Grid Link Data Sources

GridLink data source can utilize runtime connection load balancing (RCLB) to allocate connections to the RAC instances. This can simplify the configuration of data source and increases the performance. 

WebLogic Server and Oracle RAC clusters are normally used together. Oracle RAC (real application clusters) is a module that helps the users on various machines to access a single database efficiently.

A GridLink data source can be used to connect the WebLogic Server and an Oracle database service. The database may include many Oracle RAC clusters. It also enables the administrators to manage the workload effectively. As the number of services increase in the database, you can scale the GridLink data sources.

GridLink data source can utilize runtime connection load balancing (RCLB) to allocate connections to the RAC instances. This can simplify the configuration of data source and increases the performance. 

The following figure illustrates the runtime connection load balancing:

The runtime connection load balancing helps the WebLogic Server in:

   Adjusting the allocation of the work based on CPU, response time and availability.

  Reacting to changes in the RAC topology.

  Managing the pooled connections and increasing the overall performance.

With ONS (oracle notification service), a GridLink data source can make use of Fast Connection Failover and reacts to all Oracle RAC events. So, a GridLink data source is very useful in:

   Detecting breakneck failures.

   Aborting and removing the worthless connections from the pool.

  Executing graceful shutdown for RAC node outages.

   Distributing all the runtime requests to active RAC instances.