Use the technical pluses and minuses of virtual storage in the fictitious tabletop
The fictitious tabletop arrangement cost high, whether meanwhile will you please offer the sufficient characteristic become even to challenge. Store the framework with the bottom layer because of these and is closely related with, the problem solving through using the virtual memory technique to come of some controllers.
Now, we will tell that apply the technical pluses and minuses of virtual storage in fictitious desk-top environment. However, before at the beginning, should pay attention to some at first: Virtual storage is not that only one kind of product or technology can be realized. A lot of memory suppliers offer their own difference schemes. In this text, I am to storing the virtual definition: Lie in fictitious tabletop or bottom layer hypervisor And between physics store, offer a kind of technology of the abstraction layer.
Store the virtual advantage used for VDI
In fact the result that can reach should depend on different technology used. Most common some includes: Reduce the carrying cost, raise the characteristic and simplifies and manage. Certainly, these advantages are on the basis of the realization of each products, routes to reach are different too.
It is to repeat the data and delete technology to reduce one of the methods that the virtual machine stores the demand. Heavy technology is very suitable for VDI system to go, because even there may be a plurality of VHD minidisk inside a company ,But the fictitious disk file that each virtual machine uses is identical on the whole.
Have, go in weight product while being many kinds of at the market, though they can realize the storage space is saved, but the majority is not used for improving memory performance.
A company named Atlantis Computing Inc. receives a lot of demands for its Atlantis product.
ILIO based on software implementation to go in weight product, directed primarily to the fictitious desk-top environment. Layer of this software locates between hypervisor and storing layer, repeat the data and delete movements in the real time and place before the load IO is sent to the magnetic disc.
It is Virsto VDI that another one VDI environment stores the products that the demand is designed. Similar to AtlantisILIO, Virsto VDI can improve the memory performance of the virtual environment too, but methods to realize are totally different.
Virsto VDI has used the special VHD form, but not VHD framework of hypervisor acquiescence. The final result is a expanded minidisk characteristic of the trends, according to the difference of the company, a certain degree of the meeting is superior to the solid condition VHD magnetic disc. The promotion of this characteristic is realized by that the trade type store the mechanism.
Because there is very strong random property in write operation in VDI environment, Virsto VDI realizes the unified management of the load I/O through the mode of using the trade type daily record, then the phased load is stored to physics. The final result is that I/O operation goes on in a manner to flow, thus realize memory performance is optimized.
Store the virtual shortcoming
Though can realize a lot of advantages through storing virtually, bring some shortcomings at the same time. First of all, though most suppliers declare their products can reduce the carrying cost, but it needs to be original to be put into to store the virtual products, including the cost of long-term maintenance support. The cost may offset the income losing the storage space and saving to bring finally.
Another potential shortcoming is, stored virtual technology, added one layer in storing the framework after using, have increased the complexity. This makes failure diagnosis after going wrong more difficult. In addition, perhaps you will also find the producer of hypervisor unwilling in order to store environmental the virtual one and carry on technical support. For example, Virsto VDI has used totally different VHD file formats. Though has not met the situation that a certain hypervisor supplier refuses to offer technical support to Virsto VDI customer truly at present, but such a potential risk certainly exists.
Finally, it may cause physical storage space resources to go beyond and use to store virtually. Simplify and dispose the minidisk that technology establishes automatically, the original space is pygmy, can expand dynamically as the space demand increase. Crossing mixing technology of memory resource, so as to need to increase and store while increasing the fictitious secret degree, but if the fictitious hard disk file increases very quick, may result in storing the demand and going beyond the actual physical storage space of bottom layer.
So, if you are considering as VDI environment and increasing virtual memory technique, the very important point is to weigh the gain and loss among them. Though the result is that incomes are far greater than potential losses under most situations, the factor of contemplating two respects is always right.
Tags: software implementation, improving memory, virtual machine, computing inc, carrying cost, storage space, virtual memory