Client-server networks have grown tremendously since the mid--l980s. The information they store changes much more rapidly than it did during the time at beginning. The size and complexity of these networks required new, autonomous administration prac- tices. Network Information Services was designed to address these requirements. As one of the network information services, NIS+ is a widely used network protocol. It allows networked machines to have a common interface regardless of the workstation that a user logs into. NIS+ keeps all information into tables to support a common inter- face between networked machines. In the most of case these information are controlled by centralized manner. Centralized management of NIS+ tables in large systems is a tedious and costly task. An appealing possibility is to use role and role hierarchy to facilitate decentralized administration of NIS+ tables which has not been previously rec- ognized in the literature. This paper presents decentralized administration of NIS+ tables using the notion of role and also shows how to simulate role hierarchy in NIS+ groups.
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