In SaaS the user uses different software applications from different servers

In saas the user uses different software applications

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In SaaS, the user uses different software applications from different servers through the Internet. The user uses the software as it is without any change and do not need to make lots of changes or doen’t require integration to other systems. The provider does all the upgrades and patching while keeping the infrastructure running.
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The client will have to pay for the time he uses the software. The software that does a simple task without any need to interact with other systems makes it an ideal candidate for Software as a Service. Customer who isn’t inclined to perform software development but needs high-powered applications can also be benefitted from SaaS. Customer resource management (CRM) Video conferencing IT service management Accounting Web analytics Web content management Benefits:The biggest benefit of SaaS is costing less money than buying the whole application. The service provider generally offers cheaper and more reliable applications as compared to the organisation [1]. Some other benefits include (given in): Familiarity with the Internet, Better marketing, Smaller staff, reliability of the Internet, data Security, More bandwidth etc. Obstacles: _ SaaS isn’t of any help when the organisation has a very specific computational need that doesn’t match to the SaaS services _ While making the contract with a new vendor, there may be a problem. Because the old vendor may charge the moving fee. Thus it will increase the unnecessary costs. _ SaaS faces challenges from the availability of cheaper hardwares and open source applications. 2.5.2 Platform as a Service (PaaS) PaaS provides all the resources that are required for building applications and services completely from the Internet, without downloading or installing a software. PaaS services are software design, development, testing, deployment, and hosting. Other services can be team collaboration, database integration, web service integration, data security, storage and versioning etc.
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Downfall (taken from [1]): _ lack of portability among different providers. _ if the service provider is out of business, the user’s applications, data will be lost. 2.5.3 Hardware as a Service (HaaS) It is also known as Infrastructure as a Service (IaaS). It offers the hardware as a service to a organisation so that it can put anything into the hardware according to its will [1]. HaaS allows the user to “rent” resources (taken from [1]) as _ Server space _ Network equipment _ Memory _ CPU cycles _ Storage space
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Cloud computing provides a Service Oriented Architecture (SOA) and Internet of Services (IoS) type applications, including fault tolerance, high scalability, availability, flexibility, reduced information technology overhead for the user, reduced cost of ownership, on demand services etc. Central to these issues lies the establishment of an effective load balancing algorithm.
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Domain (Cloud Computing) Fundamentals & Description 1.1 Defining Cloud Computing Cloud computing refers to both the applications delivered as services over the Internet and the hardware and systems software in the data centers that provide those services.
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  • Fall '14
  • Smith,R

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