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OreillyMultiCloudFinalEBOOK

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CHAPTER 1 Why Multicloud Architecture? Organizations are increasingly relying on the cloud for the deploy‐ ment and management of application stacks. In fact, most organiza‐ tions support many cloud-based applications. According to a 2018 IDG study, 73% of organizations have at least one application hos‐ ted in the cloud. Services that used to be managed entirely on- premises, such as the sales process, timekeeping, and human- resources management, now reside entirely in the cloud. At the same time, organizations are moving their own homegrown applica‐ tions to the cloud. Hosting in the cloud saves on initial infrastruc‐ ture costs, planned and unexpected maintenance costs, and operational costs. But there are challenges and complexities associ‐ ated with adopting a multicloud architecture that these organiza‐ tions should consider. Organizations need to weigh many factors when selecting a cloud service provider. One of the biggest challenges they face when migrating to the cloud is choosing the appropriate platform. Some‐ times, the choice is made for you. For example, some outsourced services work only with certain cloud providers. In other cases, organizations have become locked into using a specific cloud vendor when applications were first moved to the cloud. Another challenge associated with running a multicloud architec‐ ture centers on security. Organizations need to apply a consistent security policy across all cloud platforms that is consistent with the security policy of internal systems. In the end, it doesn't matter whether a system is onsite in the core of your network; sitting in an 1

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