what is virtualization
TRANSCRIPT
Server Virtualization overview
Kotadiya DhrupeshNasit Durgesh
Prepared by
Agenda
Introduction to Virtualization and Server Virtualization
Comparing with and without virtualizationVirtual server conceptBenefit of server virtualizationLimitation of server virtualization
What is Virtualization
Server virtualization
Creates multiple isolated environmentsAllows multiple OS’s and workloads to run on the same physical hardware
Virtualization basically allows one computer to do the job of multiple computers, by sharing the resources of a single hardware across multiple environments.Version of virtualization such as hardware platform,operating system,storage device , network resources and server
virtualization.Virtualization Layer
VirtualContainer
App. A App. B
Hardware
VirtualContainer
App. C App. D
Virtualization Architecture
The Traditional Server Concept
Old Model:Traditional x86 Architecture
• Single OS image per machine• Software and hardware tightly coupled
• Multiple applications often conflict
Old model is challenging!
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Comparison between with and without virtualization
With VirtualizationWithout Virtualization
VMware provides hardware virtualization that presents a complete x86 platform to the virtual machineAllows multiple applications to run in isolation within virtual machines on the same physical machineVirtualization provides direct access to the hardware resources to give you much greater performance
The Virtual Server Concept
Hardware independence–Guest VM sees the same hardware regardless of the host hardware
Isolation –VM’s operating system is isolated (different) from the host operating system
Encapsulation–Entire VM encapsulated into a single file
Virtual machines provide:
Benefits of VirtualizationIncreased hardware utilizationServer consolidationDecreased provisioning timesLoad-BalancingImproved securitySoftware DevelopmentTesting / Quality AssuranceTrainingDisaster Recovery
Virtualization Increases Hardware Utilization
Before VMware After VMware
Virtualization enables consolidation of workloads from underutilized servers onto a single server
to safely achieve higher utilization
Server Cosolidation
Consolidation means collection of different things and make one.
Increase Hardware configuration.
Decrease povisioning Time
Consolidation means collaction of different things and make one
Load-Balancing
More balancing
Training / Test Labs
The Disadvantages of Virtualization
o Increase complexity of IT environmento Physical failures become “serious”o Performance Testingo Hardware compatibility Testingo Specific Hardware Requirements
o -custom hardware devices
o Resource-intensive applicationo -VMs may have RAM/CPU Limitations
Physical-to-Virtual (P2V)Conversion of an existing physical machine into a virtual machine
-Operating system, settings, and all data
File ServerDatabase Server Web Server
Virtual Server
Virtual Server
Virtual Server
Physical Server
Proxy Server
Virtuali
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virtua
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Syncronization
Physical failures become “serious”
Central virtual OS Architecture
Phisical Hardware
Operating System
Virtual Layer
Virtual OS
Container ContainerContainer
Central OS Architecture
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