Configuring Grid Link Data Source for Dept1_Cluster1
Grid Link Data Source
A Grid Link data source includes the features of generic data sources plus the following support
for Oracle RAC:
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“Fast Connection Failover” on page 235
■
“Runtime Connection Load Balancing” on page 235
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“XA Affinity” on page 236
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“SCAN Addresses” on page 236
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“Secure Communication using Oracle Wallet” on page 236
Fast Connection Failover
A Grid Link data source uses Fast Connection Failover to:
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Provide rapid failure detection.
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Abort and remove invalid connections from the connection pool.
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Perform graceful shutdown for planned and unplanned Oracle RAC node outages. The
data source allows in-progress transactions to complete before closing connections. New
requests are load balanced to an active Oracle RAC node.
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Adapt to changes in topology, such as adding a new node.
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Distribute runtime work requests to all active Oracle RAC instances.
See Fast Connection Failover in the Oracle Database JDBC Developer's Guide and Reference
at: http://docs.oracle.com/cd/B19306_01/java.102/b14355/fstconfo.htm.
Runtime Connection Load Balancing
Runtime Connection Load Balancing allows WebLogic Server to:
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Adjust the distribution of work based on back end node capacities such as CPU, availability,
and response time.
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React to changes in Oracle RAC topology.
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Manage pooled connections for high performance and scalability.
If FAN (Fast Application Notification) is not enabled, Grid link data sources use a round-robin
load balancing algorithm to allocate connections to Oracle RAC nodes.
Configuring Exalogic Software 235
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