HP-MPI Version 1.2 for Windows Release Note

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Hello world! I'm 0 of 4 on n01

Hello world! I'm 2 of 4 on n02

1.8.8 Running with a Hostfile Using HPCS

Perform Steps 1 and 2 from “Building and Running on a Single Host” (page 25).

1. Change to a writable directory on a mapped drive. The mapped drive must be to a shared

folder for the cluster.

2. Create a file "hostfile" containing the list of nodes on which to run:

n01

n02

n03

n04

3. Submit the job to HPCS.

X:\demo> "%MPI_ROOT%\bin\mpirun" -ccp -hostlist hostfile -np 8

hello_world.exe

Nodes are allocated in the order that they appear in the hostfile. Nodes are scheduled

cyclically, so if you have requested more ranks than there are nodes in the hostfile, nodes

are used multiple times.

4. Analyze hello_world output.

HP-MPI prints the output from running the hello_world executable in non-deterministic

order. The following is an example of the output:

Hello world! I'm 5 of 8 on n02

Hello world! I'm 0 of 8 on n01

Hello world! I'm 2 of 8 on n03

Hello world! I'm 6 of 8 on n03

Hello world! I'm 1 of 8 on n02

Hello world! I'm 3 of 8 on n04

Hello world! I'm 4 of 8 on n01

Hello world! I'm 7 of 8 on n04

1.8.9 Running with a Hostlist Using HPCS

Perform Steps 1 and 2 from “Building and Running on a Single Host” (page 25).

1. Change to a writable directory on a mapped drive. The mapped drive should be to a shared

folder for the cluster.

2. Submit the job to HPCS, including the list of nodes on the command line.

X:\demo> "%MPI_ROOT%\bin\mpirun" -ccp -hostlist n01,n02,n03,n04 -np

8 hello_world.exe

Nodes are allocated in the order that they appear in the hostlist. Nodes are scheduled

cyclically, so if you have requested more ranks than there are nodes in the hostlist, nodes