Several major problems of virtual cloud computing in WAN implementation

What businesses need is a private cloud, and as the CIO of the enterprise, how would you choose to choose? You would say that a private cloud would be chosen. Not so simple, this training is very difficult, so here we can see, in 2008, 2009, actually did a research, 2010 2011 also did some research, here the 2008, 2009 data out is to tell you, in fact, this problem so far, The data are almost the same every year. Reducing costs and providing business agility so far are the main reasons why companies use cloud computing technology today. When we were just trying to cloud computing, the cost reduction was definitely not something that we can guarantee right now, but when we see these big international enterprises, through their comprehensive construction or use of private cloud, the process of serving them, seeing the first class of these problems, and the future facing, Still very intense environment, the CIO should make a choice.

So what is the definition of private cloud computing, and what is the difference between it and public cloud computing?


　　


in a sense, the emergence of the private cloud market is the result of the development of the public cloud. A public cloud is a resource shared by many users. For example, the cloud is generally likened to an infinite resource, where you can immediately find the resources you need, use those resources, and then release them. It's very flexible and scalable, and that's what the cloud really means. Public cloud computing is easy to understand, as all resources have been set up first and can be used only for payment. For example, AMAZONEC2 is the infrastructure cloud, and Salesforce.com is the software that serves as a public cloud. Like the public cloud, private clouds have the advantage of simplifying management, simplifying innovation, and lowering the threshold for use (internal only). For private clouds, although resources need to be controlled independently, they can still be handled in the same flexible, dynamic manner.


　　


How can companies tell if it is appropriate to use private cloud computing? Are there some metrics that require organizations to adopt a common cloud infrastructure?


　　


This problem actually depends on the enterprise and the project involved. A lot of people will eventually need two options; For businesses that are extremely focused on security, they may only adopt private cloud computing. For example, some organizations do not have access to the external Internet at all, so public cloud computing is not feasible. If you do need to master resource controls, you need to take a private cloud. We want to clarify one point: how to create a separate private cloud and deploy high-end services in it. If this is the case, it is clear that resources need to be deployed internally. Similarly, if you don't want to develop your own online document system, you can use Office365 or docs, which is, of course, the public cloud computing technology.


　　

What is the role of the
Wan in the next generation infrastructure?


　　


WAN is very important for cloud computing. One of the basic tasks that people have to do when creating or using a cloud is to concentrate all resources in one place. Unless this location covers all users, you must connect users and cloud services over the WAN. If you use a public cloud, you cannot even choose this location. The server that you choose to use to process employees ' daily activities may be in another part of the United States, so users and cloud services need to connect across the WAN. For SOI, this is the model that must be used to deliver services to users from it. With regard to IT services, the key is the need for someone to use the service. Certainly do not want them to cause trouble, so must have fast response, secure and scalable high-quality services, which is the advantage of cloud computing. Another problem is that resources are in an untouchable position. The speed of light is not easily achievable, so the farther away it is, the slower it may be. This is a challenge that many people have to face when they go to cloud services.


　　


Wan "may be the weakest link to implementing cloud planning", why? And why is this problem more pronounced in the private cloud environment?


　　


distance may be the real problem with the project. Suppose you deploy some high-speed interactive Web applications and use tables to display many sketches on a page element. If the application is deployed on a server in another country, it may become slow. Therefore, serious consideration needs to be given to how to transfer services to the cloud and deliver services to users through the cloud.


　　


since the WAN may be the weakest link to implementing the cloud plan, how can the WAN be improved to support private cloud computing?


　　


Here are two important aspects. WAN Optimization is a technology designed to deal with remote resources and low bandwidth problems. Therefore, it is a good way to deploy WAN optimization techniques in a private cloud environment. Another very basic aspect: the structure of service isolation. Similar to software design, you need to try and create an abstraction hierarchy so that changes in part of your code do not affect other parts, and WANs need to be isolated using technology such as VRF. You can view VRF as an industry-class VLAN. A VLAN is a virtual LAN that enables people to separate services and users. VRF has a similar effect, but it is applied on a wide area network.


　　

What type of WAN optimization technology is required for
private cloud environment acceleration?


　　


cloud technology Migration is largely a Web application. It can be said that one of the important differences between enterprises that use private cloud and those that use only data centers to run services is that the former deploys a large number of Web applications. This is not to say that the cloud only supports Web applications, while other technologies do not, but there is a trend in the private cloud environment. Therefore, performing good HTTP optimizations is important for WAN optimization of this environment. In addition, the use of HTTPS is also increasing, so more WAN security services are now available. Therefore, you must deploy a WAN optimization solution that achieves optimal performance while achieving end-to-end security. Not every vendor offers this technology, so some people have some security risks.


　　

Is the
hardware WAN tuning controller still valid?


　　


The hardware is definitely valid. Many virtualization technologies have been implemented to implement cloud environments, such as virtual servers and virtual networks. Therefore, you do not need a lot of devices to be able to use most WAN optimization scenarios with isolation. For example, different VLAN traffic can be restricted to VLANs to enable service isolation through a hardware tuning controller. Moreover, the hardware approach can achieve greater scale. In a private cloud environment, the peak can be more flexibly controlled, so large-scale scaling is not as difficult as the entire Internet. Both are important. That is, the virtual WAN Tuning controller is a better model for most people when trying to determine which method to implement. It has advantages in the concept and integration of horizontal expansion. For example, Riverbed's cloudsteelhead has a blocking technique called discovery agents that does not intercept at the network level like other hardware and virtual software devices, and can install this small software on a server that you want to optimize. This simplifies the process of integrating cloudsteelhead into the cloud environment.


　　

What technology does
need to deploy WAN optimizations in a private cloud computing infrastructure?


　　


the answer to this question has two aspects: technology and business. In terms of technology, there are many issues to consider. You need to understand what is ready to be optimized and how it interacts with other network components-firewalls, IPS devices, and load balancers. In an optimal environment, location deployment devices are not randomly chosen. For example, you do not want to perform an intrusion-prevention depth packet detection operation on an optimal character. These target strings and packets need to be allowed because they are important for design. Similarly, network visibility can control the performance of network packets. These have advantages and disadvantages for different visibility mechanisms. You can even mix these techniques. For example, in steelhead, transparent visibility can be used in some locations, while others use direct addressing technology, which enables the use of the correct technology in different environments. On the business side, the key is to understand the business value that you want to achieve. What is most important in this project is Web acceleration, video, or SAP? Need to be clear about business value and try not to be disturbed by a variety of additional features.