Cloud Computing basic

Let’s understand the cloud and understand why should we

understand?

Disclaimer: I have not used anybody’s objectionable contents. Wherever usedI have given reference.

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Agenda

• So that– We make our own understanding of cloud– we never discuss the question again

• So that we discuss questions (with quality) like– What are possible research / business in cloud– How to they provide / implement security

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Self Service Slide {SSS-30S}

– Standard defintion

• 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 service provider interaction.

• This cloud model promotes availability and is composed of five essential characteristics, three service models, and four deployment models.

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Lets break it: Cloud is a model…• Which enables access to computing resources

– Convenient– On demand and network access

• computing resources can be– Readily provisioned– Readily released

• With– Minimal management efforts

• Without– Service Provider Interaction

• Should focus/promote– Availability

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What we need to mug up!

• 5 Essential Characteristics• 4 deployment Models• 3 Service Models

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Characteristics

• On Demand Self Service• Resource Pooling• Rapid Elasticity• Broad Network Access• Measured Service– Metering/monitoring tools

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Just Imagine• Develop a B2B networking site and now if needs to be

served– Order server– Install server in the data center– Provision an IP address for the server– Set up the DNS– Install OS– Hire a Administrator if Linux – -– -– - forgot – u need space to keep that server ! And you know

the prices for office space

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Use heroku• Ruby cloud platform as a service• You need ruby and git on your computer• Your application need to be in ruby.• We need to install command line tool from

heroku• gem install heroku• You are ready to go.• Suppose application name is “test”– test.heroku.com

• On demand self service

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Service Models

• Cloud Software as a Service {SaaS}• Cloud Platform as a Service {PaaS}• Cloud Infrastructure as a Service {IaaS}

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Software as a service

• Google Docs• Microsoft Web Apps 2010• Zoho

infrastructure

Servers

Network Connections

Platform

Java

Javascript

Software

Google Docs

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Platform as a service• Heroku• Google app Engine• Engine Yard

infrastructure

Servers

Network Connections

Platform

Ruby on rails

PostgresSQL

Software

YOUR APPLICATION

Linux

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Infrastructure as a Service• Rackspace• Gogrid

infrastructure

Servers

Network Connections

Platform

Your PL

Your DB

Software

YOUR APPLICATION

Your OS

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Deployment Models

• Public Cloud• Community Cloud– Made available to certain group or association

• Private Cloud– Made available at only one particular association

• Hybrid Cloud

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Public Cloud

• A public cloud is a cloud made available to the general public for use

• is the most common type of cloud• Users of a public cloud sign up with the cloud

provider• make payments based on the provider's

pricing schema• Amazon Web Services, Google applications

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Hybrid cloud

infrastructure

Servers

Network Connections

Platform

Ruby on rails

Linux

Software

Some application (Redmine)

Public Cloud

Private CloudPlatform

MYSQL

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Lets review

• Two things were developing together– network– Emulation

• Network became internet, web and web 2.0• Emulation also became intelligent and called

virtualization• And then they combined.

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Main Frames

P.C. Network

More Powerful PC/Emulation

Yet More Powerful P.C. / Virtualization

LAN/WAN/Wireless

Web/Grid/Clusters

Cloud

time

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What is cloud• Email service is cloud

– Software as a service– Provider needed only folders to represent users– Idea was caught early as it was file system + web interface

client server

Email protocolBackend

user1

User n

• Google docs, office live are just rich web 2.0 applications / SaaS

– Salesforce.com started the same in CRM1818

What’s new then?

• For example Heroku {yes I am repeating}– Ruby cloud platform as a service– You need ruby and git on your computer– Your application need to be in ruby.– We need to install command line tool from heroku– gem install heroku– You are ready to go.– Suppose application name is “test”• test.heroku.com

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Hmm..• I already g0t a online development tools• I already g0t the free web hosting• Then what’s new?– YES. Nothing: they are combined now intelligently– Added the characteristics as described earlier

• Its possible because of virtualization• And if combined with power of data centers• And Streaming over HTTP like YouTube

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So what’s the conclusion• I tried to simplify/put in different context the definition

of cloud computing so system programmers who programmed very less either on web or virtualization can understand

• Software as a service– A innovative web 2.0 application / software through web

• Platform as a service– Preconfigured virtual machine with web interface and if

output is required on web – a URL• Infrastructure as a service– Non configured VM [empty virtual hard disk] with web

interface to configure it also.

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PaaS

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Virtual Machine with Windows XP/Required

Tools to Develop

Interface to

Control VMs

client ServerWeb Interface

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IaaS

Virtual Machine with Empty Hard disk

Interface to

Control VMs

client ServerWeb Interface

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So. I want…

• People can learn driver programming on the web using some website learnwindriver.domain.com or learnlinuxdrivers.domain.com or

• In this case we are providing platform as a service– Student need to write own driver and test– What matters how we give him the interface

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Then cloud, grid ?

• Aren’t the same or related?• We understood cloud, ok revisit the Grid once.• In a grid computing system, networked

computers are able to access and use the resources of every other computer on the network.

• So Grid is actually making the backend of cloud to provide the scalability

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Client ServerWeb Interface

Virtual Machines

Virtualization Infrastructure

Virtual Machines

Virtual Machines

GRID

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Virtualization

Web ServicesSLAs

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Another Point of View

ThinClient

Terminal Server

Good Amt of Storage

ClusteringLAN Interface

Not So Thin

Client

Web Server

Too Good

Amt of Storage

Clustering

Web Interface

Virtualization

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We understand

this

This is cloud

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Of course• Without much innovative effort we can become a

cloud provider who provides infrastructure as a service

• Innovation is required in maintaining huge number of customers and performance– So this can be moved to data center with high storage

capacity– Computing can be done in the grid– GRID can not be claimed as equivalent to IaaS

• Now from here this become complex • So I will finish.

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References

• Copy from Rosalyn Metz blog – initial slides• Discussions• Many more forgotten heroes (links)• Please Read this because I have not used this– IaaS, PaaS, and the Windows Azure Platform.pdf

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• http://www.thewhir.com/web-hosting-news/010809_Salesforce_Outage_Draws_Cloud_Criticism

• http://www.eucalyptus.com/resources/info/cloud-myths-dispelled

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