Infrastructure-as-a-Service (IaaS) cloud providers hide available interfaces for virtual machine (VM) placement and migration, CPU capping, memory ballooning, page sharing, and I/O throttling, limiting the ways in which applications can optimally configure resources or respond to dynamically shifting workloads. Given these interfaces, applications could migrate VMs in response to diurnal workloads or changing prices, adjust resources in response to load changes, and so on. This article proposes a new abstraction that we call a Library Cloud and that allows users to customize the diverse available cloud resources to best serve their applications. We built a prototype of a Library Cloud that we call the Supercloud . The Supercloud encapsulates applications in a virtual cloud under users’ full control and can incorporate one or more availability zones within a cloud provider or across different providers. The Supercloud provides virtual machine, storage, and networking complete with a full set of management operations, allowing applications to optimize performance. In this article, we demonstrate various innovations enabled by the Library Cloud.

中文翻译：

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超级云

基础架构即服务 (IaaS) 云提供商隐藏了用于虚拟机 (VM) 放置和迁移、CPU 上限、内存膨胀、页面共享和 I/O 节流的可用接口，从而限制了应用程序优化配置资源的方式或响应动态变化的工作负载。鉴于这些接口，应用程序可以迁移 VM 以响应昼夜工作负载或不断变化的价格，调整资源以响应负载变化等等。本文提出了一种新的抽象，我们称之为图书馆云并且允许用户自定义各种可用的云资源，以最好地服务于他们的应用程序。我们构建了一个图书馆云的原型，我们称之为超级云. Supercloud 将应用程序封装在用户完全控制的虚拟云中，并且可以在云提供商内或跨不同提供商的情况下合并一个或多个可用区。Supercloud 提供虚拟机、存储和网络以及全套管理操作，允许应用程序优化性能。在本文中，我们展示了图书馆云支持的各种创新。