6.1.2 ITSLM system configuration in a cluster system

To run ITSLM in a cluster system, the system configuration must satisfy the following conditions:

The logical hosts require a shared disk and logical IP addresses that can be inherited from the active server to the standby server. The shared disk and logical IP addresses must satisfy the conditions described in 6.1.1 Prerequisites for cluster system operations.
The same OS must be used throughout the cluster system. Failover between different OSs is not supported.
The cluster system must have an active-standby configuration.

This following subsections explain the system configuration for running ITSLM - Manager and ITSLM - UR in a cluster system.

Organization of this subsection

(1) System configuration for ITSLM - Manager
(2) System configuration for ITSLM - UR

(1) System configuration for ITSLM - Manager

This subsection explains a system configuration example for ITSLM - Manager in a cluster system. For details about the system configuration for JP1/Base in a cluster system, see the Job Management Partner 1/Base User's Guide. If you run JP1/Base with a cluster configuration, you must specify the logical host name of JP1/Base in the jbsHostName property in ITSLM - Manager's system definition file (jp1itslm.properties).

Figure 6‒1: System configuration example for ITSLM - Manager in a cluster system

ITSLM - Manager places the information that is to be inherited from the active server to the standby server in the event of a failover in shared folders on the shared disk. The files to be placed in the shared folders are created when an environment is set up for ITSLM - Manager on the logical host. If there are no shared folders when an environment is set up for ITSLM - Manager on the logical host, the setup command creates them.

A file system area for the database is placed on the shared disk. The name that is used for the folders is shown below.

Folder name for the database file system area:

shared-folder^#\JP1ITSLM\database

#: A different shared folder must be specified at setup for each logical host.

Only the ITSLM system information and performance data for monitored services are stored in the database file system area on the shared disk. The other file system areas used by ITSLM are created on local disks of the individual logical hosts.

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(2) System configuration for ITSLM - UR

The following figure shows an example of a system configuration for ITSLM - UR in a cluster system.

Figure 6‒2: System configuration example for ITSLM - UR in a cluster system

Note that ITSLM - UR uses the shared disk so that any access logs will be switched over to the standby server in the event of a failover. To determine whether a shared disk is required in the system configuration, check the cluster software specifications, as well as the destination path where the files than make up the access logs are to be recorded.

When ITSLM - UR is run in a cluster system, a network tap that copies HTTP packets passing through the switch's mirror ports is required between ITSLM - UR and the switch. The network tap copies the HTTP packets that pass the switch and sends them to the individual ITSLM - URs that make up the cluster system.

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