Computing : mvapich

mvapich usually won't be in PATH or LD_LIBRARY_PATH. To initialize the environment use the module command:

[pal]$ module avail               # show available module; if module is undefined (bash) source /etc/profile.d/modules.sh 
[pal]$ module load mvapich-x86_64   # initialize environment
[pal]$ which mpicc
/usr/lib64/mvapich/bin/mpicc

mvapich is essentially derived from mpich, but highly tuned for infiniband interconnects. Though mvapich is installed on BIRD, it won't be possible to run across nodes. Being limited to single-host jobs, mpich would usually be the better choice. On the HPC-nodes, mvapich is however a very good choice in many (but not all) cases outperforming openmpi