ds_config_stage3.json

{
  "train_batch_size": 2,
  "steps_per_print": 2000,

  "fp16": {
    "enabled": true,
    "loss_scale": 0,
    "loss_scale_window": 1000,
    "initial_scale_power": 12,
    "hysteresis": 2,
    "min_loss_scale": 1
  },

  "zero_optimization": {
    "stage": 3,
    "cpu_offload": true,
    "cpu_offload_params": true,
    "overlap_comm": true,
    "contiguous_gradients": true,
    "stage3_max_live_parameters": 6000000,
    "stage3_max_reuse_distance": 100000000,
    "stage3_prefetch_bucket_size": 200000,
    "stage3_param_persitance_threshold": 100000,
    "reduce_bucket_size": 3000000,
    "sub_group_size": 1e6,
    "stage3_gather_fp16_weights_on_model_save": true
  },

  "optimizer": {
    "type": "Adam",
    "params": {
      "lr": 1e-5,
      "betas": [
        0.8,
        0.999
      ],
      "eps": 1e-8,
      "weight_decay": 3e-7
    }
  },
  "scheduler": {
    "type": "WarmupLR",
    "params": {
      "warmup_min_lr": 0,
      "warmup_max_lr": 3e-5,
      "warmup_num_steps": 500
    }
  },
  "wall_clock_breakdown": false
}