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最初由 seaton 发布
[B]看文档终于找到答案了,原来是Service registration。
Service registration offers the following benefits:
* Simplified configuration
Service registration reduces the need for the SID_LIST_listener_name parameter setting, which specifies information about the databases served by the listener, in the listener.ora file.
Note:
The SID_LIST_listener_name parameter is still required if you are using Oracle Enterprise Manager to manage the database.
* Connect-time failover
Because the listener always knows the state of the instances, service registration facilitates automatic failover of the client connect request to a different instance if one instance is down.
In a static configuration model, a listener would start a dedicated server upon receiving a client request. The server would later find out that the instance is not up, causing an "Oracle not available" error message.
* Runtime connection load balancing
Service registration enables the listener to forward client connect requests to the least loaded instance and dispatcher or dedicated server. Service registration balances the load across the service handlers and nodes. [/B]
这个就是service_name的概念啊。。好像9i就有了。。 |
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