Cloud Computing For Conceptual Diagram Information Technology Essay

Published: 2021-07-26 03:20:06
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INTRODUCTION:
Cloud computing is Internet-based computing. In this shared resources, software, and data are provided to machines and other tools on request. The word cloud is used as a metaphor for the Internet, depends on the cloud picture used in the past to signify the telephone link and then to represent the Internet in computer network figures as an generalization of the primary infrastructure it denotes. Typical cloud computing suppliers provide shared trade uses online and they are retrieved from either the other Web service or software such as Web browser where as the software and records reside on servers. An important component of cloud computing is customization and the formation of a user-defined experience.
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Fig.1 Cloud computing for conceptual diagram
Major cloud computing infrastructures involve facilities sent via common centers and built on servers. Clouds frequently look as single points of access for all customers' computing desires. The main cloud service suppliers are Microsoft, Salesforce, Amazon and Google.
LITERATURE REVIEW:
Cloud computing can be explained as "a model for enabling convenient, on-demand network access to a shared pool of configurable computing resources that can be rapidly provisioned and released with minimal management effort or service provider interaction. This cloud model promotes availability and is composed of five essential characteristics, three service models and four deployment models." [1].
Cloud computing is a new term in information technology and like other Information technology terms it has also a history. Many people argue that it is not a new term. Now, let see some statements given by some people.
According to Colaner 2010 [2], "it is not new, the metaphor may be but the underlying technologies have been well-established for a long time", Technologies such as the Grid
systems, internet, any IT outsourcing -- network infrastructure, security monitoring, remote hosting are all forms of cloud computing. According to Schneier 2009 [3], "it is a modern
version of the timesharing model from the 1960s when computers were expensive and hard to
maintain which was eventually killed by the rise of the personal computer.
History of cloud computing is the evolution from super computer to cluster computing where computers were brought together which form a single large computer which creates a sense of super computer. [4]. Grid computing come after the cluster computing in 1990’s and it was considered as the future of computing because it was cost effective, it could solve problems with computing power. According to Leyden 2009 [5], "Cloud Computing found its origin in the success of server virtualization and the possibilities to run IT more efficiently through server consolidation."
After grid computing, utility computing come. It is the consumption of computing services as a utility. Here, charges are placed on actual consumption and not on flat rate. This whole concept was developed to make cloud computing.
Fig.2 Evolution of Cloud Computing
MEANING OF CLOUD COMPUTING:
Cloud computing is a model for allowing suitable, on-demand network access to a common pool of configurable computing resources. For example, servers, networks, storage, applications and services that can be quickly provisioned and unconfined with nominal management struggle or service provider communication. This cloud model supports availability and it has five important features.
Important Features:
On-demand self-service
Broad network access
Resource pooling
Rapid elasticity
Measured Service
NEED OF CLOUD COMPUTING:
Accepting a cloud computing approach can help companies guide their primary trade
events with fewer bother and larger productivity. Enterprises can exploit the usage of
the current hardware to design and assist particular peaks in practice. Thousands of virtual
machineries and applications can be managed very simply by using a cloud such as environment.
Companies can also save on power prices as they decrease the number of servers necessary.
And with IT staff giving less time in handling and observing the information. IT groups
are sound located to more rationalize the processes as employees finish more work on less machineries.
FEATURES OF CLOUD COMPUTING:
Agility develops employers' ability very quickly and economically re-provision technical infrastructure resources.
Cost can be defined as significantly decreased and capital expenses is altered to operative expenses. There is no maintenance cost, we don’t have to purchase the license of any software. We can directly access the required software from the cloud itself. Thus, there is a cost reduction for the organization.
Device and location independence allows employers to access systems using a web browser irrespective of their location or what device they are using. For example, employees of the organization can access the services of the cloud within the organization premises or outside the premises.
Centralization of infrastructure in locations with lesser costs like real estate, electricity, etc.
Reliability is upgraded if various redundant sites are used, which prepares well designed cloud computing which is appropriate for industry stability and disaster recovery.
Scalability means to expand. In this case, organization can expand the resources. If the company is using say 4 routers from the cloud but if it wants more in future then it can easily access from the cloud without any purchasing cost or maintenance cost. Company just have to pay rent for it and as soon as company is finished with the use of this, it can leave it easily to the cloud.
