The feasibility analysis of old Wangxue linux-Cloud Desktop

cloud computing in full swing of the hot development of the present, traditional desktop system is also unavoidable to be cloud, why it is cloud, where his needs. The desktop is one of the most important link in the Internet infrastructure : It is directly in contact with the user, which means that it is in great demand and the market share is heavy.

general new technologies are stronger than the old technology, will slowly replace the old technology, but the cloud desktop is abandoned by all walks of life, what is the reason for it ?

1comparison of running logic with traditional desktops

Compared to the cloud desktop, the traditional desktop running logic is much simpler, but on the computer hardware to run a custom-built system has been compiled, usually a computer. And the cloud desktop is more complex, the cloud desktop of the operation of the logical diagram is as follows.

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first, in the client side is also a computer, but this computer is special, is a special custom Linux, its main function is networking, remote connection to their desktop system, and then the compute node running its own desktop system, how users connect to their own desktop system ! On the control node to each desktop defined name, users use their own desktop, the need to first to the control node application, control node judge the user is legitimate, the corresponding desktop management rights to the applicant.

2the current solution

the solution has open sourceOvirtand theVmwareof theESXi,ESXiis also running inLinuxin the, so we have reason to suspect thatESXiis aOvirtthe depth of the custom version, below we will putESXiamongOvirtunderstanding. Exsiis closed source, I have to sayOvirtthe running logic. OvirtThe Compute node is theLinuxinstallationKvmand theLibvirt/vdsm. Then there isOvirtthe control node providesWebmanagement interface, inWebAdd the compute nodes in, you can create a delete virtual machine, the control node isSshto manage compute nodes.

3compare with the traditional desktop3.1Use management

Traditional Desktop installation is a persistent problem, although a lot of installation simplification, but it is installed in contrast to non-computer professionals are also very difficult. There are many tutorials on the internet, many tutorials summarize the following steps:1 boot Press certain keys into the boot selection interface,2 Select Boot,3 to disk partition. Installation can follow the tutorial to install slowly, but out of fault, or to professional people, so computer installation also lazy learn to outsource directly to others. Generally around the company needs network management personnel, network administrator will be Ghost system to do backup, system problems on the restore, restore and install the program needs about five minutes, this company computers are the same situation, In case of the company's various computers, the difficulty of restoring the system is much more difficult, the time required to conservatively estimated to take 1 hours; hardware bad, general bad is hard disk or memory, serious motherboard burned, network administrator will contact the computer after-sales repair, usually need 1 Days. Small companies do not have network administrators, something bad directly take to the computer repair shop about two days.

Cloud desktop is generally a company with administrators, System installation Administrator, System Restore and installation program requires 3 days, but generally no problem; the control node is broken, then the problem of loved, all the virtual machine is broken, if the control node is repaired, and the data is not lost, everything is okay, if the data is lost, So the virtual machine data are lost, find the difficulty is very large, control node as far as possible to do Raid san day.

	traditional desktop	Cloud desktop
< P style= "text-indent:0;" > desktop system corruption	hours	< Span style= "font-family: ' The song Body '; The possibility is large, the influence range is small, the repair time 3 minutes
< P style= "text-indent:0;" > management system	1~3
Hardware corruption	Small probability, small impact, maintenance time of Day	the possibility is particularly small, the impact range is particularly large, maintenance time of the day

3.2 CPU, memory, storage, display

Cpu due to hardware-assisted virtualization technology, performance loss 20%. But virtualization has a very useful feature to share computing resources, that is, a server and a CPU core, we create 6 virtual machines, to allocate 4 CPUs per virtual machine ,the CPU is virtual and can be over-provisioned. The logic of the super-matching is because the office computer generally does not need too much computing power, we also run a high computational program is less likely.

Memory is generally allocated in real memory, and the hyper-match will cause some special problems.

storage, the overall space occupied by the desktop system is much smaller than the traditional desktop because startup is a snapshot of the virtual machine, but everyone has a small amount of free space. But storage has a serious problem, but basically does not encounter, many people at the same time to the hard drive data transmission, which will cause all virtual machines particularly slow, because I/O is particularly CPU-intensive.

show, this is definitely the shortest cloud Desktop board, those 3D pictures, video production companies never consider the Cloud desktop, a server chassis up to two video cards, a high-end graphics card is only higher than standard graphics 25% performance, the price is one times higher.

Mobile office, which is also the short board of the cloud desktop, but also the ultimate killer of the cloud desktop in the cradle.

Overall, performance is not as good as traditional desktops but can meet office needs.

4applicable user type

School: Students use the computer is particularly strong, computer failure is more likely, cloud desktop in the desktop system maintenance convenience, it seems to be tailored for the school.

Hospital: Must be cautious with the cloud desktop, once the problem may lead to the whole hospital Office system crashes, the disease is not equal to the responsibility of the major.

sales: Actually a phone, a notebook, a pen, basically meet the demand, due to the IP phone to provide convenient customer information and telephone number agreed to the characteristics of management, cloud Desktop is also very suitable for these companies.

Factory: Suitable for use, data can be more perfect to save.

IT: A group of people who love to toss, never use.

the above purely personal point of view, only Bie for Zhao ginseng shi er .

This article is from "Lao Wang Linux Journey" blog, please be sure to keep this source http://oldking.blog.51cto.com/10402759/1826968

The feasibility analysis of old Wangxue linux-Cloud Desktop