The job creation is generally done on the user's workstation. To avoid the user having to program a complete shell script for each job with all the desired operations himself and to adapt it accordingly each time changes are made, it is recommended to use a job creation tool, this reduces the effort considerably.
The concept of JGen and X-JGen
The JGen/X-JGen Jobmaker aims to meet exactly these requirements with a two-stage concept. The JGen is the central element of job creation and can be called from the command line in various modes. X-JGen offers the corresponding graphical user interface and controls the JGen itself via the command line. For each CAE application there is a plugin module that extends the functionality of JGen and X-JGen to create jobs for that application. This strictly modular structure allows a flexible adaptability to any application infrastructure and furthermore guarantees the possibility of a step-by-step introduction and easy dynamic extensibility for any new CAE software package.
The connection to the batch-queueing system is designed to be just as flexible. Supports for LSF, Sun Grid Engine and PBS are already integrated, more are planned. A special feature is that even several queueing system installations can be controlled in parallel (e.g. two LSF instances or if the previous environment runs with LSF and the new cluster already has a Sun Grid Engine installation). The application possibilities are great.
The parameter sets of a job can be stored in different formats depending on the desired mode of operation. The JGen and X-JGen are also closely connected to each other.
The job-file is the shell script that is submitted and executed directly to the queuing system when a job is submitted. There all options can be checked once again. The jdefs-file offers the possibility to store all parameters of a JGen call in one file. The JGen can then create as many jobs with the same options as desired, whereby the correctness of the input deck is checked each time. Therefore the jdefs-file can be edited without any problems to modify the job options.
The xdefs-file can be used to save and reload the current settings of the X-JGen mask to restore certain settings. This file can also be edited safely, since only those entries are read that make sense for the current mask. The custom.defs-file allows the user to customize the system-wide default values of all JGen parameters individually. Both JGen and X-JGen get their customizing information from this file.
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