The document provides an overview of cloud computing, detailing its essential characteristics, service models (SaaS, PaaS, IaaS), and deployment models (public, private, hybrid). It emphasizes the convenience and efficiency of accessing shared computing resources on-demand while discussing examples such as Heroku and Google Docs. The content also explores the relationship between cloud computing and grid computing, highlighting their functionalities and roles in modern technology.

1. Let’s understand the cloud and understand why should we understand? Disclaimer: I have not used anybody’s objectionable contents. Wherever used I have given reference.

2. 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

3. 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.

4. 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

5. What we need to mug up! 5 Essential Characteristics 4 deployment Models 3 Service Models

6. Characteristics On Demand Self Service Resource Pooling Rapid Elasticity Broad Network Access Measured Service Metering/monitoring tools

7. 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

8. 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

9. Service Models Cloud Software as a Service {SaaS} Cloud Platform as a Service {PaaS} Cloud Infrastructure as a Service {IaaS}

10. Software as a service Google Docs Microsoft Web Apps 2010 Zoho infrastructure Servers Network Connections Platform Java Javascript Software Google Docs

11. Platform as a service Heroku Google app Engine Engine Yard infrastructure Servers Network Connections Platform Ruby on rails PostgresSQL Software YOUR APPLICATION Linux

12. Infrastructure as a Service Rackspace Gogrid infrastructure Servers Network Connections Platform Your PL Your DB Software YOUR APPLICATION Your OS C-DAC Hyderabad

13. Deployment Models Public Cloud Community Cloud Made available to certain group or association Private Cloud Made available at only one particular association Hybrid Cloud

14. 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

15. Hybrid cloud infrastructure Servers Network Connections Platform Ruby on rails Linux Software Some application (Redmine) Public Cloud Private Cloud Platform MYSQL

16. 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.

17. Main Frames P.C. Network More Powerful PC/Emulation Yet More Powerful P.C. / Virtualization LAN/WAN/Wireless Web/Grid/Clusters Cloud time

18. 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 protocol Backend user1 User n Google docs, office live are just rich web 2.0 applications / SaaS Salesforce.com started the same in CRM

19. 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

20. 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

21. 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.

22. PaaS Virtual Machine with Windows XP/Required Tools to Develop Interface to Control VMs client Server Web Interface

23. IaaS Virtual Machine with Empty Hard disk Interface to Control VMs client Server Web Interface

24. 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

25. 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

26. Client Server Web Interface Virtual Machines Virtualization Infrastructure Virtual Machines Virtual Machines GRID

27. Virtualization Web Services SLAs

28. Another Point of View Thin Client Terminal Server Good Amt of Storage Clustering LAN Interface Not So Thin Client Web Server Too Good Amt of Storage Clustering Web Interface Virtualization We understand this This is cloud

29. 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.

30. 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

31. http://www.thewhir.com/web-hosting-news/010809_Salesforce_Outage_Draws_Cloud_Criticism http://www.eucalyptus.com/resources/info/cloud-myths-dispelled