[petsc-users] Data types for local ID's and global ID's for large problems

[Weston, Brian Thomas]

Does PETSc have different data types for local ID’s and global ID’s? For example, if PETSc is configured for 32-bit indices on very large problems with say 10 billion degrees of freedoms (exceeding the limit of 32-bit indices for a global ID) would it crash and require us to re-compile with 64-bit indices or can it gracefully handle this?

Sincerely,
Brian
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