This goal isn't entirely unattainable, but reaching it will be a major challenge. Many different parameters must be taken into consideration. The latter is always welcome but hardly controllable, so let's concentrate on the former. The ability to scale incrementally to meet evolving customer demand, as well as the ability to meet spikes in user demand quickly, are equally important.
Scalability is all about reliability and performance.
IT professionals seem to agree that scalability is, above all, a design issue. Scalability issues are encountered on all design levels. The first level consists of a network hookup to an E-business system's intranet. Finally, the third level is made up of a local network's hardware servers and network equipment. The overall design of a scalable system must take all these aspects into consideration.