Visit

Installed versions

Resource	Version
Dardel/cpe23.12	3.4.0, 3.3.3

General information

How to use VisIt on PDC machines

VisIt is an open Source, interactive, scalable, visualization, animation and analysis tool. VisIt contains a rich set of visualization features to enable users to view a wide variety of data including scalar and vector fields defined on two- and three-dimensional (2D and 3D) structured, adaptive and unstructured meshes.

For more information, visit https://wci.llnl.gov/simulation/computer-codes/visit/ To view the versions of VisIt are installed at PDC log into the machine and type

module avail visit

We recommend using the latest version.

Note

Please note that the PDC module needs to be loaded before loading the visit module

How to use

Install local client

Download and install the 3.2.2 client for your operating system from https://visit-dav.github.io/visit-website/releases-as-tables/. It is important that the client version matches the server version on the cluster.

Configure client

Start the client and navigate to Options>Host profiles>New Host. In the Host Settings tab fill in the following: =================================== ========================================================= Field Value =================================== ========================================================= Remote host name dardel.pdc.kth.se Path to VisIt installtion /pdc/software/other/visit/3.2.2 Username Tunnel data connection through SSH yes SSH command ssh =================================== ========================================================= Go to the Launch Profiles tab and select New Profile. Give it a name, such as "CPU". Go to the "Parallel" tab and check Launch parallel engine and enter the following: =================================== ========================================================= Field Value =================================== ========================================================= Parallel launch method sbatch/srun Partition / Pool / Queue main Number of processors 128 Bank / Account Time Limit 00:20:00 =================================== ========================================================= Go to the Advanced tab and check Launcher arguments, and enter: --cpus-per-task=1 Now the settings are done! Press Apply and then Dismiss.

Run visualization

To visualize data on Dardel, navigate to Open file... and choose dardel.pdc.kth.se instead of localhost. Now you should see list of files in your home directory on Dardel. Select the file you want to visualize and click OK. Select the profile, and modify the parameters if necessary, then click OK again. Now VisIt puts a job in the queue and waits until it is started. Once the job starts, you can begin to visualize! Select plots and click Draw. The rendering will be done on the cluster, and then sent to your local client for display. To view the status of the remote compute engine on the cluster, navigate to File>Compute engines... Here you can also stop the job by clicking on Close engine. The latest visualization will be kept in your client even if the job hits the time limit or is closed. If you make some changes to the plots and press Draw, you will be asked if you want to start a new job.