is the defining aspect of the enterprise cloud. It empowers fast business
innovation and improved collaboration while reducing costs. This is made possible through
massive scalability and flexibility, which are inherent properties of the cloud concept.
Business Continuity and Disaster Recovery Business continuity focuses on keeping
functional all or most aspects of a business in the midst of large-scale disruptive events. It
depends on three key elements: resilience, recovery, and contingency. Disaster recovery is a
subset of business continuity and focuses on keeping operational the most critical IT sys-
tems that support business functions. This is achieved through preventive, detective, and
corrective control measures.