98546470 Cloud Computing and Virtualization

8/11/2019 98546470 Cloud Computing and Virtualization

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Cloud Computing & Virtualization

Prepared By:

Er.Priyanka aggarwal

M.Tech CSE


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Cloud + Computing

Computing is use ofcomputer technonogy.

.

Cloud is simply a

metaphor for the internet


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Grid computing is the

application of several

computers to a single

problem at the same time

-usually to a scientific or

technical problem that

requires a great numberof computer processing

cycles or access to large

amounts of data.

A type of computing in

which different components

and objects comprising anapplication can be located

on different computers

connected to a network.

Grid Computing + Distributed

Computing = Cloud computing
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Cloud Computing

Cloud computing is style of computing in whichdynamically scalable and often virtualized resources

are provided as a service over the internet .

Cloud computing is Internet-based computing,whereby shared resources, software andinformation, are provided to computers and devices

on-demand, like the electricity grid.

Cloud computing is a pay-per-use model for enablingavailable, convenient, on-demand network access toa shared pool of configurable computing resources.


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Benefits Of Cloud Computing

No up-front investment:

Cloud computing uses a pay-as-you-go pricing model. A

service provider does not need to invest in theinfrastructure to start gaining benefit from cloudcomputing. It simply rents resources from the cloudaccording to its own needs and pay for the usage.

Lower ing operat ing cost:

Resources in a cloud environment can be rapidlyallocated and de-allocated on demand.Hence, a serviceprovider no longer needs to provision capacitiesaccording to the peak load. This provides huge savingssince resources can be released to save on operating

costs when service demand is low.


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Architecture Design Of Cloud

Computing


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Delivery Models

Three delivery models:

Software as a Service.

Platform as a Service. Infrastructure as a Service.

Software-as-a-Service (SaaS):

SaaS refers to providing on demand applications over the InternetThis is a pay-as-you-go model and was initially widely deployed for

sales force automation and Customer Relationship Management(CRM).

Examples of SaaS providers include:

Salesforce.com

Rackspace.

SAP Business ByDesign.


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Delivery Models

Platform-as-a-Service (PaaS):

Platform as a service,another SAAS, this kind of cloudcomputing provide development environment as a service.Itprovides platform layer resources, including operating systemsupport and software development frameworks.

Examples of PaaS providers include:

Google App Engine. Microsoft Windows Azure

Force.com.


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Delivery Models

Infrastructure-as-a-Service (IaaS):

Infrastructure as a service delivers a platform virtualization

environment as a service. Rather than purchasing servers,software,data center space or network equipment, clients instead

buy those resources as a fully outsourced service. The cloud owner

who offers IaaS is called an IaaS provider.

Examples of IaaS providers include:

Amazon EC2

GoGrid

Flexiscale.


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How Cloud Computing works?


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Layers in Architecture Design

The architecture of a cloud computing

environment can be divided into 4 layers:

Hardware/datacenter layer.

Infrastructure layer. Platform layer.

Application layer.


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Hardware Layer

Hardware/datacenter layer:

The hardware layer is typically implemented in data centers. A

data center usually contains thousands of servers that areorganized in racks and interconnected through switches,routers or other fabrics.

Responsibilities of this layer:

managing the physical resources of the cloud, includingphysical servers, routers, switches, power and cooling systems.

Issues at hardware layer:

hardware configuration, fault tolerance,traffic management,power and cooling resource management.


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Infrastructure Layer

Also known as the virtualizationlayer.

Responsibility:

The infrastructure layer creates a pool of storage and

computing resources by partitioning the physical

resources using virtualization technologies such as

Xen,KVM and VMware.

The infrastructure layer is an essential component of

cloud computing, since many key features, such as

dynamic resource assignment, are only made available

through virtualization technologies.


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Platform Layer

Built on top of the infrastructure layer, the platform layerconsists of operating systems and application frameworks.

The purpose of the platform layer:

To minimize the burden of deploying applications directly intoVM containers. For example, Google App Engine operates atthe platform layer to provide API support for implementingstorage, database and business logic of typical webapplications.


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Application Layer

At the highest level of the hierarchy, the application

layer consists of the actual cloud applications.

Cloud applications can leverage the automatic-

scaling feature to achieve better performance,

availability and lower operating cost.


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Business model of Cloud Computing


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Business Model

According to the layered architecture of cloud computing,it is

entirely possible that a PaaS provider runs its cloud on top ofan IaaS providerscloud. However, in the current practice, IaaSand PaaS providers are often parts of the same organization(e.g., Google and Salesforce).

This is why PaaS and IaaS providers are often called theinfrastruc ture pro viders or cloud providers.


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The Traditional Server Concept

20

Web Server

Windows

IIS

App Server

Linux

Glassfish

DB Server

Linux

MySQL

EMail

Windows

Exchange


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Key Technology: Virtualization

Hardware

Operating System

App App App

Traditional Stack

Hardware

OS

App App App

Hypervisor

OS OS

Virtualized Stack


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Cloud computing takes

virtualization to the next step

You dont have to own the hardware

You rent it as needed from a cloud

There are public cloudse.g. Amazon EC2, and now many others

(Microsoft, IBM, Sun, and others ...)

A company can create a private one

With more control over security, etc.


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Cloud Computing Status

Seems to be rapidly becoming a mainstream practice

Numerous providers

Amazon EC2 imitators ...

Just about every major industry name

IBM, Sun, Microsoft, ...

Major buzz at industry meetings


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So Whats the Take-Away?

There seems to be a major revolution underway in how we manage

hardware

Specify(machine per service or one big machine with many

virtual servers

Purchase(own it yourself or rent from a public cloud)

Use (always-on, or flexible provisioning as needed ...)


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What About Research?

The EucalyptusProject

From University of California Santa Barbara

An open source collection of tools to build your own cloud

Linux using Xen for virtualization

An apparently open research area: handl ing data

Regular databases apparently don't scale wellEspecially hard to make elastic (scale up / scale down


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Major Service Providers Of Cloud

Computing


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Conclusion

Cloud computing is the next big wave in computing.

It has many benefits, such as better hardware management,since all the computers are the same and run the same

hardware.

It also provides for better and easier management of data

security, since all the data is located on a central server, soadministrators can control who has and doesn't have access

to the files.


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TH NKS

Documents

98546470 Cloud Computing and Virtualization