April 1999
Intermediate to advanced
584 pages
23h 17m
English
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Oracle Names
The process of resolving a service name (or database alias or global name) into a server’s physical address is known as name resolution. While the information needed to perform name resolution between service names and specific Oracle instances and hosts is normally maintained in the tnsnames.ora file, that approach requires propagation of modifications to tnsnames.ora across the enterprise whenever there is a change to any component. This may be inconvenient or even impossible in installations where changes occur often or where coordination of tnsnames.ora files is difficult. To solve this problem, Oracle developed a product called Oracle Names, which provides dynamic resolution of service names through the use of an Oracle Names server. By using Oracle Names, a network node only needs to know how to connect to the Oracle Names server, which then resolves any service names without a need for tnsnames.ora. In addition, Oracle Names is able to integrate with many native naming services, such as Network Information Services (NIS), Novell NetWare Directory Services (NDS), and Banyan Vines StreetTalk.
The Oracle Names method for name resolution has a number of positive attributes. This method:
Resolves service names quickly
Allows central control of service names and corresponding physical attributes (e.g., hosts and instance names)
Provides dynamic access to modified locations
Provides fault tolerance by supporting multiple name servers
In order to use Oracle Names, one or more ...
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