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Datasets and Evaluation Metrics

The provided fine tuning script allows you to select between three datasets by passing the dataset arg to the llama_recipes.finetuning module or examples/finetuning.py script. The current options are grammar_dataset, alpaca_datasetand samsum_dataset. Note: Use of any of the datasets should be in compliance with the dataset's underlying licenses (including but not limited to non-commercial uses)

  • grammar_dataset contains 150K pairs of english sentences and possible corrections.
  • alpaca_dataset provides 52K instruction-response pairs as generated by text-davinci-003.
  • samsum_dataset contains about 16k messenger-like conversations with summaries.

Using custom datasets

The list of available datasets in llama-recipes is supposed to give users a quick start on training their Llama model. To use a custom dataset there are two possible ways. The first provides a function returning the dataset in a .py file which can be given to the command line tool. This does not involve changing the source code of llama-recipes. The second way is targeting contributions which extend llama-recipes as it involves changing the source code.

Training on custom data

To supply a custom dataset you need to provide a single .py file which contains a function with the following signature:

def get_custom_dataset(dataset_config, tokenizer, split: str):

For an example get_custom_dataset you can look at the provided datasets in llama_recipes.datasets or examples/custom_dataset.py. The dataset_config in the above signature will be an instance of llama_recipes.configs.dataset.custom_dataset with the modifications made through the command line. The split signals wether to return the training or validation dataset. The default function name is get_custom_dataset but this can be changes as described below.

In order to start a training with the custom dataset we need to set the --dataset as well as the --custom_dataset.file parameter.

python -m llama_recipes.finetuning --dataset "custom_dataset" --custom_dataset.file "examples/custom_dataset.py" [TRAINING PARAMETERS]

To change the function name that is used in the .py you can append the name following a : like this:

python -m llama_recipes.finetuning --dataset "custom_dataset" --custom_dataset.file "examples/custom_dataset.py:get_foo" [TRAINING PARAMETERS]

This will call the function get_foo instead of get_custom_dataset when retrieving the dataset.

Adding new dataset

Each dataset has a corresponding configuration (dataclass) in configs/datasets.py which contains the dataset name, training/validation split names, as well as optional parameters like datafiles etc.

Additionally, there is a preprocessing function for each dataset in the datasets folder. The returned data of the dataset needs to be consumable by the forward method of the fine-tuned model by calling model(**data). For CausalLM models this usually means that the data needs to be in the form of a dictionary with "input_ids", "attention_mask" and "labels" fields.

To add a custom dataset the following steps need to be performed.

  1. Create a dataset configuration after the schema described above. Examples can be found in configs/datasets.py.
  2. Create a preprocessing routine which loads the data and returns a PyTorch style dataset. The signature for the preprocessing function needs to be (dataset_config, tokenizer, split_name) where split_name will be the string for train/validation split as defined in the dataclass.
  3. Register the dataset name and preprocessing function by inserting it as key and value into the DATASET_PREPROC dictionary in utils/dataset_utils.py
  4. Set dataset field in training config to dataset name or use --dataset option of the llama_recipes.finetuning module or examples/finetuning.py training script.

Application

Below we list other datasets and their main use cases that can be used for fine tuning.

Q&A these can be used for evaluation as well

instruction finetuning

  • Alpaca 52k instruction tuning
  • Dolly 15k 15k instruction tuning

simple text generation for quick tests

English quotes 2508 Multi-label text classification, text generation

Reasoning used mostly for evaluation of LLMs

Toxicity evaluation

Bias evaluation

Useful Links

More information on evaluation dataset can be found in HELM