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WADE系统的多级分布式对象命名体系的设计与实现
引用本文:桂小林,钱德沛,董小社,许大炜.WADE系统的多级分布式对象命名体系的设计与实现[J].计算机研究与发展,2002,39(4):423-428.
作者姓名:桂小林  钱德沛  董小社  许大炜
作者单位:西安交通大学计算机科学与技术系,西安,710049
基金项目:国家“八六三”高技术研究发展计划项目(2001AA111081;863-306-ZT01-06-2),西安交通大学博士基金项目
摘    要:WADE是一个基于校园网络的面向对象的元计算系统,通过分布式对象模型实现广域异构资源的一致管理,提出了一种4级对象层次结构支持模型的组织与实现,对象命名代理负责用户与系统的接口,映射用户对象标识符UOID到系统对象标识符SOID,对象通信代理为对象绑定通信地址,建立通信对象标识符COID,对象存储管理器则负责对象的惰性保存,并通过永久对象标识符POID识别惰性对象,WADE采用了双Cache缓冲机制,有利于提高对象的操作与通信性能。

关 键 词:WADE系统  多级分布式对象  对象命名  设计  层次结构  元计算系统  校园网络

DESIGN AND IMPLEMENTATION OF A DISTRIBUTED OBJECT NAMING HIERARCHY FOR THE METASYSTEM WADE
GUI Xiao-Lin,QIAN De-Pei,DONG Xiao-She,Xu Da-Wei.DESIGN AND IMPLEMENTATION OF A DISTRIBUTED OBJECT NAMING HIERARCHY FOR THE METASYSTEM WADE[J].Journal of Computer Research and Development,2002,39(4):423-428.
Authors:GUI Xiao-Lin  QIAN De-Pei  DONG Xiao-She  Xu Da-Wei
Abstract:WADE is an object-oriented metacomputing system developed by the authors on a networked campus. The WADE distributed object model (WDOM) provides dependable and consistent access to wide area resources with heterogeneity on WADE. WDOM is implemented using a four-level object naming hierarchy. Firstly, the user-level objects are mapped by object naming agents to system-level, unique, location-independent names called SOID. And then, if communication between hosts is essential, system-level objects will be bound to communication-level names called COID. Finally, objects in inert are stored into the persistent storage devices such as hard disks with object identifier named POID. The object names such as SOID and COID are cached in term of LRU strategy so that the efficiency of the object operations is improved. Some tests show that the object naming hierarchy can improve expansibility and efficiency of metasystems.
Keywords:object naming  hierarchy  distributed object techniques  object management  metasystem
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