What Is Openstack And Its Importance

Internetworks, or the Internet, allow for the remote supplying of IT resources to the people and are directly helpful in network access in far and wide. Cloud consumers can access the cloud using only private and dedicated network links in LANs, although most clouds are Internet-enabled. The Cloud platforms generally grows in parallel with improvement in Internet connectivity and service quality, which leads to its potentiality.

The focus of cloud computing is providing with scalable and a cheap on-demand computing infrastructure with a good quality of service levels. The process of the cloud computing involves a set of network enabled services that can be accessed in a simple and general way. Cloud computing provides with a unique value proposition for any organization to outsource their information and communication technology infrastructure. Moreover, the concept itself provides with a value proposition for an organization as using the cloud saves on cost, resources, and staff, and business opportunities for the organization (Katzan). An extensive connectivity of

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]:

The introduction of cloud computing infrastructure has brought in many changes to the infrastructure of any IT organization. Cloud computing has become the latest and most advanced infrastructure service to date. More and more companies are migrating to cloud computing service as days go, as they provide more flexibility and scalability and user friendliness in many aspects of an IT infrastructure.

Cloud computing has been defined by NIST as 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 or cloud provider interaction. Cloud computing can be considered a new computing paradigm insofar as it allows the utilization of a computing infrastructure at one or more levels of abstraction, as an on-demand service made available over the Internet or other computer network.

“Cloud Computing” is a buzzword that the IT industry has been talking about since the past few years. The future of computing is distributed and off-premise where remote servers handle terabytes of data every day. From both technical and social viewpoint, the concept of distributed data centers maintained by “server” companies somewhat dates back to 1990s where grid computing was actively thought upon as an IT requirement. Cloud Computing’s primary aim is provision of IT as-a-service to the cloud users on a utility-based delivery model envisioning greater storage availability, flexibility and scalability of IT systems.

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. (Reference: http://www.nist.gov/itl/cloud/)

Software-defined networking (SDN) is next evolving technology for the cloud computing as it provides a centralized system to manage the network. Scalable monitoring and dynamic reconfiguration requirements of the network makes SDN a perfect choice (Amna Riaz 2017).

This section of the article describes cloud computing as a group of computer systems connected over a public or private network that provides dynamically scalable infrastructure (equipment and software) for application, data and file storage. This means that the cloud can be easily modified to add or remove resources and infrastructure as needed. In continuing with the overview, the article notes that cloud computing is an innovative approach to traditional computing methods that can be utilized through the different cloud models.

Cloud computing can be defined as a model for enabling pervasive, convenient, on-demand network access provided to users to provide a shared pool of configurable computing resources. Networks, Storage, services, and applications make a part of these network sources. (Mell & Grance, 2011). In general terms, cloud computing can be stated as the process by which the users with the help of a web browser over the internet can remotely access data and program applications. A few characteristics of cloud computing are:

Cloud computing programs, or the ideas of them, have been around since the 1960s, but it was not until the 1990s that the services were finally available due to advancements in technology. But to fully understand the importance of this innovation we must define what cloud computing is. Per the National Institute of Standards and Technology, an agency that creates standards and guidelines for providing information security for all agency operations and assets has defined cloud computing as a model that have easy access to a pool of shared network. Cloud computing programs must have the following five characteristics to be defined as such: on-demand self-service, broad network access, resource pooling, rapid elasticity, and measured service. Once the program satisfies these five elements in can meet one of three service models: Software as a Service, Platform as a service, and Infrastructure as a Service and one of four development models: private cloud, community cloud, public cloud, and hybrid cloud. For the sake of this paper we will focus on Software as a Service (Grance, 2011, 2-3).

Today we are living in the era of internet where everything depends on it. As the days and years passes, traffic on internet is increasing abundantly, users wants high speed internet which can give the result of their aspired question within a fraction of seconds. To accomplish the requirement of the user, the need for improvement of existing network architecture. Here comes the role of SDN which is an emerging network architecture, our project is based on it which is discussed in later chapters. In the introduction part we are going to check about SDN and its related components.

A very logical approach however would be to decide who gets the power to manage resources like storage, network etc., which are essentially the core of the infrastructure for this reason we would require the assistance of software defined networking that has been brought out in the paper. The remaining parts of the paper comprises of Section II that looks at how the cloud computing system emerged and the models associated with it , with an elaborate idea of what IaaS in cloud is. Section III that discusses the fundamental concepts of software-defined networking, then Section IV describes the confluence of SDN with infrastructure as a service along with a case study, Section V elaborates future research direction, we conclude the article with Section VI and VII, providing the valuable insights we received through this project and conclusion respectively.

Infrastructure as a service is a form virtual cloud computing that provides virtualized computing services over internet [1]. In model, a third party provider gives hardware, software, servers, storage and other infrastructure components on behalf of its users. Providers also host user’s applications and handle tasks including system maintenance, backup and resiliency planning. Environments include the automation of administrative talks, dynamic scaling, desktop virtualization and policy based services. Leading service providers are amazon web services, windows azure, Google compute engine, Rackspace open cloud, and IBM smart cloud enterprise.

Software Defined Networking (SDN) is a rapidly growing technology which has received lot of attention. It addresses some of the long-standing challenges in the field of computer networks. It simplifies and makes it easier to management network. The core idea behind SDN is to pull out the intelligence from network devices like switch and router so that entire network can be controlled from a centralized single controller. The SDN controller has the global view of entire network devices. The controller can be customized by the network administrators or by the engineers as per the need of the business. The SDN technology makes the network programmable, agile, dynamic, scalable, flexible and centrally controlled. This paper initially focuses on the need of SDN. In the later part consists of architecture of the SDN enabled network, its different applications, challenges in implementing SDN.