Configuration for Training

Base Model + Model Type + Tokenizer Type

Before we begin establishing the training run for a model, we provide below the range of configuration options for the Axolotl training platform.

Below are the primary categories for the YAML Training Configuration File

Category

Model Configuration

Data Loading and Processing

Sequence Configuration

Adapter Configuration

Logging and Monitoring

Training Configuration

Training Options

Attention Mechanisms

Training Schedules and Evaluation

Debugging and Optimization

Special Tokens

The expandable below provides an example YAML configuration scripts for using LoRA parameter efficient fine tuning for Meta's Llama2 model.

Reference: The full training script for Llama2

base_model: NousResearch/Llama-2-7b-hf
model_type: LlamaForCausalLM
tokenizer_type: LlamaTokenizer
is_llama_derived_model: true

load_in_8bit: true
load_in_4bit: false
strict: false

datasets:
  - path: mhenrichsen/alpaca_2k_test
    type: alpaca
dataset_prepared_path:
val_set_size: 0.05
output_dir: ./lora-out

sequence_len: 4096
sample_packing: true
pad_to_sequence_len: true

adapter: lora
lora_model_dir:
lora_r: 32
lora_alpha: 16
lora_dropout: 0.05
lora_target_linear: true
lora_fan_in_fan_out:

wandb_project:
wandb_entity:
wandb_watch:
wandb_name:
wandb_log_model:

gradient_accumulation_steps: 4
micro_batch_size: 2
num_epochs: 4
optimizer: adamw_bnb_8bit
lr_scheduler: cosine
learning_rate: 0.0002

train_on_inputs: false
group_by_length: false
bf16: true
fp16: false
tf32: false

gradient_checkpointing: true
early_stopping_patience:
resume_from_checkpoint:
local_rank:
logging_steps: 1
xformers_attention:
flash_attention: true

warmup_steps: 10
evals_per_epoch: 4
eval_table_size:
eval_table_max_new_tokens: 128
saves_per_epoch: 1
debug:
deepspeed:
weight_decay: 0.0
fsdp:
fsdp_config:
special_tokens:
  bos_token: "<s>"
  eos_token: "</s>"
  unk_token: "<unk>"

We will walk through establishing the configuration file for Phi 2.0.