11.1.3 Configuration of a disaster recovery system compatible with JP1/AJS3

(1) Conditions for disaster recovery environments

A disaster recovery environment for JP1/AJS3 must satisfy the following conditions:

• The hosts at the main site and remote site must be running the same operating system and version. Both hosts must also run the same versions of JP1/AJS3 - Manager and its prerequisite JP1/Base, which must be installed in the equivalent drive and folder on each host.

  For details about the prerequisite operating systems and programs for JP1/AJS3, see 2.1.2 JP1/AJS3 prerequisites in the JP1/Automatic Job Management System 3 System Design (Configuration) Guide.

• The machines at the main site and remote site must have similar specifications.

  To allow work task activity to continue seamlessly after operation is switched, we recommend that you use machines with similar specifications for the manager hosts at the main site and remote site. While there is no need for the specifications to be identical provided that both meet or exceed the system requirements for JP1/AJS3, consider the processing performance after switching operation when designing the disaster recovery system.

• The language types (for example the LANG environment variable) used by JP1/AJS3 and JP1/Base must be the same at the main site and remote site.

• The hosts at the main site and remote site must share the same date and time settings.

• JP1/Base must have the same configuration at the main site and remote site.

• The names of the agent hosts used at the main site must be resolvable from the remote site.

  If the names of the agent hosts in use by the main site cannot be resolved at the remote site, the system might take a long time to start disaster recovery operation when operation is switched to the remote site, or connections to the agent hosts might time out. For this reason, the remote site must have jp1hosts, jp1hosts2, or hosts files or a DNS configuration that allows it to resolve the host names correctly. For details about the jp1hosts or jp1hosts2 file, see the JP1/Base User's Guide.

• To use the same logical host name for the main site and remote site, the main site and remote site must be in a one-to-one correspondence.

Supplementary note

Depending on the method used to connect the main site to the remote site, a LAN connection might be required between the hosts. Depending on the hardware, you might also need to install software to take advantage of the disk copy and mirroring functionality of the shared disks.

For details, see the documentation for the hardware you are using.

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(2) Example system configuration

An example configuration of a JP1/AJS3 disaster recovery system is described below.

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