Live migration of virtual machines
Live migration of virtual machines
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发表时间：
2005-05
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通讯作者：
Christopher Clark;K. Fraser;S. Hand;J. Hansen;E. Jul;C. Limpach;I. Pratt;A. Warfield
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作者：
Christopher Clark;K. Fraser;S. Hand;J. Hansen;E. Jul;C. Limpach;I. Pratt;A. Warfield
跨不同物理主机的迁移操作系统实例是数据中心和群集管理员的有用工具：它允许硬件和软件之间的清洁分离，并促进故障管理，负载平衡和低级系统维护。通过在OS继续运行的同时进行大部分移民，我们的服务最少的降低时间令人印象深刻。我们证明了整个OS实例在商品集群上的迁移，将服务的下降记录低至60ms。我们表明，即使对于运行交互式负载的服务器，我们的性能就足以使实时迁移成为实用工具。在本文中，我们考虑了针对数据中心和集群环境迁移OSS运行服务的设计选项。我们介绍和分析了可写的工作集的概念，并介绍了在Xen VMM顶部构建的高性能OS迁移的设计，实施和评估。
Migrating operating system instances across distinct physical hosts is a useful tool for administrators of data centers and clusters: It allows a clean separation between hard-ware and software, and facilitates fault management, load balancing, and low-level system maintenance. By carrying out the majority of migration while OSes continue to run, we achieve impressive performance with minimal service downtimes; we demonstrate the migration of entire OS instances on a commodity cluster, recording service downtimes as low as 60ms. We show that that our performance is sufficient to make live migration a practical tool even for servers running interactive loads. In this paper we consider the design options for migrating OSes running services with liveness constraints, focusing on data center and cluster environments. We introduce and analyze the concept of writable working set, and present the design, implementation and evaluation of high-performance OS migration built on top of the Xen VMM.