ds_config_zero3.json

{
    "fp16": {
        "enabled": true,
        "loss_scale": 0,
        "loss_scale_window": 500,
        "initial_scale_power": 16,
        "hysteresis": 2,
        "min_loss_scale": 1
    },

    "optimizer": {
        "type": "AdamW",
        "params": {
            "lr": "auto",
            "betas": "auto",
            "eps": 1e-8,
            "weight_decay": "auto"
        }
    },

    "scheduler": {
        "type": "WarmupLR",
        "params": {
            "warmup_min_lr": 0,
            "warmup_max_lr": 2e-05,
            "warmup_num_steps": 0
        }
    },

    "zero_optimization": {
        "stage": 2,
        "offload_optimizer": {
            "device": "cpu",
            "pin_memory": false
        },
        "allgather_partitions": true,
        "allgather_bucket_size": 2e8,
        "overlap_comm": true,
        "reduce_scatter": true,
        "reduce_bucket_size": 2e8,
        "contiguous_gradients": true
    },

    "gradient_accumulation_steps":2,
    "gradient_clipping": "auto",
    "steps_per_print": 2000,
    "train_batch_size": 4,
    "train_micro_batch_size_per_gpu": 1,
    "wall_clock_breakdown": false
}