Clear concepts: Virtualization of servers and / or services

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What is virtualization?

Virtualization is a software technology that is rapidly changing environment of information technologies and radically transforming the way people use information systems.

The powerful current x86 hardware was originally designed to run a single operating system and a single application, but virtualization has done away with these limitations by enabling simultaneous execution of multiple operating systems and multiple applications on the same computer, thereby increasing the use and hardware flexibility.

You can see a more specific but more difficult to understand in wikipedia, click here .

How does virtualization?

Basically, virtualization lets you transform hardware into software. Use software to transform or "virtualize" the hardware resources of an x86 computer, including CPU, RAM, hard disk and network controller, to create a fully functional virtual machine that can run its own operating system and applications just as makes it a "real" computer.

Several virtual machines share hardware resources without interfering with each other so that you can run simultaneously on multiple operating systems safely and applications on a single computer.

What can be virtualized?

In the next picture we see what we can virtualize red, and black, are the necessary software to virtualize.

What are the advantages we get with virtualization?

• Rapid incorporation of new resources for virtualized servers.
• Reduced space and power costs in proportion to necessary consolidation ratio achieved (half Estimate 10:1).
• Global centralized management and simplified.
• It allows us to manage our CPD (data processing center) as a resource pool or group of all the processing power, memory, network and storage available on our infrastructure
• Improvement in the processes of cloning and copying systems: Easier to create test environments that allow implementing new applications without impacting production, speeding up the testing process.
• Insulation: a general failure of a virtual machine system does not affect other virtual machines.
• Improving TCO and ROI
• It not only provides a direct benefit in reducing the required hardware and their associated costs
• Reduce downtime.
• Live migration of virtual machines (without loss of service) from one physical server to another, eliminating the need for planned downtime for maintenance of the physical servers.
• Dynamic balancing of virtual machines between physical servers that make up the pool of resources, ensuring that each virtual machine running on the physical server and providing a more appropriate use of resources and optimal homogeneous across the infrastructure.
• High overall satisfaction

Types of virtualization software

- VMWare

- Microsoft HyperV

- Xen (Citrix)

- Virtual Box (Sun)

- OpenVZ

The software is established in the market that both VMware is offering the best guarantees of success of a project, while providing future evolution and growth.

Functional diagram of virtualization