scripts/deepspeed/ds_config_zero2_no_optimizer.json

{
    "fp16": {
        "enabled": "auto",
        "loss_scale": 0,
        "loss_scale_window": 1000,
        "initial_scale_power": 16,
        "hysteresis": 2,
        "min_loss_scale": 1
    },
    "bf16": {
        "enabled": "auto"
    },

    "scheduler": {
        "type": "WarmupCosineLR",
        "params": {
            "total_num_steps": "auto",
            "warmup_min_ratio": 0,
            "warmup_num_steps": "auto",
            "cos_min_ratio": 0.1
        }
    },

    "zero_optimization": {
        "stage": 2,
        "offload_optimizer": {
            "device": "none",
            "pin_memory": true
        },
        "offload_param": {
            "device": "none",
            "pin_memory": true
        },
        "allgather_partitions": true,
        "allgather_bucket_size": 5e8,
        "overlap_comm": true,
        "reduce_scatter": true,
        "reduce_bucket_size": 5e8,
        "contiguous_gradients": true,
        "round_robin_gradients": true,
        "sub_group_size": 1e12
    },

    "gradient_accumulation_steps": "auto",
    "gradient_clipping": "auto",
    "steps_per_print": 100,
    "train_batch_size": "auto",
    "train_micro_batch_size_per_gpu": "auto",
    "wall_clock_breakdown": false,
    "dump_state": false

}