In order to run parallel MPI applications on a Windows Azure Compute Cluster Service, we must open the firewall for communication between the compute nodes. These steps must be repeated for any application that communicates across nodes.
Open a Remote Desktop Connection to the compute cluster service’s head node role instance.
- Use the Remote Desktop Connection to open a Command Prompt window on the cluster head node.
Type the following command to open the firewall on all compute nodes. Replace application_name with the name of your application (e.g. pop.exe) and application_path with the path to your application (e.g.^%ccp_package_root^%pop\pop.exe):
clusrun /nodegroup:computenode hpcfwutil register application_name application_path
Remember your escape characters
The caret ‘^’ escapes the percent ‘%’ character and prevents %ccp_package_root% from being evaluated on the head node.
- If you are prompted for a password, enter your administrator password and enter Y to remember the password.
- Wait for the command to finish. All compute nodes should return 0 to indicate success:
The work was supported by the Microsoft Developer and Platform Evangelism Team.