Configuring Server Environment Using *.pvx XML Files
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When running pvserver/pvdataserver or pvrenderserver on a cluster, users may want to configure some environment variables eg. DISPLAY in case of multi-headed nodes for the processes. This can be done using the PVX configuration XML file.
Where to specify this?
- pvx file can be specified as the last command line argument for any of the server processes.
- Typically the pvx file is specified for all the executables whose environment is being changed using the pvx file. In case of data-server/render-server configuration, if you are setting up the environment for the two processes groups, then the pvx file must be passed as a command line option to both the executables: pvdataserver and pvrenderserver.
- When running in parallel the file is read on all nodes, hence must be present on all nodes.
Structure
<source lang="xml"> <?xml version="1.0" ?> <pvx>
<Process Type="server|dataserver|renderserver"> <Machine name="hostname" Environment="DISPLAY=m1:0" LowerLeft="-1.0 -1.0 -1.0" LowerRight="1.0 -1.0 -1.0" UpperLeft="-1.0 1.0 -1.0"> </Machine> </Process>
</pvx> </source>
- Only 2 vectors ([LowerRight - LowerLef] and [UpperLeft - LowerLeft]) are needed, the third vector is computed from these 2.
Cave Rendering
Instructions
- Turn on
PARAVIEW_USE_MPI
andPARAVIEW_USE_ICE_T
- run the servers using the pvx file:
mpiexec -np 2 pvserver cave.pvx
- start and connect a client
Notes
- See below for an example of a cave configuration file
<source lang="xml"> <?xml version="1.0" ?> <pvx>
<Process Type="client" /> <Process Type="server"> <Machine Name="Erna" Environment="DISPLAY=:0" FullScreen="0" ShowBorders="0" Geometry="1024x768+0+0" LowerLeft="-1 -1 -2" LowerRight="1 -1 -2" UpperLeft="-1 1 -2" /> <Machine Name="Erna" Environment="DISPLAY=:0" LowerLeft="1 -1 2" LowerRight="-1 -1 2" UpperLeft="1 1 2" /> </Process>
</pvx> </source>
- See vtkCaveRenderManager::ComputeCamera for more information on how the coordinates are used to configure the cameras
- The rendering on the server is full screen by default. If you want the windows to be smaller for debugging, set the environment variable PV_ICET_WINDOW_BORDERS=1 on the client machine.