1Z0-599 Question #48: Real Exam Question with Answer & Explanation

The correct answer is C. The Transaction Affinity feature of Active GridLink for RAC. XA Affinity and Failover When accessed within a global transaction, the member data source from which the JDBC connection was obtained is pinned to the global transaction for the life of the transaction. This ensures that all database operations performed on connections obtained

Question

A customer has a critical, performancesensitive web application that connects to a multinode Oracle RAC database. Which feature of WebLogic can provide significant performance benefit?

Options

AThe Web Session Affinity feature of Active GridLink for RAC
BWebLogic Clustering
CThe Transaction Affinity feature of Active GridLink for RAC
DCoherence*Web Session Replication

Explanation

XA Affinity and Failover When accessed within a global transaction, the member data source from which the JDBC connection was obtained is pinned to the global transaction for the life of the transaction. This ensures that all database operations performed on connections obtained from the Multi Data Source, for a particular transaction, all execute on the same RAC instance. XA affinity results in improved performance and is even a requirement for older versions of RAC, such as prior to 11g. The XA failover is also supported by the Multi Data Source and transaction manager implementations. If a pinned RAC instance suffers a failure, then a global transaction can complete utilizing a different RAC instance using a connection obtained one of the other member

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