Hybrid Cloud : Hybrid Clouds

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]:

Cloud computing is a model which enables an expedient and on demand network access to a shared pool of configurable computing resources. These include networks, servers, storage applications and services which can easily be available with little managerial effort or the interaction of the service provider. The authors of this article seek to identify the critical factors which are needed in order to effectively deploy cloud computing, this was done by looking at key insights which could have an impact n the deployment of cloud computing. (Garrison, Sanghyun, & Wakefield, 2012).

Public clouds are multi-tenant architecture and has pay as you go system. Some of the top vendors are Microsoft Azure, AWS etc. In this kind of model, a third party provider makes resources to public through the internet. The users do not have to set up or maintain their own cloud servers in the house. The hybrid model has the capacity of cloud bursting and has benefits of both the private and public models. This model has both the private cloud and third party public cloud services. Rouse, M. (2017, July). Though there are these kinds of model, the users tend to choose multi-cloud model. This is utilization of two or more clouds. The benefit of this kind of was of operating is that they can easily migrate between the clouds and minimize the risk of service outage. According to a survey around 61 % of users use multi cloud models.

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

Cloud computing includes three service models, it is important to differentiate between them because the service provided is not the same and they do not address the same users. The three service models are:

According to the definition of the U.S. National Institute of Standards and Technology (NIST, 2011), “Cloud computing is a model for enabling ubiquitous, 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 or service provider interaction”. This cloud model is collected of five essential characteristics, three service models, and four deployment models. Moreover,

of organization, are discussed. Characteristics of cloud computing discussed to get idea what the cloud computing is all about using. In addition to that, deployment model of cloud computing is discussed in greater detail to explain cloud computing can be used as public, private or hybrid type. Based on service delivery cloud computing divided into three types Infrastructure-as-a-Service (IaaS), Platform-as-a-Service (PaaS) and Software-as-a-Service (SaaS) are explained further in this section.

There are a variety of definitions that are associated with cloud computing. However, the importance of how the technology is transforming business models greatly exceeds any specific definition. There are three components that are usually cited in any definition of cloud computing (Gabrielsson, Hubertsson, Mas, & Skog, 2010). The most commonly known component is the Software as a Service (SaaS). This allows organizations and consumers the ability to use software on demand and be billed for the usage on a per use basis.

In today’s technical world we are experiencing the advancement of moving or storing larger data from one place to another. 20 years ago it would be impossible to access any data from any part of the world today it is possible because of one new peace of technology and that is the cloud. The cloud is term that explains a type of technology that can be used anywhere. Just like the actual cloud we see in the sky is everywhere though out the planet so is the technical term cloud. There are four main types of cloud which consists of private, public, community and hybrid. Each one of these have their own pro’s and con’s that help an organization in one way or another.

Mostly the user of this kind of model runs cloud servers within its own data center. Public clouds are multi-tenant architecture and has pay as you go system. Some of the top vendors are Microsoft Azure, AWS etc. In this kind of model, a third party provider makes resources to public through the internet. The users do not have to set up or maintain their own cloud servers in the house. The hybrid model has the capacity of cloud bursting and has benefits of both the private and public models. This model has both the private cloud and third party public cloud services. Rouse, M. (2017, July). Though there are these kinds of model, the users tend to choose multi-cloud model. This is utilization of two or more clouds. The benefit of this kind of was of operating is that they can easily migrate between the clouds and minimize the risk of service outage. According to a survey around 61 % of users use multi cloud models.

The main purpose of the cloud technology from software perspective is to provide private and hybrid cloud, big data analytics, file storage, disaster recovery, and important backup. Generally, cloud providers offer services according to their models. There are mainly three standard models are available according to National Institute of Standards and Technology, which are Infrastructure as a Service (servers that allows user to store data and access the services), Platform as a Service (develop the software for the user to access cloud technology), and Software as a Service (graphical view of application, from where user can access cloud servers)

Hybrid cloud is a composition of two or more clouds (private, community or public) that remain unique entities but are bound together, offering the benefits of multiple deployment models. Hybrid cloud can also mean the ability to connect collocation, managed and/or dedicated services with cloud resources. It allows one to extend either

Hybrid cloud: The hybrid cloud provide internal control using private cloud and migrate the application from public cloud to private cloud as needed. The security access to these services are open to all.

Cloud Computing today has really reached in cloud 9 position.It is ever rising field in software and hardware world.Cloud Computing provides the utilities remotely.The utility it provides can be remote Operating System or it can be storage space or any such software and hardware utility.The user of cloud utilizes this resources remotely without having them in his own local machine.The local machines cannot store huge amount of data and process it,so by using cloud user can store its data on cloud for further processing.Cloud Computing principles are the reason why cloud is gaining huge success and popularity.

Disaster Readiness and avoidance: The hybrid cloud approach can provide the public cloud as a disaster recovery site to create and bring up workload in case of failure.