mpiBench-Infiniband-OpenMPI

mpiBench-Infiniband-OpenMPI

This recipe shows how to run the mpiBench benchmark on Linux using Open MPI and Infiniband over Azure VM instances in an Azure Batch compute pool. Execution of this distributed workload requires the use of multi-instance tasks.

Configuration

Please see refer to the set of sample configuration files for this recipe.

Pool Configuration

The pool configuration should enable the following properties:

• inter_node_communication_enabled must be set to true
• max_tasks_per_node must be set to 1 or omitted
• vm_configuration must be defined
  • platform_image must be defined
    • publisher must be set to OpenLogic
    • offer must be set to CentOS-HPC
    • sku must be set to 7.6
• vm_size must be set to an SR-IOV RDMA compatible VM size such as STANDARD_HB60rs or STANDARD_HC44rs

Global Configuration

The global configuration should set the following properties:

• docker_images array must have a reference to a valid mpiBench image that can be run with Open MPI. This can be vincentlabo/mpibench:openmpi-ib which is published on Docker Hub.

Jobs Configuration

The jobs configuration should set the following properties within the tasks array which should have a task definition containing:

• docker_image should be the name of the Docker image for this container invocation. For this example, this should be vincentlabo/mpibench:openmpi-ib.
• command should contain the command to pass to the mpirun invocation. For this example, we will run mpiBench with an ending message size of 1kB. The application command to run would be: /mpiBench/mpiBench -e 1K
• multi_instance property must be defined
  • num_instances should be set to pool_specification_vm_count_dedicated, pool_specification_vm_count_low_priority, pool_current_dedicated, or pool_current_low_priority
  • coordination_command should be unset or null. For pools with native container support, this command should be supplied if a non-standard sshd is required.
  • resource_files should be unset or the array can be empty
  • mpi property must be defined
    • runtime should be set to openmpi
    • processes_per_node should be set to nproc

Supplementary files

The Dockerfile for the Docker image can be found here. The Singularity Definition file for the Singularity image can be found here.