It is important to understand the various changes in data center technology and the evolution from traditional to converged and to hyperconverged infrastructure. As illustrated in Figure I-1, the traditional data center comprises the three layers of infrastructure—compute, storage, and networking (provided by individual companies as standalone layers)—where the customers are responsible for integrating these layers, basically building the complete infrastructure product themselves. Such environments are expensive to build and difficult to support, as there are a lot of different components (both hardware and software) involved. Maintaining traditional data centers involves many challenges, as upgrades, compatibility, and interoperability ...

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