Server virtualization Truth: Ten experiences to learn from

Virtualization technology has won more and more users around the world, but the industry also has doubts about the technology. Those opposed to server virtualization cite a series of questions about the technology. This article lists the top ten challenges of virtualization technology for users who plan to migrate to the virtual infrastructure. Some of the challenges are the fact that virtualization technology has existed a few years ago, but these doubts will eventually be obliterated by more sophisticated technology, more sophisticated software and competition among vendors.

1. Server virtualization software is too expensive

Some virtualization solutions are much more expensive than other software, but some solutions, such as the Red Hat Enterprise Virtualization (Rhev) software, take a fixed, predictable ordering price, eliminating the uncertainty of the project budget. Typically, virtualization initially aims to balance high-end hardware to reduce costs by using multiple virtual machines to spread costs across these systems. Virtualization will help users reduce costs if deployed properly. Proper deployment involves careful planning and meticulous technical choice.

2. Virtual machine security is limited

When it comes to virtualization, security issues are always a lingering haze. In fact, virtualization is less secure than other server technologies. Security is no less than other physical server systems. The negative information about security stems from the need for virtualization from managed operating systems. A typical managed operating system is a bare-metal system of Linux, and you must install the secure Shell manually. This means that the managed operating system is very secure because of the limited number of runs, as is the standard network service.

3. Server consolidation ratio Virtual high

This challenge depends on the type of virtualization technology you are discussing and the number of virtual machines you are questioning. The ideal integration ratio of underutilized physical systems to the appropriate size and availability of virtual machines is 3:1. A 3:1 ratio refers to a fully virtualized system, rather than a container-type virtualization with a consolidation ratio of more than 10:1. When considering virtualization technology, the consolidation ratio is not the only element of virtualization statistics.

4. Difficulty in mastering and supporting server virtualization technology

Virtualization technology has no special requirements for the standards and skills of enterprise support personnel: Linux, UNIX, and Windows services are virtually unchanged under the virtual infrastructure. The technology needed to support the physical environment can easily be used in virtual environments. The virtual operating system works very much like the physical operating system.

5. Server virtualization complicates System Management

The virtualization infrastructure is designed to be less complex than the physical infrastructure. A single management interface can be standardized with any virtual platform. From a single interface, an administrator can view the system console, create a backup, reboot or shut down the system, change hardware, and fully manage the system.

6. Application software cannot migrate to virtual machines

If your application is currently running on a physical server, they can also run on a virtual machine. Red Hat Company's virtualization software can ensure that the application software from the physical server successfully migrated to the virtual machine. Software is rarely used in this way to connect directly to hardware resources that do not normally run virtual machines.

7. Virtualization highlights the lack of cluster performance

The challenge came a few years ago, but technological advances have been made to keep up with virtualization. High-performance hard drives and controllers, enhanced virtual CPU, Gigabit Ethernet and storage Area network devices are all driving this technology. In addition, virtualization software has been upgraded to the level of virtual performance comparable to the physical machine.

8. Virtual Machine recovery time extended

As with any successful backup and recovery plan, virtual machine recovery depends on the person implementing the plan. The virtual machine recovery process is faster than the fastest hard drive system. Usually the physical system needs to reinstall the full operating system and restore the application software. This process takes several hours, and the alternative is for virtual machine recovery to replace the damaged virtual disk file with an undamaged hard disk file. The process of service recovery takes only a few minutes. Some administrators choose to use traditional virtual machine backup technology to complete this process. But this choice has nothing to do with virtualization technology itself.

9. Server virtualization causes virtual machines to spread

Server sprawl refers to the unordered creation of virtual machines to consume virtual host resources with low returns for resources. This is neither a mature claim nor a virtual infrastructure. The relationship between server sprawl and management control and breach of protocol is greater than the technology itself is based on. This situation also occurs frequently in the physical environment.

10. Server virtualization causes Licensing issues

Such questioning is as absurd as the assertion that the server is spreading. It refers to a virtual machine that allows a control administrator to misuse license authorizations on special products and cause their company to be at risk of violating regulations. Virtual machines have the same limitations as physical machines. For example, Windows systems must be activated via the Internet or by the system software to perform license authorization after the test period and the correct license activation is complete.

(editor: Heritage)