Software: Apache. PHP/5.5.15 uname -a: Windows NT SVR-DMZ 6.1 build 7600 (Windows Server 2008 R2 Enterprise Edition) i586 SYSTEM Safe-mode: OFF (not secure) E:\oracle\product\10.2.0\client_2\NETWORK\tools\help\ca\help\ drwxrwxrwx |
Viewing file: Database_ID_by_Service_Name.htm (8.59 KB) -rw-rw-rw- Select action/file-type: (+) | (+) | (+) | Code (+) | Session (+) | (+) | SDB (+) | (+) | (+) | (+) | (+) | (+) | Database Identification by Service NameAn Oracle database is represented to clients as a service, that is, the database performs work on behalf of clients. A database can have one or more services associated with it. Up to Oracle8i, an Oracle database service was uniquely identified by an Oracle System Identifier (SID). The SID was also used internally by the database as a pointer to the System Global Area (SGA). Clients connected to a database instance by specifying the SID in the connect descriptor. This naming scheme did not distinguish services from instances. Because an Oracle database can span over multiple computers, both the service as a whole and each of its instances are specified in Oracle8i and later release databases. Service NameA database is identified by its service name. The service name is specified by the SERVICE_NAMES parameter in the initialization parameter file. SERVICE_NAMES specifies the name of the highest-level view of Oracle database service, that may span instances and/or nodes. SERVICE_NAMES is defaulted to the global database name, a name comprised of the database name and domain name. Instance NameDatabase instances are identified by an instance name with the INSTANCE_NAME parameter in the initialization parameter file. INSTANCE_NAME corresponds to the SID of the instance. Connect DescriptorsConfigure connect descriptors with the SERVICE_NAME
(without an S) parameter to connect to an Oracle8i
and later release database. For example, the following connect descriptor
contains the address of a listener located on sales-server
listening for connection requests for a database service called
Optionally, connect descriptors can be configured with the INSTANCE_NAME parameter to connect to a particular instance of the database. This may be necessary if you have an Oracle Real Application Clusters configuration with multiple instances. For example, the following connect descriptor contains the address of a listener located on sales-server listening for connection requests for an instance called sales associated with the sales.us.acme.com database:
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