Hello,

I am having issues running mpiexec when I run on more than one node.

I am using v 1.4.1 because it is compatible with LAMMPS software I am using.

I am running on Windows Server 2012r2 and trying to get MPICH2 to play nice with Window's batch server.

I've installed mpich2 on each of the nodes and the head node.

1) msiexec /i mpich2-1.2.1-win-ia32.msi

2) mpiexec -register (to register username and password)

3) smpd -install (to start spmd server on each of the nodes and the head node)

4) On the head node, I've used smpd -sethosts hostname1 hostname2 ... to add each of the hosts. I haven't done this on the compute nodes.

When I execute a job through Windows batch system through PowerShell, my job executes but puts all of the executions on the same node. So if for example my nodes are 16 cores, and I ask for 32 cores, 32 separate processes are run on the first node and none on the second, even though Window's scheduler is allocated 2 nodes.

It's like mpiexec is ignoring the node list that the smpd hosts is setting.

I can use a machinefile with mpiexec and this will allow me to execute on multiple nodes but it doesn't seem to follow the nodes that Windows allocates in their batch server.

I should also add that when I try to request more than one node through Window's batch server with -requestednodes "host1 host2" with new-hpcjob, Windows tells me that I can't do this because I have zero cores available. I can ask for only 1 node and up to the maximum number of cores and it is ok with this.

Any suggestions?

Thank you.

Josh