The migration towards virtualisation and centralised computing is not a simple journey but, when carefully prepared, it will bring tangible benefits, not only by rendering the infrastructure more efficient but also by adding a layer of flexibility to the infrastructure that will enable IT to be more agile and respond more quickly to changes to the business. This vision of a dynamic infrastructure fits perfectly with the IDC Dynamic IT model that defines how IT should be organised to cater to both operational needs and responsiveness to changing business conditions.

Virtualisation is an end-to-end solution, and each component of the solution must be carefully considered to address the specific circumstances of the business.  IDC urges IT managers to work closely with their IT provider to determine which architecture and technology best fit their environment:

• The infrastructure model. Moving away from distributed computing to centralised computing can take multiple forms: server-based computing, virtual desktop infrastructure, consolidated client infrastructure. Each infrastructure model has its pros and cons that must be measured against the specific requirements of the business before a choice can be made.
• Server-side hardware. The choice of hardware is critical and depends on the infrastructure model selected as the requirements vary significantly. Number of servers, number of processors, quantity of memory, type of storage and network components all influence the performance of the overall system.
• Client-side hardware. Thin clients represent strong cost benefits compared to PCs (reduction of 87% in hardware and software costs and of 61% in IT operations costs). However, thin clients must be chosen carefully as they vary greatly in form factor, functionality, and price.

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