Coda:分布式工作站环境的高可用性文件系统

M. Satyanarayanan, James J. Kistler, Puneet Kumar, Maria E. Okasaki, E. Siegel, D. Steere
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引用次数: 1133

摘要

介绍了一种用于Unix工作站组成的大规模分布式计算环境的文件系统Coda。它通过使用两种不同但互补的机制为服务器和网络故障提供弹性。其中一种机制是服务器复制,它涉及在多个服务器上存储文件的副本。另一种机制,即断开连接操作,是一种执行模式,在这种模式中,缓存站点暂时承担复制站点的角色。断开连接操作对于支持便携式工作站特别有用。Coda的设计优化了可用性和性能,并提供了最高程度的一致性。原型的测量表明,在Coda中提供高可用性的性能成本是合理的
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Coda: a highly available file system for a distributed workstation environment
A description is given of Coda, a file system for a large-scale distributed computing environment composed of Unix workstations. It provides resilience to server and network failures through the use of two distinct but complementary mechanisms. One mechanism, server replication, involves storing copies of a file at multiple servers. The other mechanism, disconnected operation, is a mode of execution in which a caching site temporarily assumes the role of a replication site. Disconnected operation is particularly useful for supporting portable workstations. The design of Coda optimizes availability and performance and provides the highest degree of consistency attainable. Measurements from a prototype show that the performance cost of providing high availability in Coda is reasonable.<>
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