Understanding VM Technology

Please tell me in easy language since do not understand bookish or internet material.

What is in VM mean:- V center, V sphere, DRS, VMOTION. How this help in case AD and EXCHANGE Crash, I think VMOTION is moving from one host to another then what is a procedure in server crash.I do not want how they install, I need to know the terms operation in VM. What are terms mentioned have there advantages.
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kunalclkAsked:
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
VM - Virtual Machine.

vSphere - VMware virtualisation Brand.

VMware vSphere vCenter Server - VMware's Management Server for managing VMware Host Servers.

See here
http://www.vmware.com/products/vcenter-server/overview.html

VMware DRS
Load Balance VMware Host Servers.

http://www.vmware.com/products/drs/overview.html

VMware vMotion
the ability to migrate a Virtual Machine from one server to another in realtime with NO DOWNTIME.

http://www.vmware.com/products/vmotion/overview.html
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Brian PiercePhotographerCommented:
A VM is a virtual Machine - software is used to mimic an real machine, this means that you have have multiple virtual machines running on a single real machine.
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kunalclkAuthor Commented:
I know VMWARE what am I asking are the advantages of DRS VSPHERE, VCenter etc. Basicaly why are they used.
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Leon FesterSenior Solutions ArchitectCommented:
So what you want is to know how to use these tools in a disasters.
Sadly though, these are not disaster recovery tools.
To recover from AD and Exchange failing you should at least backup your Domain Controller and backup your Exchange databases.

Exchange Server disaster recovery options
http://technet.microsoft.com/en-us/library/dd876874.aspx

Active Directory disaster recovery options
http://windocuments.net/activedirectorydisasterrecovery.html

With these two technologies, you need to first plan, build and document the recover process.
Each method that you use has it's own issues and benefits.
Without knowing your infrastructure setup, capital investment or available technologies and not forgetting your own technical abilities, it is very hard to give you a point by point instruction of what or how to do it.
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
vCenter is the Management Server, it's used to manage multiple VMware Host Servers, without it you cannot do vMotion, DRS, HA, Templates, CLONE, Alerts.

DRS is used to Automatically Load Balance your Cluster, VMs are moved automatically from host to host, to distribute the load (resources CPU and Memory) across the cluster.
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kunalclkAuthor Commented:
Thanks
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