Cloud ComputingMay 2010

April 20, 2023

Author

A bad book is as much of a labor to write as a good one; it come as sincerely from the author’s soul.

Aldous Huxley

April 20, 2023

Mohd Aslam is Citrix Certified Administrator (CCA).

His area of experience and interest are Cloud computing, Application virtualization and XenApp administration. He has worked primarily in the domain of utilities.

His technology forte are XenApp, Application virtualization using XenApp Streaming and Microsoft App-V, C#, ASP.NET, SQL Server 2005, VB, Load Runner, QTP, Application compatibility analysis.

Author’s Introduction

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Safety Message

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Old School Computational methodology

It includes -

– Individual Servers in office or at job site

– Grid of servers

Advantages:

– More secure

Disadvantages:

– Costly – Capital and operational

– Require more maintenance

– Time Consuming

– Under utilized

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Million dollar question

How to reduce the resources like servers without reducing the overall computational power and the profitability??

How to utilize the existing computational power to its maximum capacity??

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Answer is Cloud Computing…..cloud computing solutions enable IT to be delivered as a service….

It starts with the premise that the data services and architecture should be on servers. We call it cloud computing – they should be in a ‘cloud’ somewhere. And that if you have the right kind of browser or the right kind of access, it doesn’t matter whether you have a PC or a Mac or a mobile phone or a BlackBerry or what have you – or new devices still to be developed – you can get access to the cloud…” – Dr. Eric Schmidt, Google CEO, August 2006

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Anyone with a web-based email account or a profile on a social network is already taking advantage of public cloud computing, whether they know it or not.” 

Believe it or not!!!

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Type of Clouds

Public Cloud

Private Cloud

Hybrid Cloud

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Public Cloud

Public Cloud

Firewall

Cloud maintained somewhere outside the company’s firewall/boundaries on some public domain maintained by some vendor.

Advantage:

IAAS – Infrastructure as a service SAAS – Software as a service Cost effective – Capital and operating cost

Sharing of resources Pay as you go

Electricity bill model Easy to acquire Easy to terminate

Disadvantage:

Less secure – Biggest constraint Less reliable

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Private Cloud

Private Cloud

Firewall

Confined to the company’s boundaries under firewall.

Advantage:

IAAS – Infrastructure as a service SAAS – Software as a service Highly secure

Disadvantage:

Costly in terms of initial installation and operations cost Limited computational power/capability

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Hybrid Cloud

Hybrid Cloud

Firewall

A hybrid cloud is a cloud computing environment in which an organization provides and manages some resources in-house and has others provided externally.

Example, an organization might use a public cloud service, such as Amazon's Elastic Compute Cloud (EC2) for general computing but store customer data within its own data center.

It can have advantages of both the public and private cloud models.

It can reduce the drawbacks of public cloud.

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Private in Public Cloud

Firewall

Public Cloud

VPN Connection

Private in public

Private cloud inside the public cloud by the use of VPN (Virtual private network)

The biggest advantage is it is as secure as public cloud.

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Architecture

Architecture starts when you carefully put two bricks together. There it begins.

- Ludwig Mies van der Rohe

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Cloud Computing - layers

Layers

Architecture

Application Services (services on demand) Gmail, GoogleCalender Payroll, HR, CRM etc WebEx

Platform Services (resources on demand) Middleware, Integration, Messaging,

Information, connectivity etc Amazon Web service, Google App Engine

Infrastructure as services (physical assets as services)

IBM Blue house, VMWare, Amazon EC2, Microsoft Azure Platform, Sun Parascale and more

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Cloud Architecture

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Challenges/Threats

Cyber crooks never sleep

It’s 3 a.m. — do you know where your APIs are

You can’t always trust your cloud provider’s employees

Shared technologies mean shared risk

Not backing up is not an option

Identity theft — it’s not just a consumer problem

You don’t know what you don’t know

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Where to fit Cloud??

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Technology to implement it

Cloud computing is a concept, a model

To implement it, we can use various products from:

XenApp (Citrix)

Microsoft

VMware

IBM

Google (App Engine - Google App Engine is a platform for developing and hosting web applications in Google-managed data centers)

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XenApp Architecture

XenAppApplication Server

Roaming Profile Server

User A

User B User C

User D

We

b I

CA

This XenApp is a part of some farm

in some datacenter

Database Server

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What’s next?

Application isolation virtualization

Tools for application isolation:

– Citrix Streaming

– Microsoft’s App-V

Amazon EC2

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Cloud Articles• http://blogs.zdnet.com/Hinchcliffe/?p=488&tag=btxcsim

• http://blogs.zdnet.com/Howlett/?p=558&tag=btxcsim

• http://blogs.zdnet.com/BTL/?p=9560&tag=btxcsim

• http://www.businessweek.com/technology/content/aug2008/tc2008082_445669_page_3.htm

• http://my.opera.com/blu3c4t/blog/2008/11/01/a-glance-to-cloud-computing

• http://cloudcomputing.sys-con.com/

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Thanks for your time

I find television very educating. Every time somebody turns on the set, I go into the other room and read a book.

Groucho Marx