Cloud Computing And Google App Engine Development

Cloud Computing is a fairly new term used to identify a type of computer connectivity, IT services and on-demand delivery offered via the web. The way that it works is, Cloud Computing offers an easy approach to accessing servers, storage, databases and a wide set of request over the Internet. Cloud Computing also allows cloud-based service providers to own and sustain the network-connected equipment necessary for these application services. This is all done while permitting a business to facilitate and use the services that are deemed essential via a web application (Amazon, 2016).

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]:

SaaS – Software as a Service – Users on the service are given access to the application’s software and databases, cloud providers manage the infrastructure and platforms that run the application. “On demand”.

PaaS can be described as an enlisting stage that allows the making of web applications quickly and successfully and without the multifaceted idea of buying and keeping up the item and establishment underneath it. PaaS is nearly taking after SaaS except for that, rather than being customizing passed on finished the web, it is a phase for the generation of programming, passed on finished the web.

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.

Cloud computing describes anything involving the delivery of hosted services over the Internet. The service takes it names from the cloud symbol used to represent the Internet in flowcharts and diagrams. Due to significant innovations in virtualization and distributed computing, along with improved access to high-speed Internet and a weak economy, interest in cloud computing has increased substantially in recent years (TechTarget, 2007).

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

Cloud computing is a computing resource which provides service through internet. Cloud computing provides various service models such as Platform as a Service (PaaS) where developer can design, build and test application that run on cloud providers infrastructure. [1] Example: Google application engine, Software as a Service (SaaS) is

SaaS (Software as a Service): this service is characterized by the use of shared applications. The user accesses the application through the network through various terminal types (web browser). The application administrator manages and controls some functions limited to application settings. It is therefore correctly perceived by users, applications as a consumer model. Example: Mail Gmail or Yahoo email providers.

SaaS (Software as a Service) - On-demand software applications through a web browser, avoiding a need of full scale installation, maintenance and monitoring of software application platforms and its infrastructure.

Cloud computing, a model for enabling convenient, on-demand network access to a shared pool of configurable computing resources (e.g., networks, servers, storage, applications, and services) that can be rapidly provisioned and released with minimal management effort of service provider interaction. From a user 's perspective, cloud computing is the use of the application without having to understand the mechanics involved in implementing it and making it accessible. From an IT perspective, it is the opposite end of the spectrum. For IT professionals, cloud computing means understanding how to deliver the experience and meet other business goals such as service level agreements (SLAs), reducing costs, compliance

Cloud computing comes up with designers and IT arrangements. capability to concentrate on factors such as providence, attainment and sufficiency planning. Due to increase in complications and costs of management, IT organizations found different models of cloud computing which respond to different needs of various users. National institute of standards and technology (2011) has described that cloud computing has three service models known as software as service(SAAS), Platform as a service (PAAS) and Infrastructure as a service(IAAS).cloud computing provides

SaaS applications offer wide range of configuration options and development environments that allows clients to set up their own additions and modifications.

The capability that is provided to the consumer is to deploy onto the cloud infrastructure consumer created or acquired applications created using programming languages, libraries, services, and tools supported by the cloud service provider. With the consumer not managing or controlling the underlying cloud infrastructure including network, servers, OS, or storage while the consumer does control the deployed applications and possibly configuration settings for the application hosting environment. (Peter Mell, Timothy Grance, The NIST Definition

c) Software-as-a-Service (SaaS): Software as a Service (SaaS) is a software distribution model in which applications are hosted by a vendor or service provider and made available to customers over a network, typically the Internet.