Editing CFD Job Scheduler

# Introduction [[image:scheduler_pseudo_algo_flow]] This is a Python script for a portable, scalable job scheduler with multiple priorities - for ANSYS CFX simulations. The script was designed to be called every minute by an external scheduler program. - In the practical case, the free version of the software [System Scheduler](https://www.splinterware.com/products/scheduler.html) was used to deploy the script successfully, for over 3 years, managing 2 computing clusters. Once called, the program basically loops through pre designated folders and lists .def files based on the *last modified* date available in Windows. The system interaction is via BASH scripts created via the Python code, as well as the python OS library. There are several in-built flags to support priority, pausing a particular cluster, logging data and troubleshooting. The idea behind the project was to create a multi-platform job scheduler for ANSYS CFX that has a balance between sophistication and ease of deployment (and management). Typically job schedulers and load balancing programs are relatively very sophisticated and complex to setup with several pre-requisites and constraints. Such complexity dictates expensive commercial support and licensing considerations. **[Code On Github](https://github.com/shrysr/jobscheduler)** **[Presentation](https://shrysr.github.io/jobscheduler/index.html)** **[Wiki on Github](https://github.com/shrysr/jobscheduler/wiki)** # Problem Statement A job scheduler or simulation management system was required to address the following: - Optimum and continuous simulation solver license utilisation by all members of the team in a First-In-First-Out (FIFO) basis, - Provision for dynamic or urgent priority jobs, as well as an interface to submit simulations or view job history. - Optimisation and management of workload of simulation jobs facilitating overall project management and planning. # What the program accomplished - Allowed users to submit simulations by simply placing the input files in a particular folder location, which also served as a particular priority basket. - Removed the need of creating manual scripts to submit multiple simulations and resolved inefficient license utilisation approaches. - Facilitated a optimised approach to certain design cases, thus resulting in a 75% reduction in simulation time - Enabled the use of consistent solver and memory utilisation parameters and settings, allowing efficient deployment and reducing inefficiencies due to errors. - Allowed optimal or perfect utilisation of available licensing scheme, resulting in a significant increase in team output and productivity. # Tools used and links - Written with Python 2.7, using portable python, Spyder, Notepad ++ and Sublime Text 3. - [System Scheduler](https://www.splinterware.com/products/scheduler.html) Tags: [[tag:CFD]], [[tag:project]], [[tag:python]]

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