# Parallel Processing
WINDOWS USERS: Instructions on Getting MPICH2 Running
The procedure below should work:
- Download MPICH2 binary
release from Argonne National Labs. You want the Win IA32 binary
(1.4.1p1) one.
- Uninstall previous version of MPICH
- Open an admin command prompt by right-clicking on the command prompt
icon and selecting "run as administrator
- Run "msiexec /i mpich2-1.3.2p1-win-ia32.msi" from the admin command
prompt to install MPICH2
- During installation select that MPICH2 be installed for "Everyone"
for all users.
- Run wmpiconfig and store username/password.
- Add "C:\Program Files\MPICH2\bin" to system Path and reboot
- Check smpd using 'smpd -status'. it should return 'smpd running on
$hostname$'
- To test execution environment, go to the directory
$MPICHROOT\examples and run cpi.exe using: 'mpiexec -n 4 cpi'
Sources: Pasted from <http://lists.mcs.anl.gov/pipermail/mpich-discuss/2010-February/006529.html>;
Pasted from <http://lists.mcs.anl.gov/pipermail/mpich-discuss/2011-January/008826.html>;
One last thing ... even on a 64-bit system, you will need the 32-bit
version as OpenSees is released is the 32 bit version.