Tutorial Module08 Archive: Difference between revisions
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<tt>“WARNING 2317 - For direct rainfall models set "Cell Wet/Dry Depth == 0.0002" if CME exceeds 1%.”</tt><br>
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As with all checks, warnings and errors, further information can be found on the [[
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In this optional section we will run the model using TUFLOW HPC (Heavily Parallelised Compute). TUFLOW HPC can run between 10 and 100 times faster than TUFLOW Classic using NVidia Graphics Processing Units (GPU)(depending on the model configuration and hardware performance). The speed of HPC makes it exceptionally well suited to high resolution direct rainfall urban applications. Large models with over 1,000,000 2D cells that take days to run using TUFLOW Classic can take hours to complete using TUFLOW HPC with high performance GPU hardware! The presentation "Rapid and Accurate Stormwater Drainage Assessments Using GPU Technology" highlights some performance test results comparing TUFLOW Classic against TUFLOW HPC for high resolution direct rainfall urban 1D/2D applications. A pdf copy of the presentation is available from the [https://www.tuflow.com/Download/Presentations/2017/Huxley2017_IECA-SQ%20Conference_Brisbane_pdf.pdf TUFLOW Library]<br><br>
''Note: If you have not previously used TUFLOW HPC, we recommend completing Tutorial Module 1, 2 and 3 before attempting this tutorial. The preceding tutorials include important lessons specific to using HPC, particularly its adaptive timestep / unconditional stability and GPU Hardware. Please see [[HPC_Features_Archive | HPC Features Archive]] for more information on TUFLOW HPC features supported in the 2017 release.<br><br>
In order to use the HPC solver, we will need to perform the following steps:
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=Troubleshooting=
If the TUFLOW simulation fails to start TUFLOW will output the error in a number of locations. Firstly, check the Console Window or the TUFLOW Log File (.tlf) (located in the '''TUFLOW\runs\log\''' folder). This file can be opened in a text editor and the error is generally located at the end of the file. You can however search for "Error" if you cannot see the error. In most cases there is also a spatial location for the error message (if the error reported in the log file is prefixed by XY:). To check the location of the geographic errors, open the '''_messages.mif''' or '''_messages_P.shp''' file in your GIS package.
This section contains links to some possible problems that may occur when progressing through the fourth tutorial module. If you experience an issue that is not detailed, please email
If you receive the following error when trying to run the TUFLOW HPC model using GPU hardware:
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