Mumps out-of-core option

Linear Algebra
1

Hi all,

I am currently using Mumps to solve a large system (DoFs=50 millions). As we all known, mumps will use a huge memory. I found online that mumps can use the ‘out-of-core’ technique to save the data to hard disk and re-load them if needed. Does anyone know how to set ‘out-of-core’ for Mumps in FEniCS?

Thanks in advance,
Leon

2

https://petsc.org/release/docs/manualpages/Mat/MATSOLVERMUMPS.html

Specifically:

	-mat_mumps_icntl_22	- ICNTL(22): in-core/out-of-core factorization and solve (0 or 1)

Good luck. Hope you have a fast file system…