Platform As A Service ( Paas )

As we learned in previous weeks, cloud computing services have three major different cloud architectures for different demanding customers. The three different architectures are Software as a Service (SaaS), Platform as a Service (PaaS), and Infrastructure as a Service (IaaS). For the words of the name, we can see the obvious differences among these three architectures, which they provide different cloud services based on their specific cloud architectures. What are the differences among these three cloud services? What are the responsibilities for the cloud services providers? What are the responsibilities for the customers? The following will discuss about these questions.

purposes of this paper, only PaaS and SaaS will be discussed. According to the Chief

Cloud computing offers services to users based on on-demand self-service, broad network access, measured service, resource pooling and rapid elasticity; These characteristics promise a faster time for implementation, lower cost, superior scalability and a better end user satisfaction. These services are delivered in models known as Software As A service (SaaS), Platform As A Service (PAAS), and Infrastructure As A Service (IAAS). The first layer which is the Software As A service (SaaS) is the layer in which software applications are delivered to end users. Below is the Platform As A Service (PAAS) layer which offers a platform on which applications can be developed. The lowest layer is the Infrastructure As A Service (IAAS) layer, in this layer the physical servers and network infrastructure is offered as a service. These services can be deployed throughout the internet (Public Cloud Computing), on the intranet infrastructure, (Private Cloud Computing), in a shared community of private networks (Community Cloud Computing), or a hybrid of both (Hybrid Cloud Computing). The service deployment models are [8]:

PaaS – Platform as a Service – Cloud providers deliver a platform, including operating system, programming language, database and web servers that developers can use to develop and run their software on a cloud platform without the cost and complexity of buying and managing hardware and software.

There are three standard service models: Infrastructure as a Service (IaaS), Platform as a Service (PaaS) and Software as a Service (SaaS). IaaS is when the cloud

Reordering the economics of software, cloud computing is alleviating many of the capital expenses (CAPEX), inflexibility of previous-generation software platforms, and inability of on-premise applications to be customized on an ongoing basis to evolving customer needs. These are the three top factors of many that are driving the adoption of cloud computing technologies in enterprises today. Implicit in the entire series of critical success factors that are forcing the migration of on-premise to cloud computing platforms is the greater agility and speed the latter platform offers. Line-of-business executives today are increasingly defining the priorities of IT departments, often also defining budgeting cycles as well. Their primary concern is ability able to quickly get up and running on a new enterprise application, integrating its workflows into existing legacy and 3rd party systems, databases and applications, while also getting the performance gains of the new software (Bentley, 2008). Due to these factors cloud computing is evolving rapidly, changing the economics of enterprise software especially. Large-scale systems are most often purchased using Capital Expense (CAPEX) budgeting processes that often take several months ot over a year to complete. Often CAPEX-based spending on enterprise software also requires the board of directors for a company to authorize spending large amounts on new

An example of an organization with a SaaS business model would be Facebook or LinkedIn; each offer access to software as a web-based interface. Platform as a Service is a computing platform being utilized as a service, which means that the platform is outsourced instead of an organization handling their own software or hardware features. An example of a PaaS business would be Windows Azure or Google App Engine, where applications or software can be created and distributed via one website. Infrastructure as a Service is where an organization completely outsources the management of their servers for data holding and is usually just billed for their usage. An example of a IaaS business would be RackSpace or GoGrid who concentrates primarily on storing the data on their services, allowing the cost efficient Cloud services that we enjoy.

Platform as a service: The client is able to deploy their developed application on the provider’s cloud infrastructure.

A hybrid Cloud Deployment model with a combination of Public, Private and Community models will be used. The Cloud Service Delivery model will be a combination of SaaS, PaaS and IaaS to satisfy the requirements of the multiple business units within the organization, customers, and suppliers resulting in a cost reduction through optimized and efficient computing

market needs. The primary goal of this research is to take an in depth look at PaaS

PaaS (Platform as a Service): this service provides a platform and an IT environment to implement different services and applications online. The user can create and deploy an infrastructure PaaS cloud with its own applications using languages and supplier tools. The user does not support or control the underlying cloud infrastructure (networks, servers, storage),

Cloud computing enables businesses to deploy or subscribe to services as it needs them. A cloud features self-service, broad network access, centralized shared resources, and measurement of service usage. There are three widely accepted types of cloud service models. They are Software as a Service (SaaS), Platform as a Service (PaaS), and Infrastructure as a Service (IaaS). Each serves a different purpose and business may choose to use just one, two, or even all three of the cloud types simultaneously as the needed.

PaaS (Platform as a Service) - Network Storage nodes and instances of Software development and hosting platforms are accessed over a remote length.

One of the biggest misguided perceptions of cloud computing is that cloud initiatives will greatly reduce the cost of doing business. That may be true for some initiatives but not all of them; after all, cost is not the only reason to leverage the cloud. Even if a company has a good business case for reducing costs in the cloud, it takes more than cloud computing to achieve the cost reduction. Companies need to design with cost in mind. The cloud can be cost-effective if the architecture effectively optimizes its usage of cloud services. In order to optimize costs, the architecture must monitor the usage of cloud services and track costs. Cloud services are a metered service where the cost is calculated on a pay- as-you-go model much like utilities such as electricity and water are in our homes. In legacy on-premises datacentres, purchased

PaaS provides sets of services and workflows that targets developers, who can use shared tools, technologies, processes and APIs to fast