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What Is Virtualization and What Are the Benefits?
Most agree that the number one IT investment organizations are making is virtualized server consolidation. Virtualization is one of the hottest trends in the industry, for good reason. It has the ability to increase efficiency, reduce or eliminate downtime, and deliver truly incredible cost savings.
Virtualization is actually not a new phenomenon – in fact the concept is as old as the computer itself. IBM virtualized its extremely expensive mainframes in the 1960s to accommodate large corporate users. In the 1980s IBM’s central mainframe was replaced by a distributed, client-server computer system based on inexpensive servers and desktops that each ran specific applications. So virtualization becomes obsolete…for a while.
About 10 years ago, when the increase in servers became almost unmanageable, engineers began to look at the second virtualization – adapting the IBM model to the current needs of organizations. This new generation of highly sophisticated virtual servers (called virtual machines or VMs) is credited to the developer and current market leader VMware. Other providers include Citrix, Microsoft, IBM, and RedHat.
This time virtualization is here to stay. So the question for organizations is not whether to virtualize, but why not to virtualize?
What Exactly Is Virtualization?
The term virtualization usually refers to server virtualization – running multiple operating systems on one physical computer. While most computers have only one installed operating system, server virtualization software allows a computer to run several operating systems from the main system at the same time by providing other systems access to computer hardware – such as RAM, CPU, and video cards. And, since each virtual server is isolated from other virtualized servers, if one crashes, it won’t affect the others.
Virtualization works by inserting a thin layer of software directly into computer hardware or a host operating system. This layer contains a virtual machine monitor – a hypervisor – that manages hardware resources. For example, a virtual Windows computer can run Linux within a Windows interface. Or a Mac can run Windows within the Mac OS X interface.
In addition to server virtualization, there are four other types of virtualization:
• Network Virtualization clusters actual computing resources into a virtual network.
• Storage Virtualization consolidates storage from multiple network storage devices into a single virtual storage device.
• Application Virtualization separates applications from the hardware and the operating system, allowing migration without disrupting other systems.
• Centralized Desktop Virtualization uses a central server to remotely manage individual desktops – it allows IT staff to allocate, manage, patch, and upgrade desktops virtually.
The Real Cost Benefits of Virtualization
It is not difficult to imagine that by reducing the number of servers, organizations immediately realize a significant cost savings. VMware reports that their clients typically save 50% – 70% on total IT costs. Some of the major ways virtualization can save money include:
• Increase energy efficiency by doing the same work with a smaller machine. Analysts estimate that, without virtualization, most servers use only 5 to 25 percent of their total capacity.
• Reduce labor costs by increasing the server to administrator ratio
• Create a highly efficient computing pool that reduces future hardware costs
• Allows growing organizations to unlock valuable rack space without additional machines
Other Important Benefits of Virtualization
Applications are almost never built for an operating system and this is where virtualization shines. It allows developers to write and test code that crosses a range of operating systems using a single workstation.
Virtualization creates tremendous business agility. Organizations that use virtualization to cluster, partition, and manage workloads by configuring groups of servers into flexible resource pools are perfectly positioned to respond like a cat to changing needs. market.
Virtualization fundamentally changes the way IT managers interface with computing resources. Instead of wasting time monitoring 100 machines, they can turn their focus to innovation – taking full advantage of the capabilities and services the technology has to offer.
With virtualization, you can:
• Run multiple operating systems on one computer
• Optimizing business applications for maximum performance and availability
• Energy savings by reducing the number of physical servers and the energy required to operate them
• Save time by making routine tasks like deployment, backup, archiving, and maintenance easier
• Create flexibility – in virtualized environments, it is easier to move objects around, to encapsulate, to archive, and to optimize
• Improve enterprise desktop management with central control, faster desktop deployment, and fewer application conflicts
With virtualization, the typical IT staff can manage up to triple the number of servers without compromising service quality.
The Best Virtualization Solution for You
If you’re considering virtualization, you need software with easy-to-use tools for:
• Measure usage
• Gathering statistics
• Application of resource allocation policies
Find software that provides cross-platform system management for virtual and physical machines. Also look for the ability to migrate (without modification) your organization’s legacy applications and existing operating systems to virtual partitions. The software must also support the integration of virtualization with legacy management tools. In addition:
• Find a system designed specifically for your needs. For example, a larger organization may need modular virtualization, but a smaller organization may not.
• Resist the temptation to go with the cheapest solution, which is often a hodgepodge of low-end components. The end result is likely to be something overly complex and immeasurable.
• Instead, go with a fully integrated and scalable virtualization package. You want the ability to scale your virtual server to your organization.
• Look for the ability to repurpose existing hardware where possible.
• Look for high availability – solutions that provide continuous real-time replication, ensuring that data is always available – in every type of failure, including hardware crashes.
• Find virtualization solutions that simplify your overall environment. This means a solution that is easy to implement and requires little training.
• Choose an experienced, knowledgeable supplier that you trust to sell you what you need and don’t have – a company with a track record of providing excellent post-sale support.
• Check out the latest products. The next generation of products – now available – is all about management. For example, they put everything—servers, storage and network—into a resource pool. They streamline CPUs, memory, networking, storage, applications, and more.
Virtualization isn’t magic, but it’s close. An additional bonus is that over time, installed virtualization continues to build value by opening new applications. For most organizations, the many cost and efficiency advantages will make virtualization one of the best investments they’ve ever made.
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