This slide introduces to concept on virtualisation in Computers. Deals about why is it needed. What is it ? What are common virtualisation Sloution.

1. Rahul Krishna Upadhyaya
30/8/2013
PyCon India [ 30th Aug , 2013 ]

2.  Hi, I am Rahul.
 Today I am here on Behalf of “Openstack
India User Group” to Introduce you to this
amazing technology calledOpenstack.

3. What about the Basics ?

4. A brief Introduction

5. Hence we Understand:Virtualization is a very broad concept, which is certainly
applicable to so many aspects of computing.
The earliest uses of virtualization include the CompatibleTime Sharing System (CTSS)
developed by the Massachusetts Institute ofTechnology (MIT) on the IBM 704 in 1968

8. • There is a new version of this new OS, I want to
try it out.
• Specific application/Libraries available for a
specific OS.
• Using Snapshots to revert back to stable states
• Excellent to test risky/buggy stuff.
• Because I find it cool to virtualize stuff ! :P .
• Blah blah blah…. (many Justified and
unjustified reasons)

9. Effieciency
Flexibility
Virtualization ==

10.  So how was it like before ?
 What was the problem and why was there a
need for virtualization ?

12.  Manageability ?
 Reliability ?
 Portability ?

14. At an Average around 70% of Operational Costs of a Datacenter attributes to Power
and Cooling

15.  Optimum Utilization of Resources
 Cost of Power and Space.
 Ease of manageability.
 Easier Backups.
 Faster Deployments.
 Easy to relocate.
 A whole lot flexibility.
 + countless benefits.

17. A hypervisor or virtual machine manager (VMM) is a piece
of computer software, firmware or hardware that creates
and runs virtual machines.
The hypervisor presents the guest operating systems with
a virtual operating platform and manages the execution of
the guest operating systems

19. Mapping of Resources in from the Hypervisor to the host
resources.

21.  Abstraction of the Hardware Interfaces by
providing the multiple virtual interfaces and
mapping it to single Interface.
 Similarly the concept to soft-switches. Ex
OpenvSwitch.

24.  Where X=
▪ Infrastructure
▪ Network
▪ Identity
▪ Storage
▪ Software
▪ Platform
▪ Firewall
▪ Load-Balancer
▪ Email, etc,etc,…
So, X is a variable, which an infinite List.

26. Anything as a service is a model of cloud based delivery.Where the person
is abstracted from the underlying layer and has a hypothetical unlimited
supply of the service being provided.

27. Cloud computing is the use of computing resources
(hardware and software) that are delivered as a ON-DEMAND
service over a network (typically the Internet).The name
comes from the use of a cloud-shaped symbol as an
abstraction for the complex infrastructure it contains in
system diagrams

28.  It is an on–Demand Service.
 User doesn’t know (he’s abstracted from where
the service resides)
 User doesn’t maintain.
 User Pays for as much as he uses. !
 User has hypothetical inifite “value” of the
service he is using.

29. A very similar example in other domain which you could compare to could be
electricity department.
AfterYou build your house,You can generate your own electricity
depending on your usage and buying/setting up a Generator that could sustain
your needs.
Alternately ,You could avoid it and the maintenance and the running
cost, and all the other hassles associated with it by taking “electricity-as-a-
service” from any vendor. Pay him for the amount that you use.

30.  Brings down initial Investment by loads.
 No bothering of maintenance, support and
upgrades.

31.  Scalability : Hypothetically… infinitely elastic.
 Agile – In deployment
 Application programming interface (API) :
based Interaction.
 Cost : setup and operational expenses very low.
 Location Independence : Provides ease of use
 Fault-tolerence : as the infrastructure can be
geographically scattered. Better for disaster
recovery.

32.  Multitenancy : having multiple customers (centralization) ,
still making sure they have their own address space and
privacy.
 Security : Security is a major concern when you have multi-
tenancy.
 Metering and Billing : It is needed according to the - Pay for
what you use – UseCase.

33.  Public : Ex HP Cloud, Amazon , Rackspace
 Private : VcloudDirector, Rackspace, etc.
 Hybrid : ??? (when and where do we need it)

34.  Ability of a cloud to provision (create
VMs) into the other compatible Clouds
 This is where cloud-interoperability
comes into picture

35. The Base Level Node : Single “Host” server in a big cloud.

37. The above example refers to Openstack Components : Other clouds too
would have similar building blocks and interactions.

39.  Wikipedia : for definitions
 IBM Developerworks : For diagrams.