Netherlands: Software

Introductie Windows Server 2016

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2 C H A P T E R 1 | The software-defined datacenter With this type of sprawl within the compute resource pool, we begin to have significant problems within the other pools of networking and storage. In essence, how do we keep up with what becomes cloud scale very quickly after an enterprise implements virtualization. This is where a business of any size needs to begin thinking in terms of the software-defined datacenter (SDDC). As previously mentioned, the compute elements are pretty well covered and have been for nearly a decade or more. Now, however, we need to take new approaches to networking and storage and bring agile concepts to all three of the major resource pools: compute, storage and networking. This will ultimately make it possible for your environments to become true clouds and service the needs of the business on demand. With this is mind, we can start on the path toward agile IT—toward building an IT infrastructure that is easy to grow and evolve as your business changes. Certainly if there's anything that characterizes the basic nature of doing business today, it's change. Delivering agile IT Most businesses think of SDDCs as hybrid clouds. This is because we are connecting our on-premises ecosystem to our cloud ecosystem. So, first let us define what exactly a hybrid cloud is. The National Institute of Standards and Technology, in a document titled "The NIST Definition of Cloud Computing" (http://csrc.nist.gov/publications/nistpubs/800-145/SP800-145.pdf), defines a hybrid cloud as the following: Hybrid cloud—The cloud infrastructure is a composition of two or more distinct cloud infrastructures (private, community, or public) that remain unique entities, but are bound together by standardized or proprietary technology that enables data and application portability (e.g., cloud bursting for load balancing between clouds). But how exactly does this work? Suppose that your organization currently has a traditional datacenter with file servers, web servers, database servers, and so on, and you've also added on some cloud services from a hoster or public cloud provider so that you can run some of your applications and workloads in the cloud. Does that mean you already have a hybrid cloud? No, it does not. The problem is that you're operating under two different paradigms: the old one of a traditional datacenter, which has very limited agility, and the new one of cloud computing, which has high agility and is managed very differently. Traditional datacenters are generally inflexible for a number of reasons and can scale up only slowly when the need arises. The cloud, on the other hand, is flexible and can scale easily on demand. Integrating these two different paradigms is like mixing oil and water: you can mix them if you try hard enough, but as time goes on, they will separate from each other. The key to a hybrid cloud is to manage your resources as if the cloud were not just "out there," but also in your datacenter. When this is the case, you can easily move your compute, networking, and storage resources from on-premises to the cloud, and vice versa. This makes it possible for you to scale up or down quickly to address the changing needs of your business as the marketplace evolves. You can take advantage of solutions such as cloud backup when it makes sense for your business to do so. You also can use the same set of tools to manage and run your applications and services on-premises and in the cloud. This can make work a lot easier for everyone from your developers to your administrators, freeing up time so that they can concentrate their energy on important tasks to keep your business growing.

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