Infrastructure as a Service (IaaS).
基础设施即服务(IaaS)。
Elasticity is the first critical facet of IaaS.
弹性是IaaS的首要关键方面。
Nimbus is another IaaS solution focused on scientific computing.
Nimbus是一种以科学计算为中心的IaaS解决方案。
The IaaS divides into two types of usage: public and private.
IaaS分为两种用法：公共的和私有的。
This bundle, with or without storage, is usually referred to as IaaS.
这种捆绑在一起的服务通常简称为IaaS，无论是否带有存储能力。
Internet-based services such as storage and databases are part of the IaaS.
基于Internet的服务(如存储和数据库)是IaaS的一部分。
IaaS-agnostic - by supporting multiple vendors in a custom transparent way.
IaaS无关性——支持多种IaaS供应商，对客户透明。
Figure 1 provides a very simple look at the structures of the PaaS and IaaS models.
图1十分简单地说明了PaaS和IaaS模型的结构。
IaaS is the leasing of infrastructure (computing resources and storage) as a service.
IaaS就是将基础设施(计算资源和存储)作为服务出租。
You will need to see a threshold policy for the infrastructure from the IaaS provider.
您需要查看来自IaaS供应商的基础架构阈值策略。
The best known IaaS environments are Amazon EC2 (Elastic Compute Cloud) and some others.
最有名的IaaS环境是亚马逊ec2(弹性计算云)等等。
Modern development of cloud qualifes three levels of cloud based solution – SaaS, PaaS, IaaS.
当今云技术解决方案的开发分三个级别——SaaS，PaaS,IaaS.
However the IaaS does not have an application-development environment or any testing services.
然而，IaaS并没有一个应用程序开发环境或者测试服务。
Amazon EC2 is playing a role as the IaaS in these layers and provides users virtualized hosts.
AmazonEC2在这些层中作为IaaS，向用户提供虚拟的主机。
The benefits of IaaS include rapid provisioning, ability to scale and pay only for what you use.
IaaS的优点包括快速供应、扩展能力、只为使用的资源付费。
Infrastructure as a Service (IaaS) is a great concept: you use computing resources; you pay for them.
基础设施即服务(Infrastructureasa Service,IaaS)是一个极好的概念：您使用计算资源并支付费用。
IaaS is the rawest form of computing as a service (outside of access to the physical infrastructure).
IaaS是作为服务的计算的最原始的形式(除了对物理基础设施的访问)。
PaaS or IaaS tends to be a decision of cost, service level, or congruence with your requierments.
PaaS或是IaaS是个费用、服务层或是与需求一致性的决定。
Rackspace says it operates nearly 64,000 servers globally, but notes that only some are used for IaaS.
Rackspace则称他们在全球运行的服务器将近6万4千个，同时指出其中只有一部分用作IaaS服务的。
The IaaS provider controls the infrastructure of traditional computing resources in the cloud environment.
IaaS的供应商控制着云环境中传统计算资源的基础架构。
The system is decoupled from the underlying infrastructure and therefore easy to get running within any IaaS layer.
由于系统与底层基础设施间的连接是松耦合的，所以它能轻易地运行在任意IaaS层之上。
PaaS is similar to IaaS but includes operating systems and required services that focus on a particular application.
PaaS类似于IaaS，但是它包括操作系统和围绕特定应用的必需的服务。
IaaS (infrastructure as a service) delivers computer infrastructure, typically a platform virtualization environment.
IaaS(基础设施即服务)构建的是计算机基础设施，通常是指虚拟化平台环境。
A Microsoft whitepaper presents the details of building such an IaaS platform with the upcoming server OS from Redmond.
微软公司的一份白皮书揭示了应用即将发布的服务器操作系统来构建IaaS平台的细节。
Now that you understand the concept of elasticity, let's take a look at the second major facet of IaaS: virtualization.
理解弹性概念之后，现在我们来看看IaaS的第二个主要方面：虚拟化。
All platforms performed well for small objects, while PaaS platforms performed better than IaaS for larger objects.
所有平台针对小对象都表现不错，而在大对象方面，PaaS平台比IaaS更出色。
Let's start at the lowest level of service provided, which is the infrastructure (Infrastructure-as-a-Service, or IaaS).
我们从最低级的服务开始，即基础设施(Infrastructure - as - a - Service或IaaS)。
With IaaS you can control the operating systems, network equipment, and deployed applications at the virtual machine level.
使用IaaS，您可以在虚拟机级别控制操作系统、网络设备和已部署应用程序。
These customers seek all the capabilities of self-managed IaaS, but do not want to be entirely responsible for operations.
这些客户希望获得自管理IaaS的所有功能，但不太愿意自己完全负责运维工作。
Developing for a specific vendor's proprietary IaaS could prove to be a costly mistake if the vendor were to go out of business.
事实证明，如果某个供应商可能会停业，那么针对该供应商的专有IaaS进行开发将是一个代价不菲的错误。
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