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DISTRIBUTED NAME SERVERS: NAMING AND CACHING IN LARGE DISTRIBUTED COMPUTING ENVIRONMENTS

机译：分布式名称服务器：在大型分布式计算环境中的命名和跟踪

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摘要

Name services facilitate sharing in distributed environments by allowing objects to be named unambiguously and maintaining a set of application-defined attributes for each named object. Existing distributed name services, which manage names based on their syntactic structure, may lack the flexibility needed by large, diverse, and evolving computing communities. A new approach, structure-free name management, separates three activities: choosing names, selecting the storage sites for object attributes, and resolving an object's name to its attributes. Administrative entities apportion the responsibility for managing various names, while the name service's information needed to locate an object's attributes can be independently reconfigured to improve performance or meet changing demands.;An analytical performance model for distributed name services provides assessments of the effect of various design and configuration choices on the cost of name service operations. Measurements of Xerox's Grapevine registration service are used as inputs to the model to demonstrate the benefits of replicating an object's attributes to coincide with sizeable localities of interest. Additional performance benefits result from clients' acquiring local caches of name service data treated as hints. A cache management strategy that maintains a minimum level of cache accuracy is shown to be more effective than the usual technique of maximizing the hit ratio; cache managers can guarantee reduced overall response times, even though clients must occasionally recover from outdated cache data.
机译：名称服务通过允许对对象进行明确命名并为每个命名对象维护一组应用程序定义的属性，从而促进了在分布式环境中的共享。现有的基于名称的句法结构管理名称的分布式名称服务，可能缺少大型，多样化和不断发展的计算社区所需的灵活性。一种无结构名称管理的新方法将三个活动分开：选择名称，选择对象属性的存储位置以及将对象名称解析为其属性。管理实体分配管理各种名称的责任，而定位对象属性所需的名称服务信息可以独立重新配置以提高性能或满足不断变化的需求。分布式名称服务的分析性能模型可评估各种设计的效果以及名称服务运营成本方面的配置选择。施乐的Grapevine注册服务的度量值用作模型的输入，以证明复制对象的属性以与感兴趣的较大地点一致的好处。客户端获取名称服务数据的本地缓存作为提示可以带来更多的性能优势。事实证明，保持最小缓存精度水平的缓存管理策略比使命中率最大化的常规技术更为有效。即使客户端必须偶尔从过时的缓存数据中恢复，缓存管理器也可以确保减少总体响应时间。

著录项

  • 作者

    TERRY, DOUGLAS BRIAN.;

  • 作者单位

    University of California, Berkeley.;

  • 授予单位 University of California, Berkeley.;
  • 学科 Computer science.
  • 学位 Ph.D.
  • 年度 1985
  • 页码 220 p.
  • 总页数 220
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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