Virtualization-the cloud enabler

Pravin Hanchinalpravinhanchinal.com

How I saw Cloud first time?

How was cloud computing so far?

How ahead?

What is Virtualization?

Virtualization is the ability to run "virtual machines" on top of a "hypervisor“

The Cloud Computing Adoption Model

Virtualization and Cloud Computing

• Virtualization is the ability to run "virtual machines" on top of a "hypervisor“

• A hypervisor provides a uniform abstraction of the underlying physical machine.

• Abstraction in the key idea in Service Models of Cloud!

Timeline of Virtualization

• 1970s: virtual machines first used

• 1990s: x86 becomes prominent server platform

• 1999: VMWare first product to virtualize x86

• 2006: AMD and Intel offer hardware support

Benefits of Virtualization

• Greatest Cost Savings• Highest Server Utilization• Built-In High Availability• Zero Downtime Failover• Best Performance• Unmatched Reliability• Superior Security• Lowest TCO• Fastest, Easiest Management

* Image soruce: http://whitehatvirtual.com/blog/bid/334816/Top-5-Benefits-of-Desktop-Virtualization

Waste! Waste!! Waste!!!

Imagine a nameserver doing the following:

What is a Virtual Machine (VM)?

• A virtual machine (VM) is a software implementation of a machine that executes programs like a physical machine.

• Each VM includes its own kernel, OS, supporting libraries and apps.

What VM does?

It just behaves like one - but it is not!

Some scenarios

The desktop user who wants to run a copy of Windows on his Linux computer running simultaneously

Some scenarios

A cost controller who wants to substitute 17 idling real machines with a multiprocessor machine and 17 virtual machines running on it.(Codenvy / Cloud9 IDE)

Some scenarios

A system architect wanting to run 3 different server OS on one machine or a cluster

Some scenarios

A programmer who wants to test his programs on a platform the customer is using. (Genymotion)

What Virtual Machines provide?

– Hardware independence VM sees the same hardware regardless of the host hardware

– Isolation VM’s operating system is isolated from the host operating system

– Encapsulation Entire VM encapsulated into a single file

Virtual Machines Classification

Process virtual machine ● designed to run a single program, which means

that it supports a single process● E.g. JVM, Dalvik,..

System virtual machine ● provides a complete system platform which

supports the execution of a complete operating system (OS)

● E.g. VirtualBox, Parallels Workstation, Xen,..

Process Virtual Machine

•

System Virtual Machine

•

Architecture viewpoint differences

1. Traditional

2. Hosted virtualization

3. Bare-metal virtualization

Makes sense?

How to implement VM?

Native/ Bare Metal Hosted

VMM / Hypervisor

▪ VMM: Virtual Machine Monitor▪ Small special purpose operating system✓ Each process acts like a separate computer or VM✓ Can run a full OS in each virtual machine

Types of hypervisors (VMM)

• Type 1 (or native, bare metal) – run directly on the host's hardware to

control the hardware and to manage guest OS.

• Type 2 (or hosted) – run within a conventional operating

system environment.

Type 1 (or native, bare metal) hypervisor

Type 2 (or hosted) hypervisor

How to execute guest instructions on a host?

Interpretation(emulation)

Slow execution speed, but easy implementation

Translation

Dynamic translation (JIT): translation while running

Static translation (AOT): multiple binary problemComplicated but faster execution, especially with optimizations

Run directly on the hardware

When the host and guest ISA are binary compatible

VMotion: Live Migration

VMWare Workstation in action

Pros and Cons

Pros:SandboxHardware independentOS independentFast RecoveryLive BackupMigrate dataReduced HardwareRun Multiple OS SimultaneouslyCost savingsUse of Multicore processorsSystem SecurityTest and Development

Cons:Less EfficientUnstable PerformanceTools lack abilityRapid DeploymentLatency of Virtual DiskBackup and Data SetsSecurity IssuesHardware compatibility issuesManaging and Securing is difficult

Virtualization Enterprise Perspective

Reduced cost–Improve server utilization–Reduce hardware costs–Reduce power consumption

Agility–Operational scalability–Rapid provisioning

Security–Isolated Systems

The Future?

Enough! Let's see in Action

Source: http://www.crackerjackann.net/blog/is-a-lack-of-leads-frustrating-you

Thank you

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Useful Resources

http://inspiregroups.co.in/our-blogs/cloud-computing/

https://www.youtube.com/watch?v=3j3f5l2La7I

http://www.citrix.com/products/xenserver/overview.html

http://www.zdnet.com/virtualisation-suites-compared-7000001456/

http://wiki.xenproject.org/wiki/Xen_Beginners_Guide