Cloud Computing Introduction

Introduction to Cloud Computing

2
Let's list pro / cons
•
Own bike / Car and you drive yourself ?

Complete Independence

Expensive and hard to maintain – petrol, oil, air, …..
•
Bike/Car pool with your friend ?

No need to drive by yourself , friend maintains the vehicle

Dependent on your friend
•
You take a lift from a stranger ?

No guarantee of reaching to MZOS
•
You use public transport eg: PMT, tum-tum

Least expensive and zero maintenance

Least privacy

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Challenge : Expenditure on Data Centers and human resources
– Physical Infrastructure, Security
– Power, Cooling, Cabling, Fire Safety
– Resource utilization
Data centers are notoriously underutilized, often idle 85% of the
time: Reasons -
– Over provisioning
– Insufficient capacity planning and sizing
Industry faces similar challenge as you do !
Industry faces a similar challge
O nly this tim e challe ng e is to run the co m pany sm o o thly !

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The solution
What is Cloud Computing?
From 'wikipedia' -
– Cloud computing is a style of computing in which dynamically scalable and often
virtualized resources are provided as a service over the Internet. Users need not
have knowledge of, expertise in, or control over the technology infrastructure in
the "cloud" that supports them
Single sentence definitions :-)
– “Cloud Computing” is providing computing and storage resources
as a service.
– “Cloud Computing” is using IT infrastructure as a service
Roughly, it describes highly scalable computing resources provided as an external service via the internet on a pay-as-you-go basis.

5
What is a Cloud?
Individuals Corporations Non-Commercial
Cloud Middle Ware
Storage
Provisioning
OS
Provisioning
Network
Provisioning
Service(apps)
Provisioning
SLA(monitor),
Security, Billing,
Payment
Services Storage Network OS
Resources

6
Why the word 'Cloud'?
The solutionThe solutionThe solutionThe solution
The 'cloud' is a metaphor for
the Internet
The name is derived from its
common depiction in network
diagrams as a cloud outline.

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Why use Cloud Computing
Stop bothering about Infrastructure: No need to
spend time on deciding on the best infrastructure
and designing data centre. A web browser gets you
access to the infrastructure.
Stop bothering about Software Licenses: Licensing
and associated license compliance taken care by
cloud vendor.
Open Standards based: Internet standards and web
services fuel the cloud.
Quick deployment: Ease of provisioning / de-
provisioning
Flexibility: Scale up and down as required.
Flexibility to choose applications/services based on
your need without any vendor lock-ins

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Cloud computing -
Characteristics
 Agility – On demand computing infrastructure
 Linearly scalable – challenge
 Reliability and fault tolerance
 Self healing – Hot backups, etc
 SLA driven – Policies on how quickly requests are processed
 Multi-tenancy – Several customers share infrastructure, without
compromising privacy and security of each of the customer’s data
 Service-oriented – compose applications out of loosely coupled
services. One service failure will not disrupt other services. Expose
these services as API’s
 Virtualized – decoupled from underlying hardware. Multiple
applications can run in one computer
 Data, Data, Data
 Distributing, partitioning, security, and synchronization

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Cloud Computing – Key Technology
Elements
Virtualization
– Server Virtualization (Hypervisors, LPARs)
– Storage Virtualization
– Network Virtualization
Infrastructure Management
– Automated Provisioning
– Self-service portal (Add/Remove,Start/Stop servers)
Workload Management
– Resource Reservation & Resource Scheduling
The key to dynamic infrastructure services are the virtualization environment
and its management.
The combination of these ensures that resources in a data center are efficiently
managed and can be provisioned, deployed and configured rapidly

10
Cloud Computing – Anatomy
Software as a Service (SaaS)
Gmail, GoogleCalender
Payroll, HR, CRM etc
Sugarm CRM, IBM Lotus Live
Platform as a Service (PaaS)
Middleware, Intergation, Messaging,
Information, connectivity etc
AWS, IBM Virtual images, Boomi,
CastIron, Google Appengine
Infrastructure as a Service (IaaS)
IBM Blue house, VMWare, Amazon
EC2, Microsoft Azure Platform, Sun
Parascale and more

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Cloud Computing – Models / Flavours
Public/External Clouds
Public clouds expose
services to customers,
businesses and
consumers on the
Internet.
Private/Internal Clouds
A private cloud provides
services to only one
client.
Hybrid Clouds
Combination of both
public and private clouds

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Cloud computing - issues
 Governance
 Security, Privacy and control
 SLA guarantees
 Ownership and control
 Compliance and auditing
 Sarbanes and Oxley Act
 Reliability
 Good service provider with 99.999% availability
 Cloud independence – Vendor lockin?
 Cloud provider goes out of business
 Data Security
 Cloud lockin and Loss of control
 Plan for moving data along with Cloud provider
 Cost?
 Simplicity?
 Tools
 Controls on sensitive data?
 Out of business
 Big and small
 Scalability and cost outweigh reliability for small
businesses
 Big businesses may have a problem

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What would you do to implement Cloud
Computing ?
Always Up
- even during and after upgrade, i.e no restart !
- maintain backup , restore it
Consistent Data
- data should never get corrupted
- multiple writes - multiple reads 'may' be required
Maintain privacy
- honour SLA's , privacy statements
- agree to data secrecy contracts – typically drawn before providing remote services
Anywhere Access
- think about 'all' types of devices
Mini Project Idea for Cloud Computing
- Create an email service
- Multi people chat service
- Photo sharing application

Cloud Computing Introduction

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