When I checkpoint LAM MPI jobs, all the checkpoints wind up in my $HOME directory. Can I use a different directory?
By default, LAM/MPI will use $HOME as the location for storing the checkpoint files for all the processes involved in an MPI job, unless it was configured at build time with ‘configure –with-cr-file-dir=/somewhere/else’, in which case ‘/somewhere/else’ will be the default location. So rebuilding LAM is one (rather slow and painful) way to change where checkpoints are stored. A much easier solution is to set the LAM ‘cr_base_dir’ SSI parameter for each individual job that you wish to have use a different directory for storing checkpoints. This can either be done by setting the ‘$LAM_MPI_SSI_cr_base_dir’ environment variable to the full path of the directory you want to use, or by setting the ‘cr_base_dir’ parameter on the command line: $ mpirun -np 2 -ssi cr_base_dir /somewhere/else a.out See the LAM Documentation for more details, especially the “Available MPI Modules | Checkpoint/Restart of MPI Jobs” section in the User’s Guide.
