In openFT you can run multiple openFT instances on one computer simultaneously. Because of these instances, should a computer fail, you are in a position, for example, to carry over the functionality of the openFT to another computer of a SYSPLEX configuration, which is already running openFT.
Following openFT installation, it is first necessary to use FJGEN to set up an instance. If you do not specify an instance name here then STD is used for the standard instance.
Up to 16 additional instances can be created by administration. Each of these instances, including the standard instance, consists of the following components:
The request file SYSRQF, the partner list SYSPTF, the logging file SYSLOG, trace files, options SYSOPF and the profile file SYSFSA.
Each instance requires its own network address; this always remains the same, independent of the real host.
Therefore, the name of the host on which an instance is running is specified in the FJGEN command. This host name must always be accessible under the same network address.
The openFT installation files are only available once per computer and are shared by all the instances. The same version, however, must be installed on all the computers in the cluster (openFT version, release version, PTFs, etc.).
openFT commands that are called during a preprocessing, postprocessing or follow-up processing session, run under the same instance as the request that initiated the processing.