Hello, Recently I create unstructure mesh from Gmsh and its mesh format is msh file. However the mesh file contain around 100 million nodes, so when I use DMPlexCreateFromFile it only perform on a single CPU process thus out of memory.
I ask GPT and it said PETSc may parallel perform DMPlexCreateFromFile when the mesh file is HDF5/Exodus II/XDMF, so it will decrease the Memory pressure for each CPU process. So I sent this email for asking help that how can I load such large-scale mesh to create DMPLEX. Looking forward to your reply! sinserely, Cheng.
