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Faisal Reza (si_faisal)

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“... an abstraction layer that allows multiple virtual

[computers], with heterogeneous operating systems to run in

isolation, side-by-side on the same physical machine.” -

VMWare 

Multiple Operating Systems running

simultaneously

Fully isolated machines with virtual

hardware,

possibly including BIOS and different CPU

VMs appear to Host as files/processes

(approximately)

One host has many guests

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ž Server Consolidation - power savings, increased hardwareutilization

ž Disaster Recovery - live standby, full system backups, snapshotbackups

ž Development - Testing on Multiple OS Versions (Service Packs,Language Versions)

ž OS Independence - Run the OS you want while maintaing accessto the OS/applicationsDeployment Staging - test patches,upgrades, experimentation

ž Application Portability - live migration, resource scaling

ž Application Isolation – accomodate orthogonal requirements,some security benefits

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• Supports Disparate CPU Architectures

• Emulation at the CPU Instruction Level

• Tends to be slow

• Example Implementations: QEMU

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Guests must have same CPU Architecture as host.

• Host emulates hardware devices that Guest must support.

• Examples: VMWare Player,ESX, Parallels Workstation, VirtualBox

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• Requires Guest OS Modification which avoids the runtime scanning

of guest code.

• Slightly faster than Full Virtualization.

• Guest Applications do not need modification.

• Example Implementations: Xen

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• Guests must have same CPU Architecture as

host.

• Runtime scanning of Guest code unnecessary.

• Guests are unmodified.

• Hardware support must be present:

Intel VT or AMD SVM extensions

• Example Implementations: Xen HVM,VirtualBox, KVM

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• Requires host kernel modifications.• Guests share kernel.

• Containers or Jails.

• Example Implementations: OpenVZ, Linux-VServer, FreeVPS

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Proprietary Opensource

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Proprietary Opensource

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Proprietary Opensource

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Proprietary Opensource

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Virtualization Engine

ž Server Virtualization

ž Application Virtualization

ž Desktop Virtualization

ž Cluster

ž High Availability & Backup

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pve1

pve2

Vyatta

OpenfilerElastix

Windows XP

iSCSI

Master

Node

Switch

AMD Athlon II X2 240DDR II 4G

AMD Athlon II X2 240DDR II 2G

VIRTUAL PHYSICAL

LAPTOP

DEMO DIAGRAM 

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Router / Firewall Appliances

ž No Need Physical Device, Running in virtual

ž Cheap (Banget!) based on Open Networking

Hardware

Must see this whitepaper!

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NAS / SAN (Storage)

ž Scalable & Cheap Storage

ž iSCSI compatible

ž Easy Managementž Open Hardware Based

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Unified Communication Platform

ž VoIP (over existing network, VPN)

ž Video Confrence

ž Chatž Mail

ž User Management

REALLY EASY INTERFACE

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Data Center Services

Hosting Services

Virtual Private Server (VPS)

Green Data Center Approach(Few Server, Lot Service, High Utilization, Save

Electricty Energy) means SAVE MONEY

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