Software-as-a-Service (SaaS) and external-facing Web applications differ from internal enterprise applications; consequently, they place different demands on application delivery controllers.
Whereas traditional enterprises look for an ADC that supports a wide cross section of applications, SaaS providers place greater value on how an ADC can benefit one application or service. Where enterprise IT may configure an application and not touch it for a year, SaaS providers need new features and continuous tuning in order to maintain a competitive edge. For enterprises with a stable user base, scalability means picking a right-sized solution; while for a SaaS provider experiencing exponential growth, scalability means selecting a solution that cost-effectively meets requirements both today and in the future.
To support the unique needs of SaaS providers, selection and development criteria for ADCs must be redefined with a focus on scalability, adaptability, affordability and simplicity.