Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
I am configuring a WebLogic app server. I am unclear about what is an instance connection and what is a service connection.
Also, in my SQL Developer, when I make a new connection, it asks for either an SID or a Service Name. What are they?
An instance connection is a TNS connection to a specific instance on a host.
A service connection is to a particular service that a listener on a host knows about.
The two are often used interchangeably, but the SERVICE connection is more flexible. I can configure multiple instances to register as the same service name to the listener, allowing load balancing and behind the scenes replacement of databases transparently to users. If an instance connection is specified, that particular instance must be up and available or the connection will be refused.