Oracle Forms N+M Redundancy Oracle Forms Virtual Machines Oracle Forms Configuration Cloning Oracle Forms Process Failures Oracle Forms Node Failures Oracle Forms WebLogic Managed Server Failures

14-22 Oracle Fusion Middleware High Availability Guide active-passive deployment, and was required to be started, and the load balancer had to be reconfigured manually, the downtime would be longer. 14.4.2.2 Oracle Forms N+M Redundancy For added failover capacity more than one standby machine can be used. That is usually referred to as N+M. The chance of more than one machine failing at the same time or close to the same time is significantly smaller, but if there is a requirement to be able to handle that situation, a N+M setup is possible and perhaps called for. For redundancy in the case of a condition that affects all the machines in the deployment, perhaps a natural disaster that destroys all machines in one location, this deployment can be duplicated in two different geographical locations.

14.4.2.3 Oracle Forms Virtual Machines

In a datacenter that uses virtual machines, the standby machine can be brought online using any spare hardware and thus be implemented very cheaply.

14.4.2.4 Oracle Forms Configuration Cloning

The significance of cloning the environment becomes apparent when studying the scenarios described in the previous sections. All changes done to one machines environment must also be present on all other machines, including the standby machine. This can present a practical problem, especially if the spare machine is virtual. The image that is the virtual machine must be kept in sync with the changes made to the other machines.

14.4.2.5 Oracle Forms Process Failures

For information about Oracle Forms process failure, see Section 14.1.3.1, Oracle Web Cache and Oracle HTTP Server Process Failures.

14.4.2.6 Oracle Forms Node Failures

For information about Oracle Forms Node failure, see Section 14.1.3.2, Common Component Node Failures.

14.4.2.7 Oracle Forms WebLogic Managed Server Failures

For information about Oracle Forms WebLogic Managed Server failure, see Section 14.1.3.3, Common Component WebLogic Managed Server Failures.

14.4.2.8 Oracle Forms Database Failures