ds_config.json

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

   "zero_optimization": {
       "stage": 2,
       "allgather_partitions": true,
       "allgather_bucket_size": 2e8,
       "overlap_comm": true,
       "reduce_scatter": true,
       "reduce_bucket_size": 2e8,
       "contiguous_gradients": true,
       "cpu_offload": true
   },

   "zero_allow_untested_optimizer": true,

   "optimizer": {
     "type": "AdamW",
     "params": {
       "lr": 3e-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
     }
   },

    "steps_per_print": 2000,
    "wall_clock_breakdown": false
}