[petsc-users] Out of memory for using DMPlexCreateFromFile when load large-scale mesh

[程奔]

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.
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