Scalability

To accommodate an increase in the number of employees the system must be scalable. If the previously available resources become overtaxed, then it must be possible to expand the software to include additional resources. This goal results in a distribution of the applications among several servers usually located within a cluster. The system should then (possibly after a reconfiguration) make use of the new resources and thus offer improved performance without the occurrence of bottlenecks. It is important that the reconfiguration and redeployment of an application be flexible and not require major source code modifications and recompilation. Rigid designs that require that source code modifications be made in reconfiguring and redeploying the system reduce the system's flexibility and increase the burden on the system administrator.