Concepts & Terminology
View Code Database ServicesService Name A logical representation of a database The way a database is presented to clientsConnect Descriptor Location of the database Name of the database serviceListener Receives client connection requests Hands requests to the database server
Overview of Naming Methods
Naming methods are used by a client application to resolve a connect identifier to a connect descriptor when attempting to connect to a database service.
Oracle Net provides five naming methods:
- Host naming
- sqlplus HR/HR@192.168.1.200:1521/poli //这种方法已经过时了
- Local naming
- sqlplus HR/HR@DB200
- Directory naming //大规模数据的使用
- Oracle Names //过时
- External naming //第三方使用
Configuration Files
- ldap.ora
- names.ora
- tnsnames.ora
- listener.ora
- sqlnet.ora
Three Key Parameters
- Connect Descriptor
- Location of the database
- Name of the databse service