Virtualization
SERVER WITHOUT VIRTUALIZATION:-
- Only one OS can run at a time within a server.
- Under utilization of resources.
- Inflexible and costly infrastructure. Hardware changes require manual effort and access to the physical server.
-Can run multiple OS simultaneously.
-Each OS can have different hardware configuration.
-Efficient utilization of hardware resources.
-Each virtual machine is independent.
-Save electricity, initial cost to buy servers, space etc.
-Easy to manage and monitor virtual machines centrally.
Different Between Before virtualization And After virtualization:-
What Is Virtualization:-
Reasons for using virtualization:-
- VM consolidate the workloads of under-utilized servers.
- To run legacy applications VM is used.
- VM provides a secured for running untrusted app.
- VM simulates networks of independent computers.
- VM provides fault
- VM Enables to share memory in multiprocessor architecture.
Virtualization Architecture
:-
- A Virtual machine (VM) is an isolated runtime environment (guest OS and applications)
- Multiple virtual systems (VMs) can run on a single physical system
Network Virtualization :-
- The procedure of blending the accessible assets in a mesh by dividing up the accessible bandwidth into channel is called NV.
- Each channel is assigned to particular server.
- By adopting this method of VER. A true complexity of network is hidden and managed like partitioning the hard drive. FOCUS - A shared experimental facility - Long term solution for the internet.
Storage Virtualization:-
- The other name for storage system are storage array, disk array or filter.
- Storage systems use special H/W or S/W which provides fast and reliable storage for computing and processing data.
- Two types: Block VR(Logical & Physical) and File VR(optimize the uses)
- Storage can be Host based, Storage Device based, Network based
Application Virtualization :-
- Allows server consolidation, application and desktop deployment and business continuity.
- Recovery when disaster, dynamic computing, testing and development are possible.
Management Virtualization:-
Allows variety of features which are :
- Server consolidation
- Centralized policy based
- Business continuity
- Disaster recovery
To Be Continue.....
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