描述、分类和比较的云景观

“I work for a PaaS company” I answered him. “Ah, okay, great”, and he moved to another subject. It was a cold winter day on a hipster cloud conference. He wasn’t the only one that directly knew what my company did. Most people there knew the difference between Infrastructure-as-a-Service (IaaS), Platform-as-a-Service (PaaS), and Software-as-a-Service (SaaS) and therefore knew exactly what a PaaS company did, right?

"我在一家PaaS公司工作"，我回答他。"啊，好的，太好了"，然后他转到另一个话题。那是一个寒冷的冬天，在一个时髦的云计算会议上。他并不是唯一一个直接知道我的公司是做什么的人。在场的大多数人都知道基础设施即服务（IaaS）、平台即服务（PaaS）和软件即服务（SaaS）之间的区别，因此完全知道PaaS公司做什么，对吗？

Well, not exactly… Nowadays, it’s almost as broad as saying “I work for a software company”. What is your point of reference when you hear the term PaaS? Heroku? Google App Engine? Force.com? Mendix? I think the popular wisdom that cloud comes in three flavors (IaaS, PaaS, SaaS) is not providing a realistic picture of the current landscape. The lines between these categories are blurring and within these categories there are numerous subcategories that describe a whole range of different approaches. I think it’s time to have a closer look at the cloud landscape, to really understand what IaaS, PaaS, and SaaS are (and are not), and distinguish the different categories within. I would like to propose a framework to categorize the different approaches seen on the market today.

嗯，不完全是......现在，它几乎和说 "我在一家软件公司工作 "一样广泛。当你听到PaaS这个词时，你的参考点是什么？Heroku？谷歌应用引擎？Force.com？Mendix？我认为流行的智慧，即云有三种味道（IaaS、PaaS、SaaS），并没有为当前的景观提供一个现实的图景。这些类别之间的界限越来越模糊，在这些类别中，有许多子类别，描述了一系列不同的方法。我认为现在是时候仔细研究一下云计算环境，真正了解什么是IaaS、PaaS和SaaS（以及不是），并区分其中的不同类别。我想提出一个框架，对今天市场上的不同方法进行分类。

Let’s start by taking a look at what’s needed to run an application in “the cloud”. I will start with the hardware and move up the stack until we end up with the actual applications. The end result is a framework with 3 columns and 6 layers as depicted in image 1.

让我们先来看看在 "云 "中运行一个应用程序需要什么。我将从硬件开始，向上移动堆栈，直到我们最后看到实际的应用程序。最终的结果是一个有3列6层的框架，如图1所描述的。

Image 1 – A framework to categorize and compare cloud platforms

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