The Key success in getting your hardware sized correctly is by calculating your application load correctly and then sizing that with the appropriate hardware resources.
Choosing a technology and architecture which can grow as your business and/or application load grows is important.
Hardware sizing has come to play an important role when designing and implementing business critical applications because it is crucial that the existing or defined business and application requirements are interpreted into an appropriate hardware configuration.
If it is not done correctly, it may destabilize the environment which means interruptions and unplanned downtimes that in turn will cause business loosing not only vital revenue but also customer confidence in the process.
This is one of the reasons for why hardware sizing has become a discipline of its own and as such, each combination of workload and hardware configuration is treated differently.
Many application vendors have their own set of tools and recommendations to perform the sizing.
Once the sizing is performed, the results can be mapped to hardware that is already benchmarked. This also means the hardware can be configured specially to support the application workload in question.
It also implies that sizing is one of the major activities when creating a technical architecture where it is used to select the right hardware.
