Cloud computing provides on-demand access to shared computing resources like networks, servers, storage, applications and services that can be rapidly provisioned with minimal management effort. It evolved from technologies like client/server, web services, grid computing and utility computing. Cloud computing offers advantages like reduced costs, flexibility, scalability and mobility compared to traditional server models. It is classified into public, private and hybrid cloud models based on their accessibility and three main service models of IaaS, PaaS and SaaS based on the level of control and customization they provide.

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CLOUD COMPUTING
Common, Location-Independent, Online Utility
On-Demand
A. Aravindan
Arun,
Sr. System Admin
Date: 11/01/2013

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Agenda
 Introduction
 Evolution of Computing
 Compare with Traditional Server
 Compare with Virtualization Server
 Cloud Computing Advantages / Benefits
 Cloud Computing Types
 Service Models
 Summary

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Evolution of Computing
Client / Server - Distributed
Web Services – Internet Technology
Grid Computing – HPC
Utility Computing – Metered
Service
Cloud Computing
Next Generation
Mainframe –
Centralized

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Introduction
Cloud is Internet-based computing, whereby
shared computing resources (e.g., networks,
servers, storage, application and other
services) that can be rapidly provisioned and
released with minimal management effect.

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The Traditional Server Concept
Pros
 Easy to conceptualize
 Fairly easy to deploy
 Easy to backup
 Virtually any
application/service can be
run from this type of
setup
Cons
 Expensive to acquire and
maintain hardware
 Not very scalable
 Difficult to replicate
 Redundancy is difficult to
implement
 Vulnerable to hardware
outages
 In many cases, processor
is under-utilized

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The Traditional Virtualization Concept
Pros
 Resource pooling
 Highly redundant
 Highly available
 Rapidly deploy new
servers
 Easy to deploy
 Reconfigurable while
services are running
 Optimizes physical
resources by doing more
with less
Cons
 Slightly harder to
conceptualize
 Slightly more costly (must
buy hardware, OS, Apps,
and so on...)
 Difficult auto scaling

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Technologies for Agility
 Virtualization
The ability to run multiple Operating System on
single physical system and share the underlying
hardware resources.
 Utility Computing
Offering computing resources as a metered service

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Cloud Computing Framework

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Cloud Computing Advantages
 On Demand Services
 Speed of Delivery
 Cost / Benefit ratio
 Software as a Subscription
 Reduced Software Maintenance
 Increased Scalability
 Elastic Nature
 User have full control over their instance

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Benefits
 Lower total cost operations (Pay-As-You-Go)
 Save Infrastructure setup & Maintenance
 Rapid, Request-driven provisioning
 Easy monitoring, managing & reports
 Storage and Retrieval of data
 Uninterrupted and Persistent Data Storage
 High Availability
 Automated and even distribution of traffic
 Flexible scaling of Resources

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Cloud Computing Characterized
Consumer Perspective
 Single point of access - Self services with rich user experienced
 Virtualization - Increased system utilizations
 Automation - Automated service request and fulfillment
 Agility - Rapid Services provisioning
 Flexibility - Massive scaling of IT services as
needed
 Usage Account - Utility based usage metrics
 Service Management - Modular services managed access
Infra/Platforms/application/business
stacks
 Security - Shared services delivered across trusted
domains
 Cost Efficiency - Reduced CapEx with minimal to no asset
ownership

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Cloud Computing Types
 Public Cloud
 Private Cloud
 Hybrid Cloud

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Public Cloud
 Infrastructure provisioned on-demand using
publicly available resources.
 Computing resources are provided to
customers through self-serve interface.
 Scalable computing resource on a temporary
or periodic basis.
 Ability to acquire access to highly-quality
pools of resources immediately and with
minimal capital investment.

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Public Cloud Benefits
 Reduce Infrastructre cost and maintain cost
 Rapidly increase on-demand services,
storage capacity and other need
 Public cloud available anywhere, anytime
 Scalable to meet individal or company needs
 High redundancy and available

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Private Cloud
 Private cloud avail within the corporate
firewall using their own hardware.
 Flexible to organization needs.
 The Cloud architecture is dedicated to the
organization and is not shared with other
organization.

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Private Cloud Benefits
 Data will be safe and secure
 Scalable Bandwidth Access
 Suitable and highly support SLA
 Reliability

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Hybrid Cloud
 Hybrid Cloud = Private Cloud + Public Cloud
 Private cloud can extends their boundaries to
access additional computing resources in the
public cloud using secure communication
(VPN).

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Hybrid Cloud Benefits
 Flexible computing resources
 Continued reduction of cost expenses
 Improved resource utilization and more
efficient system

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Community Cloud
 A Cloud infrastructure that is shared by
several organizations
 Often delivered securely via private network.
 Ability to bill the organization separately.
 Shared SLA's

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Service Delivery Models
 Infrastructure as a Service (IaaS)
 Platform as a Service (PaaS)
 Software as a Service (Iaas)

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Service Delivery Models
Source: Cloud Computing Use Cases, a white paper produced by the Cloud Computing Use Case
Discussion Group, Version 2.0, 30 October 2009

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Services Delivery Models
 Infrastructure as a Service (IaaS)
Consumer can utilize “Fundamental Computing
Resources” such as Processing Unit, Storage,
Networking and Operating System.
Consumer can control the operating system,
Storage, Application.

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IaaS Benefits
 Low IT Capital Investment and on-going
operation Cost
 Shorter delivery time and Fully scalable
 Higher Level of Value-added services
 Reduces Maintenance, Monitoring and
Management cost
 Easy to Manage

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Services Categories
 Platform as a Service (PaaS)
– Allows users to create their own cloud based
application using provider specific API's and/or
libraries.

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PaaS Benefits
 Low Infrastructure & Lower Risk
 Lightweight development IDE
 Easy and quick deployment
 Reusable code and business logic
 Integration with other web services
 Centralized information management
 Secured and customized access
 Easy Collaboration

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Services Categories
 Software as a Service (SaaS)
– Consumers purchase the ability to access
and use an application or service that is
hosted in the cloud.

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SaaS Benefits
 Shorter deployment time
 Global Availability
 Easier upgrades
 Lower Initial costs
 High Adoption

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Cloud Security
Claims Based Authentication
A trusted authority (Issuer) issues a signed
security
Token containing a set of claims (credentials) which is
given to the application for validation.
The application will authenticate the user if the
security token is valid and signed by a trusted issuer

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Cloud of the future is an ecosystem
Source: Cloud Computing Use Cases, a white paper produced by the Cloud Computing Use Case
Discussion Group, Version 2.0, 30 October 2009

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Benefits & Summary
 Reduced Costs
 Easy to take snapshot – Storage, Instance
 Highly Automation
 Flexibility
 More Mobility
 Management Automation
 Lower Maintenance Cost
 Deploy Project Faster
 Scale as needed
 Location independent