There are 7 fabulous things need dissecting.
The benefits of virtualization to every business, regardless of their scale. Virtualization, in this case, is understood as creating information technology infrastructure does not depend on the part of the device. For example, the service needs are located on the virtual machine and we don't need to view services that are located on the physical server (server). Virtualization of servers, desktops, applications ...-it is a series of methods that make up the independent infrastructure as said.
Often the "familiar" a new business with virtualization technology will start from the virtual server. In this case, on a server or a host server (host), thanks to the special software called Hypervisor will have several virtual machines (the client) is deployed.
Virtualization technology has a series of advantages. First of all, it reduces costs for businesses. In addition to the savings by reducing the number of server equipment, enterprises save power consumption, save an area of the server, do not need much cooling capacity as the number of device servers off ... One advantage of virtualization is that the recovery time savings. When the equipment problems, simply move the files from the virtual machine to a different device. In the framework of the industrial solution, the one in the server device delays will not lead to a stop against the service being used.
The advantage of virtualization is also reflected in the increase in computer management. Different from the traditional model on a server to deploy a range of applications, thanks to the use of virtual structures, one can separate into virtual servers per application. In this case, the stop an application for maintenance will not lead to stopping operating the remaining applications. Pity that among the leaders and specialists in information technology is few fabulous thing interfere the common advantages of virtualization.
Only for large companies
Virtualization is only for big companies. Using virtualization for small and medium businesses do not use any other cannons to shoot sparrows.
In fact, any business would, any scale, all have been the benefits of virtualization. With small businesses, can fully invest according to the scheme so that all services operate on the virtual machine and the virtual machine is deployed on a host device. Benefits for small businesses is completely obvious.
Slow going many times
The second myth:
how virtualization system productivity decreased dramatically.
The fact is, at present, rarely of equipment resources modern servers are used to 100%. As a result, a large part of the equipment in a State of "sleep dropouts". It is especially characteristic for the domain control servers, DNS, virus prevention applications focus etc. Give each service a separate physical server, this is not reasonable. So, can completely transfer the few services up to the corresponding virtual host and focus them on the host system in a device server without loss of productivity. Meanwhile, the need to prevent the unexpected solution. In any solution would also have the "ceiling" speed and the speed is also present in the specific virtualization system. So, when the virtual machine is deployed, must necessarily test application medium operating speed of deployment and proceed to the next virtual server deployment onto the same host system. With each virtual machine, need for additional 20% of the resources which it occupied for support and also to add a few the resources with which to "feed" the host system.
Need specialized equipment
The third myth:
special equipment is required as the system blade, the dedicated servers such as the IBM x3850 type etc.
Source of the myths comes from these workshops, screenings of the device manufacturers have well-known brands like HP, IBM. At the time of introduction, they always assign more Marxist line "for virtualization" in conventional devices, for example, the blade server system (blade systems). This also takes place due to the stated premise is incorrect. For example, "The expensive solutions that have been" embedded "virtualization they will convenience and simplicity". But, in fact, deploy the virtual machine can be in any way depending on whether the device servers have the "pull" is not known.
Only the limitations are as follows: the program a modern hypervisor (virtualization host systems that are deployed on it) may not support some devices. Usually, these problems are related to the RAID controllers and network adapters. Included are tips to overcome these problems. For example, RAID can be organized (the storage method-ND) under the program in additional network cards, or hypervisor. Whereas on the basis of the old G4, HP servers do not need to add any additional, people can still implement a few virtual machine, save in the case of both the seat inventory and the money to buy additional servers.
Good or free
The fourth myth:
Under the principle of as little as possible then good for virtualization software is the kind of pay and very expensive because "free cheese pieces are usually only in the mouse trap".
Indeed, everything totally backward. These free products like VMware ESXi, Citrix XenServer as well as Windows 2008 Standard (64 bit) Hyper-V Core is essentially the "small version" of the commercial product. Meanwhile, in they also have things like a paid, the same principle of operation, the same virtual machine formats. Along with time, when big business is strong and growing it infrastructure is large enough, they can switch up to use a pay (without stopping the application to install new). Comparison of the ability of the free and paid solutions can be seen as basic Hypervisor functionality, converters, working with many types of reservoirs of data, the ability to move virtual machines between host-server that does not have to stop services are available which do not depend on the free or paid version.
Hard to serve
The fifth myth: this is hard.
In fact, almost all modern means of virtualization has a great graphic interface with intuitive management means, "for every taste". Instead, the majority of the previous operation must go directly to the server (for example, increase the amount of memory or adding a second processor, ...), the system administrator can now do not need to get out of that position with remote control server conditions that he serves also to virtualization.
Do not trust
The sixth myth:
Virtualization is not trusted.
It is true that when the host system's job was to stand due to software errors or bugs, the device will have the uninterrupted operation of the virtual machine is installed on it. But, following examples allow people don't need to worry. A company has 250 people do. Virtual goods system built on the basis of the combination of the operating system such as Linux CentOS 5.2 and VMware Server on Intel Server platforms SR1500PAL, 2 Intel Xeon 3.2 processor/900, 4 GB RAM, RAID1 and RAID10 36GB 2xHDD 4xHDD 146 GB total capacity of General 292GB. We have developed 4 virtual machines:
Postfix mail server on FreeBSD operating system (Unix). To receive mail, the end users use the POP3 protocol
The seventh myth:
hard to find virtualization expert.
It is true that it is difficult to find skilled IT professionals. And, the virtual goods system, in this case also is no exception. Meanwhile, the majority of products from manufacturers such as VMware, Citrix, and Microsoft are attached to the document very clearly. The conferences and workshops are regularly held, in which can exchange directly with experts representing the studios and large system integrator, just needs. Of course, would be hasty if students do administrate a complex virtualization system. Currently, the number of professional network management skill building the virtual goods system, not less.