THEORY AND FEATURES OF SAAS (SOFTWARE AS A SERVICE) FOR CLOUD COMPUTING
Narahari Narasimhaiah, R. Praveen Sam · 2015
Software as a Service (SaaS) is a software distribution model(1) in which are hosted by a service or vendor provider and over the network made available to customers, typically the Internet. SaaS is a prevalent delivery model that supports Web services and service- oriented architecture (SOA)(4) mature and new developmental approaches. Around the world broadband services are available to support user access from more areas. SaaS is closely related on demand computing software delivery and ASP (application service provider) models. For SaaS, IDC identifies two slightly different delivery models. It is similar to ASP for the hosted application management (hosted AM) model: For customers it delivers over the Web, and a provider hosts commercially(3) available software. The provider gives customers network-based access to a single copy of an application created specifically for SaaS distribution for the software on demand model. SaaSprovides licenses an application to customers either as a service on demand, through a subscription, in a pay-as- you-go model, or (increasingly) at no charge. To generate revenue from streams other than the user, such as from user list sales or advertisement, SaaS is a rapidly growing market as indicated in recent reports that predict ongoing double digit growth. This rapid growth indicates that SaaS will become commonplace within every organization and hence it is important that buyers and users of technology(4) understand where it is suitable and what SaaS is.