虚拟化或不虚拟化？这是ADC的问题

在没有发出讽刺的情况下，虚拟应用程序交付控制器（ADC）的主要好处是，嗯，它是虚拟的。它不需要部署硬件，使其降低成本。它是移动的，所以ADC可以实时地从一个位置移动到另一个位置，并且可以由任何人自我配置，包括应用程序开发人员。但虚拟ADC也有他们的缺点。从历史上看，ADC一直是位于数据中心的网络和应用层之间的物理设备，或者在网络的边缘部署，以帮助优化服务交付。雷竞技电脑网站ADCS的主要作用是负载平衡目的，但在过去半年内增加了许多高级功能，如加密，安全，视频优化和一些应用程序特定功能。这种功能在功能中增加了对不同垂直和公司大小的ADC的需求。这种需求增加是为什么最近推出的ADC的许多版本，包括虚拟版本。但是，求解问题，但虚拟ADC可以替换生产环境中的物理系统吗？毫无疑问，虚拟ADC可以用作开发人员工具，但大问题是在生产环境中，导致我们对“虚拟化或虚拟化虚拟化的问题”，这将导致我们的问题 In my opinion, the application developer use case is one of the primary use cases for a virtual ADC. This would allow application developers to test how applications respond to the various functions in an ADC before it’s moved into a production environment. Otherwise the developer may write the application one way, then have to modify it after it moves into production. The other obvious use case is for small businesses or companies that haven’t historically used ADCs before. It’s a low cost way to try them out, understand the benefits and then decide whether staying with a virtual ADC is the right thing to do or not. For high performance areas though, I believe that the scalability that is offered up by dedicated, optimized hardware platforms can’t be match by virtual applications. I know many will argue with me on this point but look at pretty much any network function in a high performance area – routers, security devices, session border controllers, WAN Optimization and ADCs to name a few. There are virtual versions of all these devices but there is very little use of the virtual version in high performance areas. Networking is hard and requires specialized hardware to be optimized. Despite the advancements in virtualization technology, physical devices that are deployed on hardware specifically optimized for that specific function will outperform a virtual version on general-purpose hardware. So if the ADC needs to perform to not slow down the application or service, the small amount of CapEx that would be saved by deploying a virtual ADC isn’t worth the risk performance degradation. The heart of a data center or the edge of a network is definitely not the place to skimp, as the service problems that could result will eventually cost more money. I do think virtual ADCs have their place. They can be used to augment a company’s overall ADC strategy. But before making the proclamation that the physical ADC is dead, think about the role the device plays and where it sits in the network.