Contents • • • • • • • • • • • • • • • [] Getting Started This tutorial will be hands on, running VisIt in client / server mode with the client running on the desktop and the server running on the Cori system at NERSC. We will be using the standard version of the 2.13.2 client and a pre-release version of VisIt on Cori. You will first need to configure VisIt on your desktop to connect to the pre-release version of VisIt on Cori. Cod4 serial number for mac. • Download version 2.13.2 on your system. • Install VisIt 2.13.2 on your system.
• When installing VisIt on a Windows or Linux system, you will be prompted if you would like to choose a system configuration file. Choose NERSC network. • If you have already installed VisIt or are installing VisIt on a Mac, you can install the system configuration when you run VisIt. [] Starting VisIt The way you start VisIt depends on the platform you are on: • On Windows, double click on the VisIt desktop icon • On Mac, double click on the VisIt icon where you installed it (generally in the /Applications folder). • On Unix, invoke: /path/to/visit/bin/visit • Most people ultimately put /path/to/visit/bin in their $PATH and then just say visit.
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[] What you see • The tall grey window on the left is called the 'GUI'. It is the primary mechanism for driving VisIt. • The window on the right is call the 'visualization window'. It displays results.
[] Installing the system configuration If you have not already installed the NERSC system configuration, do so now. • Select Options->Host profiles and Configuration Setup. From the main menu. Download imovie for pc. • This brings up the Setup Host Profiles and Configuration window. • Select National Energy Scientific Research Computing Center (NERSC) network from the list of computing centers. • Click Install. • Select Options->Save Settings.
• Restart VisIt. • Select Options->Host profiles. From the main menu. • Select NERSC Cori from the Hosts list. • Change the Path to VisIt installation to /project/projectdirs/visit/bout_workshop/visit. • Change the Username to your username at NERSC. • Click Apply.
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• Select Options->Save Settings. [] Opening files The first thing to do is to open a solution file. • Go to the main GUI window and click on the Open icon. • This brings up the File open window.
• Change the Path field to be /project/projectdirs/visit/bout_workshop/data1. • Change the Filter field to be *.nc. • Highlight the file te_DIIID1_nosheath_t770.nc. • You will now be prompted to launch a compute engine. • It is best to set the number of processors to match the number of blocks in the grid. In this case we know that the grid has 4 blocks so we use that.
If you use a smaller number VisIt won't operate as quickly and if you use a larger number you are wasting resources since VisIt can't make use of more processors than blocks. • Change Num procs to 4, Num nodes to 4 and Time limit to 00:60:00. You've opened the file! [] The grid structure Now let's explore how VisIt decomposes your grid data with the Subset plot. • You can create a Subset plot by clicking on the Add icon. It is located about half way down the main GUI window.
• Select Subset->domains(mesh) from the Add icon to add a Subset plot. • Click Draw on the main GUI window. • This will display each block in the grid a different color. • You can see the internal structure of the grid by adding the Clip operator to remove a portion of the grid. • You can add operators by clicking on the Operators icon. It is located next to the Add icon.