Run distributed training on a heterogeneous cluster in Amazon SageMaker AI - Amazon SageMaker AI

Run distributed training on a heterogeneous cluster in Amazon SageMaker AI

Through the distribution argument of the SageMaker AI estimator class, you can assign a specific instance group to run distributed training. For example, assume that you have the following two instance groups and want to run multi-GPU training on one of them. 

from sagemaker.instance_group import InstanceGroup

instance_group_1 = InstanceGroup("instance_group_1", "ml.c5.18xlarge", 1)
instance_group_2 = InstanceGroup("instance_group_2", "ml.p3dn.24xlarge", 2)

You can set the distributed training configuration for one of the instance groups. For example, the following code examples show how to assign training_group_2 with two ml.p3dn.24xlarge instances to the distributed training configuration.

Note

Currently, only one instance group of a heterogeneous cluster can be specified to the distribution configuration.

With MPI

PyTorch
from sagemaker.pytorch import PyTorch

estimator = PyTorch(
    ...
    instance_groups=[instance_group_1, instance_group_2],
    distribution={
        "mpi": {
            "enabled": True, "processes_per_host": 8
        },
        "instance_groups": [instance_group_2]
    }
)
TensorFlow
from sagemaker.tensorflow import TensorFlow

estimator = TensorFlow(
    ...
    instance_groups=[instance_group_1, instance_group_2],
    distribution={
        "mpi": {
            "enabled": True, "processes_per_host": 8
        },
        "instance_groups": [instance_group_2]
    }
)

With the SageMaker AI data parallel library

PyTorch
from sagemaker.pytorch import PyTorch

estimator = PyTorch(
    ...
    instance_groups=[instance_group_1, instance_group_2],
    distribution={
        "smdistributed": {
            "dataparallel": {
                "enabled": True
            }
        }, 
        "instance_groups": [instance_group_2]
    }
)
TensorFlow
from sagemaker.tensorflow import TensorFlow

estimator = TensorFlow(
    ...
    instance_groups=[instance_group_1, instance_group_2],
    distribution={
        "smdistributed": {
            "dataparallel": {
                "enabled": True
            }
        }, 
        "instance_groups": [instance_group_2]
    }
)
Note

When using the SageMaker AI data parallel library, make sure the instance group consists of the supported instance types by the library.

For more information about the SageMaker AI data parallel library, see SageMaker AI Data Parallel Training.

With the SageMaker AI model parallel library

PyTorch
from sagemaker.pytorch import PyTorch

estimator = PyTorch(
    ...
    instance_groups=[instance_group_1, instance_group_2],
    distribution={
        "smdistributed": {
            "modelparallel": {
                "enabled":True,
                "parameters": {
                    ...   # SageMaker AI model parallel parameters
                } 
            }
        }, 
        "instance_groups": [instance_group_2]
    }
)
TensorFlow
from sagemaker.tensorflow import TensorFlow

estimator = TensorFlow(
    ...
    instance_groups=[instance_group_1, instance_group_2],
    distribution={
        "smdistributed": {
            "modelparallel": {
                "enabled":True,
                "parameters": {
                    ...   # SageMaker AI model parallel parameters
                } 
            }
        }, 
        "instance_groups": [instance_group_2]
    }
)

For more information about the SageMaker AI model parallel library, see SageMaker AI Model Parallel Training.