英语听力好的帮忙听下这段英文,写出英文即可,时长一分钟,每个单词都要准确,我就是个别单词听不懂 英语听力中经常听错的 易混淆的 单词学过却听不懂的。麻烦各位...

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Cluster architectures seem to be spreading like wild fire as a design framework for the analysis of big data. And one of the main reasons for that seems to be that cluster architectures actually present cloud level economies of scale, extensibility, agility and, most importantly, performance. All of them very important prerequisites to perform big data analytics. But how does it achieve all that? And how does it compare or differ to traditional enterprise architectures? Well, we believe it is important that you understand the differences rooted in the founding principles between the traditional enterprise architecture and the cluster architecture.

The traditional architecture design is based on the assumption that there are three main types of hardware resources to be managed: servers, enclosing very expensive processing and main memory capacity that should not be idle at any moment in time. Storage arrays, enclosing drives of different performance capacity in cost per gigabyte, ranging from solid state drives to SATA. And storage area networks, or SAN, connecting a set of servers to a set of storage arrays.

One of the beauties of this architecture is the decoupling between the servers and the storage arrays which can expand, be upgraded, or retire independent of each other while the SAN enables applications running on many of the servers to have access to data stored on any of the arrays as long as they have the right access credentials.

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The type 1 hypervisor we're going to be talking about today is when u have a hypervisor that just allows for the bare minimum amount of virtualization and nothing else on a piece of hardware. Type 2 hypervisor, a hosted hypervisor, what that means is that you actually install a full fledge operating system onto the hardware and then you install the virtualization software on top of that, and then you install the operating system into that virtual software. So if we are talking about virtual box, if we are talking about VM fusion, if we are talking about virtual PC, you install virtual box onto a Windows or Mac or Linux computer, then you istall the operating systems in the 2 virtual box. So we're talking about today is a type 1 hypervisor,a bare metal hypervisor, what that means is you install the hypervisor onto the bare metal, just like you would in a standard operating system,then the instances

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