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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