Reference: Multi-node parallel job - Amazon Batch
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Reference: Multi-node parallel job

The following example job definition illustrates a multi-node parallel job. For more information, see Building a tightly coupled molecular dynamics workflow with multi-node parallel jobs in Amazon Batch in the Amazon Compute blog.

{
  "jobDefinitionName": "gromacs-jobdef",
  "jobDefinitionArn": "arn:aws-cn:batch:us-east-2:123456789012:job-definition/gromacs-jobdef:1",
  "revision": 6,
  "status": "ACTIVE",
  "type": "multinode",
  "parameters": {},
  "nodeProperties": {
    "numNodes": 2,
    "mainNode": 0,
    "nodeRangeProperties": [
      {
        "targetNodes": "0:1",
        "container": {
          "image": "123456789012.dkr.ecr.us-east-2.amazonaws.com/gromacs_mpi:latest",
          "resourceRequirements": [
              {
                  "type": "MEMORY",
                  "value": "24000"
              },
              {
                  "type": "VCPU",
                  "value": "8"
              }
          ],
          "command": [],
          "jobRoleArn": "arn:aws-cn:iam::123456789012:role/ecsTaskExecutionRole",
          "ulimits": [],
          "instanceType": "p3.2xlarge"
        }
      }
    ]
  }
}