Oracle which listener.ora

First the request is sent to listener running on the target database and then the connection is established. On target server that you want to connect , both listener and database must be up and running. Else, connection will not establish. Below is a completed tnsnames. There is not restriction as to how many connections you can add to tnsnames. For example if you want to add multiple database connection entries, you file will look like below. Now that you have added tns entries to the file, let's connect remote database.

Further Read. Local naming parameters tnsnames. This file will also be present on the server if client style connections are used on the server itself. Here is an example of a "tnsnames. The alias used at the start of the entry can be whatever you want. It doesn't have to match the name of the instance or service. You can check the available services by issuing the lsnrctl status or lsnrctl service commands on the database server.

The "sqlnet. This file will also be present on the server if client style connections are used on the server itself, or if some additional server connection configuration is required. Here is an example of an "sqlnet. There are lots of parameters that can be added to control tracing, encryption, wallet locations etc. These are out of the scope of this article.

The OS hostname command must return the correct hostname of your database server. The listener configuration is stored in the configuration file named listener. Because all of the configuration parameters have default values , it is possible to start and use a listener with no configuration.

The listener forwards client requests to supported services. These services can be configured statically in the listener. This dynamic registration feature is called service registration.