README.md

---
base_model:
- meta-llama/Llama-2-7b-hf
library_name: peft
license: apache-2.0
datasets:
- wikimedia/wikipedia
language:
- ja
- en
---

# Model Info

This is a model that applies LLM2Vec to Llama-2. Only the PEFT Adapter is distributed.
LLM2Vec is fine-tuned on two tasks: MNTP and SimCSE, and this repository contains the results of applying SimCSE after MNTP. 
For the MNTP Adapter, please refer to [this link](https://huggingface.co/uzabase/LLM2Vec-Llama-2-7b-hf-wikipedia-jp-mntp).

## Model Details

### Model Description

<!-- Provide a longer summary of what this model is. -->

- **Model type:** PEFT
- **Language(s) (NLP):** Japanese
- **License:** Apache2.0
- **Finetuned from model:** [Llama-2-7b-hf](https://huggingface.co/meta-llama/Llama-2-7b-hf)

### Model Sources [optional]

- **Repository:**  https://github.com/McGill-NLP/llm2vec
- **Paper:** https://arxiv.org/abs/2404.05961

# Usage

- Please see [original LLM2Vec repo](https://huggingface.co/McGill-NLP/LLM2Vec-Llama-2-7b-chat-hf-mntp-unsup-simcse#usage)

# BenchMark
- Followings are summaries. Details are [here](https://tech.uzabase.com/entry/2024/09/30/114245)
## MTEB(Japansese)

| | Classification | Clustering | PairClassification | Reranking | BitextMining | Retrieval | STS | AVG |
| --- | ---: | ---: | ---: | ---: | ---: |  ---: | ---: | ---: |
| Llama2-Llm2vec-eng | 0.527 | 0.258 | 0.501 | 0.217 | 0.275 | 0.296 | 0.765 | 0.408 |
| **Llama2-Llm2vec-jpn (This repo)** | 0.570 | 0.365 | 0.510 | 0.349 | 0.470 | 0.417 | 0.795 | 0.498 |
| Swallow-Llm2vec-jpn | 0.621 | 0.391 | 0.510 | 0.475 | 0.475 | 0.491 | 0.832 | 0.523 |

## MTEB(English)

| |	Classification | Clustering | Pair_Classification| Reranking | Retrieval | STS | 平均 |
| --- | ---: | ---: | ---: | ---: | ---: | ---: | ---: |
| Llama2-Llm2vec-eng | 0.709 | 0.386 |	0.780 |	0.588 | 0.329| 0.723 | 0.586 |
| **Llama2-Llm2vec-jpn (This repo)** | 0.722 | 0.428 |	0.785 |	0.594 |	0.371 | 0.717 | 0.603 |
| Swallow-Llm2vec-jpn |	0.695 |	0.385 |	0.751 |	0.576 |	0.318 | 0.710 | 0.572 |


# Training Details

## Training Data

- Make Corpus from SimCSE from [Wikipedia](https://huggingface.co/datasets/wikimedia/wikipedia)
- Script for making SimCSE Corpus
```
import argparse
import random
import re
from pathlib import Path
from datasets import load_dataset
from tqdm import tqdm

def main(args):
    random.seed(args.seed)
    wiki_ds = load_dataset("wikimedia/wikipedia", "20231101.ja")
    sampled_index = random.sample(range(len(wiki_ds["train"])), args.N)
    sample_wiki = wiki_ds["train"][sampled_index]
    output_texts = []
    for title, text in tqdm(zip(sample_wiki["title"], sample_wiki["text"])):
        output_texts.append(title)
        sentences = re.split("[\n。]", text)
        for sentence in sentences:
            if len(sentence) > args.min_sentence_len: 
                output_texts.append(sentence.strip()+"。")
    with args.output_path.open(mode="w") as f:
        for line in output_texts:
            f.write(line)
            f.write("\n")


if __name__ == "__main__":
    parser = argparse.ArgumentParser()
    parser.add_argument("--N", default=200000, type=int)
    parser.add_argument("--seed", default=42, type=int)
    parser.add_argument("-o", "--output_path", type=Path)
    parser.add_argument("--min_sentence_len", default=50, type=int)

    args = parser.parse_args()
    main(args)
```
  


## Training Hyperparameter
- simcse_dropout: 0.3
- bidirectional: true
- pooling_mode: "mean"
- remove_unused_columns: false
- learning_rate: 3e-5
- loss_scale: 20
- batch_size: 256
- gradient_accumulation_steps: 1
- max_seq_length: 128
- lora_r: 16
- torch_dtype: "bfloat16"
- attn_implementation: "flash_attention_2"
- seed: 42
- bf16: true
- gradient_checkpointing: true
    

## Accelerator Settings
- deepspeed_config:
  - gradient_accumulation_steps: 1
  - gradient_clipping: 1.0
  - offload_optimizer_device: nvme
  - offload_optimizer_nvme_path: /nvme
  - zero3_save_16bit_model: true
  - zero_stage: 2 
- distributed_type: DEEPSPEED
- downcast_bf16: 'no'
- dynamo_config:
  - dynamo_backend: INDUCTOR
  - dynamo_mode: default
  - dynamo_use_dynamic: true
  - dynamo_use_fullgraph: true
- enable_cpu_affinity: false
- machine_rank: 0
- main_training_function: main
- mixed_precision: bf16
- num_machines: 1
- num_processes: 2
- rdzv_backend: static
- same_network: true
- quse_cpu: false


## Framework versions

- Python: 3.12.3
- PEFT 0.11.1
- Sentence Transformers: 3.0.1
- Transformers: 4.41.0
- PyTorch: 2.3.0
- Accelerate: 0.30.1
- Datasets: 2.20.0
- Tokenizers: 0.19.1
- MTEB: 1.13.0