Desktop Virtualization Solution

时间: 2016-07-01 14:06:49
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1 Desktop Virtualization

1.1 The current status of office automation environment

The existing office automation system is based on the traditional PC mode, which requires the installation of the needed software programs and client on every PC, while since the important data is distributed on different PCs, it is inconvenient to collect and backup them.

In the current situation, the client security risk is increased. There are many PC security vulnerabilities, so the business data in the client are under the risk of leakage and loss, and the users' business environment may also be attacked or damaged.

The staff's working environment is bound to PCs, so when the hardware or software break down, the staff have no choice but wait for IT maintenance personnel to repair, resulting in a lack of maintenance response which directly leads to low influence and inefficiency.

The cost of business terminal maintenance keeps increasing, because IT operation personnel should carry out not only PC maintenance, but also the desktop management and the maintenance of operating system environment, application installation, configuration and update. With an increase of applications, maintenance work is going to escalate.

As the scenes of applications get more and more complicated, there are increasing requirements for functionality, security, convenience of business system, for example:

Fast switching among work scenes: the increasingly scattered workplaces results in the problem of how to share the data. The current system cannot meet the need of a flexible desktop which can switch according to the users.

Business continuity: a quicker response to a variety of natural disasters and environmental changes requires greater capabilities in business continuity to order to restore business access within a short time.

Relocation and expansion of workplace: how to achieve the capability of user access as it was in the past or even surpass that in the past at the lowest cost of IT resources.

Therefore, to simplify the client environment and implement centralized deployment, management, operation and maintenance, desktop virtualization is an effective solution.

1.2 What is desktop virtualization?

In simple terms, desktop virtualization is the technology that supports enterprise-level remote dynamic access to the desktop system and the unified management of data center. We can have access to our personal desktop systems on any device no matter where and when we are through desktop virtualization.

From the day when modern computing came to existence, it always has been a problem to let multiple devices co-calculating, and gradually came different models in different periods such as the models of "host/terminal", "client/server (C/S)", "browser/server (B/S)" and so on. However, no matter what kind of model it is, they all reflect the same guiding idea--cooperation and collaboration of the calculation in the "foreground" and the "background". "Background" here mainly refers to the data center, computing center and other core facilities, usually including servers, storage, network system, and security system. It is infrastructure-oriented, centered on infrastructure construction, focused on the improvement of clustering, fault tolerance, and to cope with disaster, server consolidation and other solutions. The "foreground" refers to the terminal equipment and its users, such as PC, workstations, notebooks, netbooks, smart phones, PDAs, etc. It is application-oriented, and values the business security, continuity, diversity and extensiveness of applications and business.

As the network gains its popularity, TCP/IP-based network computing has become factual standard. After a good commitment to historical responsibility, the "tight coupling" approach encounters new challenge in the face of the explosive increase and change of the "foreground", including: application convenience, flexible mobility of terminal platforms, data security, business continuity and so on. Although some of the current programs on the market can partially tackle with these challenges, it cannot solve the problems completely. From the users' point of view, they need a package of integrated solutions to make IT optimization and improvement really meet the needs of business development. At this point, desktop virtualization technology came into being.

Among the top ten on the 2010 InfoWorld list of hot spots technologies, desktop virtualization is the second. Forrester predicts that from the beginning of 2010, desktop virtualization will gradually be adopted by enterprises on a large scale. After years of development of the virtualization technology, the desktop virtualization derived from it will bring a fundamental change in enterprise IT system.

1.3 Advantages of Desktop Virtualization Solution

1.3.1 Use of thin client

The computational execution process is rare at the edge of the desktop virtualization environment, so the dependency of the computing system architecture on the processing capability of the terminal device is reduced. This provides an opportunity for the IT personnel to significantly reduce terminal hardware costs. They can use the PC as a desktop virtualization terminal device to extend the service life the PC or to replace aging PCs by thin clients, whose service life is twice of standard PCs.

1.3.2 Improved data security

Moving data from the edge of the IT environment to the data center reduces the security risks faced by IT departments. The centralization of data access can reduce the risk of data leakage and theft and simplify compliance procedures.

1.3.3 Simplified data backup

The centralized virtual desktop completely resides in the data center, so it is easier to ensure the full compliance with backup policies. Besides, depending on the architecture of the platform, the use of merged images and incremental stored files can further simplify the extraction and collection of important data, so that the backup process can also be simplified. "On a regular computer, there can be hard disk crashes and data loss, and the use of centralized virtual desktops causes the system to constantly back up the data. " explains a law firm whose focus is on backup issues.

1.3.4 Simplified recovery from disasters

Virtualization machines help to simplify the recovery from disaster to a great extent because central IT personnel can easily restore virtual desktops to the last known healthy state. Thus, IT personnel no longer need to provide an alternate terminal device that uses the latest image to keep ungraded.

1.3.5 Deployment time

When thin clients are used in a desktop virtualization architecture, since there is no need to install anything on the terminal device, the process of deployment is significantly simplified. According to the senior executive of a medical industry supplier. "the benefits of virtual desktops start from the easy deployment of applications ... [previously] I need to spend an hour on each PC to deploy new applications to it in a year, but now I may only need to spend 15 minutes on the virtual PCs to perform the same deployment."

