English英语译成Chinese汉语 技术/工程设计 IT（信息技术） Virtualization

7. Spec and Purchase the Production Hardware

Based on the results from your lab testing and capacity planning, you should have a good idea as to what resources each of your physical host servers will require in production--at least to a point.

***Spec out the servers to be identical units***, from the CPU model to the amount of RAM present. In some instances it's much more financially sound to add another server than to add high RAM counts in a smaller number of servers: Since higher-density RAM is notably more costly than lower-density RAM, you may find that it's cheaper to purchase, for example, six servers with 32GB RAM each than three servers with 64GB RAM each. Buying a larger number of servers has the added benefit of broadening reliability, as you'll have more physical servers to take the load should a failure occur.