With storing the maturity of the network technique, the scheme that high capacity and complexity are higher is realized to become very common. The memory platform of different frameworks has increased the difficulty of management greatly, it is very difficult to get effective use so as to store resources at the same time. Users hope that can offer the basic framework of their appropriate memory through a kind of special technology, they reduce and manage the cost in effective help, and meet the harsh service requirement. The appearance of virtual technology, strengthen productivity for enterprises to a great extent, the utilization ratio of the assets of increasing, and effective management enterprise’s operation environment, and different virtual technology offers different support to users.
What is so virtual technology on earth? Come, say, shield physical the intersection of apparatus and complexity by way of shining upon or abstract on being in fact broad. It can simplify the management of the infrastructure effectively, increases utilization ratio and ability of IT resources, for example the server, network or memory. Virtual to simplify managing, helping users to be effective and centralized and shared resource, so as to utilize resources to the greatest extent.
Virtual technology used widely in trade, main application concentrate on the intersection of memory and virtual, the intersection of network and virtual, fictitious server and store virtually among them.
The memory is virtual
The memory is a main assembly to computer, it is determining that be able to operate scale and quantity of the application program on the host computer. With the progress of technology, memory technology is updating too, the cost is being reduced greatly too. And the fictitious memory makes the application program have logic memory independent of existing and physical memory resource especially, fictitious memory managing device VMM at the same time If you can’t develop make, can more run at memory at the same time a plurality of application program.
Fictitious memory managing device VMM
Then how did VMM work? In the fictitious memory, the memory address is divided into and fixes all kinds of block. A so-called paging of handlings keep at magnetic disc the intersection of memory and page that does not move about, read to the physical memory when needing, this utilizes existing physical memory effectively between different process. The magnetic disc space that VMM uses, in order to exchange the file, the similar physical memory of the function, transfer the memory data not used in the system to it, in order to more memory spaces offer the process of the activity, in addition make the memory more flexible.
The network is virtual
Mention the network is virtual, the fictitious LAN is its typical representative, it can offer a flexible and convenient network management environment, make the large-scale network easier to manage, can realize optimization the most of the network by concentrating on disposing the physical apparatus of different positions.
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