Maintenance is easy because there is no need to install the applications on each user’s PC and if customer want to access other applications then it can be instantly provided using the cloud software as a service.
ARCHITECTURE OF CLOUD COMPUTING:
Cloud architecture included in the supply of cloud computing, typically includes various "cloud components‟ interacting with each other over application programming interfaces, generally web services. This looks like the Unix ideas of having several programs each doing one thing good and working together over universal interfaces. Difficulty is assured and the resulting systems are more controllable. The two best significant modules of cloud computing architecture are the front end and the back end. The front end is the part which is seen by the client, that is the computer user. This consists of the client‟s network or computer and the applications used to access the cloud via user interface like web browser. The back end of the cloud computing architecture is the cloud itself, comprising numerous computers, servers and data storage devices.
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Fig.3 Cloud computing sample architecture
Cloud has integrated server administration system. Integrated server administers the system, balances client supply, adjusts demands, observers traffic and avoids blocking. This server follows protocols, normally known as middleware. Middleware controls the communication of cloud grid among them.
Cloud Architecture runs on a very significant assumption, which is generally correct. The assumption is that the request for resources is not always regular from client to cloud. Due to this object the servers of cloud are not capable to run at their full capability. To avoid this situation, server virtualization method is applied. In sever virtualization, all physical servers are virtualized and they run multiple servers with either same or different application. As one physical server acts as numerous physical servers, it decreases the need for more physical machineries.
As a problem of fact, information is the most significant part of cloud computing therefore, information safety is the top most importance in all the information processes of cloud. Here all the records are backed up at several locations. This surprisingly increases the records storage to several times in cloud compared with a regular system. Redundancy of records is crucial, which is a must have attribute of cloud computing.
LAYERS OF CLOUD COMPUTING:
Client
A cloud client involves computer hardware and software that depends on cloud computing for application distribution or that is in detail designed for supply of cloud services. Illustrations contain certain computers, telephones as well as other devices, operating systems and browsers.
Application
It facilities in delivering software as a service over the Internet, removing the necessity of installation and run the application on the customers’ machines and restructuring maintenance and support. People used to use the terms "Software as a Service (SaaS)" and cloud interchangeably, when in fact they are 2 different things. Key features include:
Grid-based access to, & controlling of, commercially existing software
Actions that are accomplished from central locations instead of at each customer's site, allowing customers to access applications remotely through the Web
Application provision that typically is nearer to a one-to-many model like single instance & multi-tenant architecture then to a one-to-one model which containes architecture, pricing, partnering, and management characteristics Integrated feature updating, which removes the need for downloadable patches & upgrades.
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Fig.4: Layers
Platform
Cloud platform service area or "Platform as a Service (PaaS)" provide a computing platform and/or solution stack as a service, often consuming cloud infrastructure & supporting "cloud applications. It helps in setting out of applications without the cost & difficulty of buying & handling the basic hardware and software layers.
Infrastructure
Cloud infrastructure service area also known as Infrastructure as a Service (IaaS) provides computer infrastructure usually a platform virtualization environment as a service. Instead of procuring servers, software, data-center space or grid tools, clients instead buy those resources as a fully contract out service. Suppliers usually bill such services on a utility computing basis & amount of resources consumed will usually reflect the level of action. IaaS grew from virtual private server offerings.
Server
The server’s layer includes computer hardware and/or computer software products that are explicitly planned for the distribution of cloud services which includes multi Updates 2010 Cloud Computing 9 principal processors, cloud-specific operating systems and combined offerings.
DEPLOYMENT MODELS:
Public cloud
A public cloud is one which is based on the standard cloud computing model where service provider makes resources like applications and storage, they are available to the general public over the Internet. Public cloud services may be free or offered on a pay-per-usage model.
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Fig.5: Cloud Computing Types
Hybrid cloud
A hybrid cloud environment consists of multiple internal and/or external providers will be typical for most companies. By integrating multiple cloud services customers can comfort the transition to public cloud services at the time of avoiding issues. Other perception on installing a web application in the cloud is using Hybrid Web Hosting where the hosting infrastructure is a mixture between Cloud Hosting for the web server and Managed devoted server for the database server.
Private cloud
Private clouds are mostly introduced for a single client. They give proposal for good security, quality of service and highest control over the information. Every business has its own infrastructure and the way in which applications are structured. Company's datacenter or a collocation ability can be used to install the private clouds.

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