ds_config.json

{
    "bf16": {
      "enabled": true
    },
    "zero_optimization": {
      "stage": 2,
      "offload_optimizer": {
        "device": "cpu",
        "pin_memory": true
      },
      "allgather_partitions": true,
      "allgather_bucket_size": 2e8,
      "overlap_comm": true,
      "reduce_scatter": true,
      "reduce_bucket_size": 2e8,
      "contiguous_gradients": true
    },
    "train_batch_size": "auto",
    "train_micro_batch_size_per_gpu": "auto",
    "gradient_accumulation_steps": "auto",
    "gradient_clipping": 1.0,
    "wall_clock_breakdown": false
  }