Database - RAC/Scalability (MOSC)

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Regarding failover when instance stops & Tomcat

edited Feb 2, 2012 4:39AM in Database - RAC/Scalability (MOSC) 3 commentsAnswered
In the " Oracle® Database 2 Day + Real Application Clusters Guide", in the section "Configuring Clients for High Availability" is the following paragraph:  "There are two central elements to consider when automating failover for application clients. First, clients that are connected at the time of failure must be quickly and automatically notified that a failure has occurred to avoid waiting for TCP/IP network time-outs before attempting to connect to the new database instance (such time-outs range anywhere from 8 minutes to 2 hours, depending on operating system). Oracle RAC configurations utilize Fast Application Notification (FAN) to notify JDBC clients, OCI clients, and ODP.NET clients. FAN event notifications and callouts enable automatic and fast redirection of clients in the event of a site failure.

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