[Paraview] Run Paraview sort-last on several graphics devices in the same machine

[Qinghuai Gao]

A quick question on how to run paraview with sort-last on several
graphic devices in the same machine.  Should I use the MPI version, or
the client-server model?  How can I provide the graphic card device name
to Paraview render servers, or Paraview servers?  Thanks,

Qinghuai