Cloud Computing Solutions

Small Instance: The small instance (default) likens to “a framework with 1.7 GB of memory, 1 EC2 Compute Unit (1 virtual center with 1 EC2 Compute Unit), 160 GB of storage space, 32-bit framework.”

Large Instance: The large instance depicts “a framework with 7.5 GB of memory, 4 EC2 Compute Units (2 virtual cores with 2 EC2 Compute Units each), 850 GB of storage space, 64-bit framework.”

Extra Large Instance: The extra-large occurrence offers “what might as well be called a framework with 15 GB of memory, 8 EC2 Compute Units (4 virtual cores with 2 EC2 Compute Units each), 1690 GB of storage space, 64-bit framework.”

Amazon charges customers in two primary ways:

Hourly cost/VM.

Information exchange cost.

The hourly VM rate is arrived at in view of the limit and enhancements of the VM. Amazon publicizes the evaluation plan as “pay for resources you consume.”

Clients can begin and stop VMs to manage costs without much trouble, with Amazon estimating with hourly granularity. Few are ready to keep each virtual machine running close to the limit and pay just for CPU time really used.

FlexiScale: This is a UK-based CSP that offers services which are equivalent to Amazon Web Services. The virtual servers of this cloud provider offer features such as persistent storage by default, dedicated VLAN, fixed IP address, runtime adjustment of CPU, and a wider range of server sizes. FlexiScale cloud services are also priced by the hour.

In the current scenario in the UK, FlexiScale cloud is providing services such as Web service (SOAP), access to virtual server through SSH (Linux), web-based user interfaces, Remote Desktop (Windows), per hour pricing, automatic scaling, and in case of hardware failure, automatic recovery of VMs as per SLA.

GoGrid: 2Similar to other IaaS CSPs, GoGrid permits its clients to use a wide range of Windows and Linux images, with a scope of fixed instance sizes. GoGrid provides the services like “value-added” stacks, which are prioritized more for various applications like e-commerce, web hosting and database services.

It also provides a new feature which makes it easier for customers to combine traditional dedicated hosts with the autoscaling infrastructure facility. Customers can take the benefits of dedicated hosting combined with on-demand cloud infrastructure, which leads to the user getting the advantages of each paradigm of computation.

Rackspace Cloud: 3Rackspace provides infrastructure service that offers fixed instances of VMs in the cloud. Rackspace provides a wide scope of pre-made Linux-based images. In this cloud, RAM is measured per user-requested images. Like GoGrid, Rackspace servers combine dedicated hosts with cloud infrastructure to facilitate the customers accessing all of the features of automated cloud computing. It offers advantages such as enabling static (fixed) IP address, load balancing, and persistent storage.

Aneka: 4the Aneka [16] cloud is an example of PaaS, which is a .NET-utilized platform which supports resource management and development. Each and every server acts like a cloud node and hosts Aneka container that provides the platform consisting of security and privacy, services for persistence, and control over communication. Customers request the required resources through a client to the Aneka master node, which acts as a reservation service manager and controls all the cloud nodes. Master node has the responsibility for scheduling the requests and distributing them.

The Aneka container is capable of hosting n number of other services which could be included by the developers to get the functionalities of an Aneka node.

App Engine: 5Google App Engine lets the customers run their Python program and Java applications on the cloud infrastructures provided by Google. App Engine allows the customers to deploy their applications to scale dynamically and it supports the need for information storage scaling up and down according to the requirements of the customers. Google API (application programming interface) gives autonomous framework which has arrangement capacities and multi-tenure (fit for running numerous applications on a single framework simultaneously) engineering. The customer has the flexibility to make his own particular applications, which keep running on the supplier’s foundation. PaaS providers offer a predefined course of action of OS and application servers [6, 17-25].

Salesforce is a customer relationship management (CRM) platform, that conveys to organizations on the web utilizing the SaaS model.

Salesforce.comwas established in 1999 by the previous Oracle official Marc Benioff. In June 2004, the organization opened up to the world on the New York Stock Exchange underneath the stock image CRM. Beginning speculators in Salesforce.comwere Marc Benioff, Larry Ellison, Halsey Minor, Magdalena Yesil and Igor Sill of Geneva Venture Partners.

Salesforce is headquartered in San Francisco, California, and has home offices in Dublin, Singapore and Tokyo (covering Japan). Salesforce.comhas its services converted into 15 distinct dialects and as of now has 43,600 clients and more than 1,000,000 endorsers.

Cloud computing has become a buzzword in the current IT industry as well as in academic research, which is strongly concerned with customer involvement with cloud service providers. The main concept behind cloud computing is on-demand sharing of resources available in the resource pool, which implies new emerging and promising business models. This chapter has described different perspectives on cloud computing along with the characteristics of cloud computing. Cloud service models and cloud deployment models have also been described. In the later part of the chapter, some examples of cloud CSPs were also discussed.

1 State the basic principles of cloud computing.

2 Why is cloud computing so popular in the era of the internet? Justify your answer with an appropriate example.

3 Explain how the cloud computing environment caters to the needs of customers and providers.

4 Are the cloud deployment models based on security and privacy issues or not? Justify your answer with suitable examples.

5 Justify the following: “Cloud is more suitable for the large organizations.”

6 State some commercially available clouds for public, private and hybrid clouds.

7 State the characteristics of public cloud.

8 Are the cloud services used by the cloud user according to their requirements? Explain with suitable examples.

9 State the characteristics of private cloud.

10 How is the hybrid cloud infrastructure a combination of public and private cloud?

11 What is community cloud and how is it different from private and public clouds?

12 Give at least two examples where virtualization plays a significant role in RaaS and IaaS.

13 State the applications of PaaS and SaaS. And also give some examples of PaaS and SaaS.

14 What is IaaS? Give at least one commercially available service provider that allows the user to rent computers to run and deploy their applications.

15 Write short notes on:(a) Aneka Cloud(b) Salesforce.com(c) Google App Engine.

16 What is on-demand functionality? How is it provided in cloud computing?

17 What are the platforms used for large-scale cloud computing?

18 What are the different models for deployment in cloud computing?

19 What is the difference between cloud computing and mobile computing?

20 What is the difference between scalability and elasticity?