1.3.6 Simplified PC maintenance

If used properly, virtual desktop maintenance is much easier compared to traditional PCs. Because of the unique nature of virtual machines, maintenance tasks become much simpler, including patching applications, provisioning/terminating provisioning users, moving to new operating systems, and performing auditing responsibilities. A law firm emphasized: "One of the major benefits for us is the centralized desktop support."

1.3.7 Access Flexibility

The users can not access their PCs in the company when they need to work at home, away from the desks, or in other teleworking situations. When the company's desktop environment is centralized, it can provide access to the company's desktop environment for the users.

Overall, virtualization technology increases the efficiency of utilizing the enterprise's resource through more flexible management tools, a smarter and stronger data center to make the desktop more secure and flexible, which reduces the total ownership cost of the enterprise and brings the maximum investment benefit.

1.4 Benefits of implementing desktop virtualization

For IT systems, desktop virtualization can help you:

1.4.1 To access and use in a more flexible way

Since IT technology came into being, there is the contradiction between the users and the IT management:

In the early era of large machine, the use and the management work were all performed in the machine room. It was not convenient for the users, but the work was simple for the management of administrators.

Then the PC appeared. Users did not have to work in the machine room, which made it more convenient to use IT technology. However, the management of administrator became more complex. The management was decentralized with the decentralization of PCs. Even if the network allowed the management work to be done online, the success rate was still relatively low and the management capacity was limited.

Today, network access is no longer a bottleneck, the desktop virtualization technology has solved this problem:

Users can remotely access the desktop system to have the exactly same experience as on PCs.

Administrators can easily complete all the management work in the data center.

Thus actually the desktop virtualization technology has effectively separated use and system management.

1.4.2 Reduced costs on the terminal equipment procurement and maintenance

Simplifying IT architecture has directly contributed to the benefit of lower cost on the terminal equipment procurement. The thin client, for example, costs below 1, 500 yuan, while the current price of a PC is about 4, 000 yuan. Therefore, each client can save about 2, 500 yuan. When invested in physical servers, according to 1: 1 compression ratio (all using virtual desktops), as long as the servers that worth 100 thousand yuan can load 50 virtual desktops, the hardware investment can be balanced. But the general compression ratio will not be 1: 1, and more importantly, the service life of a thin client is usually 6-8 years, twice as long as the PC, which contribute to the reduced cost in the second term investment. In addition, the service life of current PC system can also be extended greatly. As long as the peripherals are available, it can be converted into a common terminal, which indirectly reduces the amount of e-waste as well.

1.4.3 Secured use due to centralized management and unified configuration

Since the calculation takes place in the data center, and all desktop management and configuration are in the data center, the administrator can configure and manage all the desktops and applications in the data center such as system upgrades, application installations, and so on, which avoids the management difficulties and high cost due to the distributed terminals. It is especially suitable for the application scenarios of a large scale and changing needs (frequent changing of operating system) such as the school machine room, teaching center.

Since it is only the final operation images that are transmitted and all the data and calculations take place in data center without transmitting the confidential data and information via network, there is increased security. In addition, the data can be configured to not allow to download through the client so as to make sure that the users will not take away or spread confidential information.

1.4.4 Power consumption reduction, energy saving and emission reduction

The traditional PC is generally more than 200W, while the thin client is about 25W, which means the power consumption of a thin client equals to one tenth of a traditional PC. The computing pressure of servers will bring a certain degree of power consumption rise, but compared with the large number of clients it can be left out. Thus, the year-round electricity cost will be reduced by about 90%.

The reduction in power consumption means the reduction of carbon emission, which echoes to the requirement of a low-carbon era.

It should be emphasized that the advantage of desktop virtualization has a typical scale effect, which means that more terminals there are, more prominent the benefits and advantages will be.

1.5 Desktop virtualization and cloud computing

With the rise of "cloud computing", cloud-based application delivery has gradually become an inevitable trend of IT industry development. For enterprises, the best way to improve IT efficiency with the same budget is to build a private "cloud" architecture. And the first step of the private "cloud" must be desktop computing virtualization. At this point the users do not need to understand what technology is used in the background, what is the hardware or software platform, or to be distracted by the system security or data protection. They can enjoy the functionality and services provided by desktop virtualization without any concern. This is what cloud computing offers.

It has always been the focus and difficulty for enterprise IT terminal management to standardize desktops. The traditional terminal desktop standardization solution generally consists of the terminal unified deployment solution, the terminal unified management solution and the corresponding asset management, the patch management, the application control management module, and the security module.

With the development of virtualization technology, enterprise desktop management embraced a new solution - Virtual Desktop Infrastructure (VDI).

VDI is committed to solving the problems of terminal desktop information security, centralized computing, centralized management, mobile officing, ideal solution of teleworking. It is a manifestation of private enterprise cloud. It uses remote desktop technology and supports front-end thin client, back-end desktop backward shifting, and centralized computing.

2 Desktop virtualization solution

2.1 VMware View Manager virtual desktops

The background of View is vSphere for Desktop, the highest version of support of vSphere. vSphere provides powerful server virtualization and has a number of successful cases. As a support for virtual desktop back-end, v Sphere provides: