A software-defined data center (SDDC) is a data storage facility in which all elements of the infrastructure -- networking, storage, CPU and security – are virtualized and delivered as a service. Deployment, provisioning, configuration and operation of the entire infrastructure is abstracted from hardware and implemented through software.
Virtualization is central to the software-defined data center. The three major building blocks of the SDDC are network virtualization, storage virtualization and server virtualization:
- Network virtualization is a method of combining the available resources in a network by splitting up the available bandwidth into channels, each of which is independent from the others, and each of which can be assigned (or reassigned) to a particular server or device in real time.
- Storage virtualization is the pooling of physical storage from multiple network storage devices into what appears to be a single storage device that is managed from a central console.
- Server virtualization is the masking of server resources (including the number and identity of individual physical servers, processors, and operating systems) from server users. The intention is to spare the user from having to understand and manage complicated details of server resources while increasing resource sharing and utilization and maintaining the capacity to expand later.