If youare using Oracle Internet Directory,
described later in this section, you do not need a TNSNAMES.ORA file.
Oracle Names service
Oracle Names was supported in earlier Oracle releases, providing a way to eliminate
the need for a TNSNAMES.ORA file on each client. That was the good part.
The bad part was that Oracle Names was a proprietary solution. Since Oracle
Internet Directory is based on standards and provides this functionality, Oracle
declared Oracle Names obsolete after the Oracle9i release.
Configuring Oracle Net | 65
Oracle Internet Directory
The need for a centralized naming service extends far beyond the Oracle
environment. In fact, there is a well-defined standard for accessing this type of
information, the Lightweight Directory Access Protocol (LDAP). As of the Oracle
Database 11g release, Oracle Internet Directory (OID) is a part of Fusion
Middleware, which is described in Chapter 15. OID is an LDAP-enabled directory
that can fulfill the same role as the previously available Oracle Names
service. The OID is also used for a variety of other purposes, such as enabling
single sign-on for the Oracle Application Server Portal product, also described in
Chapter 15.
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