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| | Using Oracle Real Application Clusters (RAC): ODBC: Developer: Home |
 | | Because the requested listener selects from a set of active instances in the RAC system to forward connection requests to, it should not route the connection request to an instance that is not running. |
 | | For example, suppose you have the Oracle RAC environment shown in Figure 3 with multiple connections to Oracle RAC nodes: A, B, and C. As shown in the first case, connections are distributed among the nodes in an Oracle RAC system. |
 | | Suppose you have the Oracle RAC environment shown in Figure 4 with multiple Oracle RAC nodes, A, B, C, and D. Without client load balancing enabled, connection attempts may be front-loaded, meaning that most connection attempts would try Node A first, then Node B, and so on until a connection attempt is successful. |
| www.datadirect.com /developer/odbc/odbc_oracle_rac/index.ssp (2181 words) |
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