5.9.2 Configuring a logical host in a non-cluster environment

(1) Preparing the logical host environment

To create the logical host environment, prepare the disk area and IP address for each logical host.

• Disk area for the logical host

  Create a directory on the local disk, different from that used by JP1 programs on the physical host or any existing logical host, for sole use by JP1 on the logical host you are configuring.

• IP address for the logical host

  Have the OS allocate an IP address to the logical host.

  You can use a real IP or an alias. However, make sure that the IP address can be uniquely resolved from the logical host name.

  The prerequisites for the logical host environment are the same as for running JP1 in a cluster system. However, because the logical host does not fail over, some requirements do not apply, such as the ability to inherit data between servers.

Note that the descriptions in 5. Setting Up JP1/Base for Use in a Cluster System about shared disks and logical IP addresses when setting up a cluster system should be understood as the disk area and IP address allocated in the steps above for a non-cluster environment.

• Performance estimation

  Take the following points into consideration when you estimate whether system resources are adequate:

  • Estimate whether sufficient resources can be allocated within the system to allow multiple instances of JP1 to start. If the system has insufficient resources, it might not operate correctly or performance might be degraded.

  • When you set the total number of JP1 events or JP1/AJS jobs that are permitted to start concurrently among all of the logical hosts, do not exceed the amount of application traffic that the physical host can handle. Keep in mind that starting multiple JP1 programs on separate logical hosts does not provide a proportionate increase in processing capacity.

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(2) Setting up JP1 in the logical host environment

Set up JP1 in the logical host environment in the same way that a primary server is set up in a failover cluster system. For a failover cluster system, setup must be performed on both servers. For a non-failover environment, you only set up JP1 on the server where it will run.

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(3) Setting up automatic startup and automatic termination in a logical host environment

The settings for automatic startup and automatic termination are not specified when you set up JP1 for a logical host environment. To specify these settings, see 5.9.3(2) Examples of setting up automatic startup and automatic termination.

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