JDBC Clustering
You can cluster JDBC data sources and multi data sources for high availability purposes. When you configure the data sources, you must target them to the entire cluster instead of targeting them to some members of the cluster. Once you do this, the data sources are cluster-aware and the server creates an instance of the data source on all members of the cluster. WebLogic Server handles external and server-side client connections differently. WebLogic Server doesn't automatically fail over JDBC connections when a server instance dies. When the server instance fails, the JDBC connection will die as well and the applications must restart their in-flight transactions. However, by configuring the cluster-aware JDBC multi data source, ...
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