This subsection describes the configuration with one machine in the standby node for N machines in the executing nodes (server exclusive for recovery). This configuration is called an N-to-1 recovery system.
This is a system configuration for resolving the transaction and releasing the resources when there is a problem in certain J2EE server and a global transaction is used in a configuration with redundant J2EE servers. Use load balancer to create redundant J2EE servers for N machines.
The prerequisites of this configuration are as follows:
Application Server is subject to node switching in N-to-1 recovery system.
The resource adapters used in executing node are required for standby node as well when configuring N-to-1 recovery system. The following three types of configurations are described as an example for allocation of resource adapters and relation with system configuration:
The following are the examples of respective configurations:
Figure 3-58 Example of system configuration of N-to-1 recovery system (when configuration of J2EE applications and resource adapters is same for N executing node machines)
Note: For other legend items, see 3.2 Description of the system configuration.
Figure 3-59 Example of system configuration of N-to-1 recovery system (when configuration of J2EE applications differ and all resource adapters are identical for N executing node machines)
Note: For other legend items, see 3.2 Description of the system configuration.
Figure 3-60 Example of system configuration of N-to-1 recovery system (when configuration of J2EE applications and resource adapters differ for N executing node machines)
Note: For other legend items, see 3.2 Description of the system configuration.
This subsection describes the required software and processes of the respective machines.
You must install Application Server on the Application Server machine in the executing node.
The processes that must be started for using cluster software are as follows:
The required software and the processes to be invoked in the Application Server machine are different for each system configuration, depending on the used functions. Allocate the required software and the processes depending on the used functions.
You must install Application Server on the Application Server machine in the standby node.
Also, import all the resource adapters imported by J2EE server on Application Server machine of executing node.
The Application Server machine of standby node is in cold standby status.
However, the process does not start unless node switching takes place. When node switching is performed, the J2EE server process is started in recovery mode.
You must install Application Server on the Management Server machine.
Invoke the following process:
You must install the following software on Client machine: