---
language:
- en
tags:
- summarization
datasets:
- ccdv/mediasum
metrics:
- rouge
model-index:
- name: ccdv/lsg-bart-base-4096-mediasum
  results: []
---

<!-- This model card has been generated automatically according to the information the Trainer had access to. You
should probably proofread and complete it, then remove this comment. -->

**Transformers >= 4.36.1**\
**This model relies on a custom modeling file, you need to add trust_remote_code=True**\
**See [\#13467](https://github.com/huggingface/transformers/pull/13467)**

LSG ArXiv [paper](https://arxiv.org/abs/2210.15497). \
Github/conversion script is available at this [link](https://github.com/ccdv-ai/convert_checkpoint_to_lsg).

```python
from transformers import AutoTokenizer, AutoModelForSeq2SeqLM, pipeline

tokenizer = AutoTokenizer.from_pretrained("ccdv/lsg-bart-base-4096-mediasum", trust_remote_code=True)
model = AutoModelForSeq2SeqLM.from_pretrained("ccdv/lsg-bart-base-4096-mediasum", trust_remote_code=True)

text = "Replace by what you want."
pipe = pipeline("text2text-generation", model=model, tokenizer=tokenizer, device=0)
generated_text = pipe(
  text, 
  truncation=True, 
  max_length=64, 
  no_repeat_ngram_size=7,
  num_beams=2,
  early_stopping=True
  )
```

# ccdv/lsg-bart-base-4096-mediasum

This model is a fine-tuned version of [ccdv/lsg-bart-base-4096](https://huggingface.co/ccdv/lsg-bart-base-4096) on the [ccdv/mediasum roberta_prepended](https://huggingface.co/datasets/ccdv/mediasum) dataset. \
It achieves the following results on the test set:

| Length | Sparse Type  | Block Size | Sparsity | Connexions | R1    | R2    | RL    | RLsum |
|:------ |:------------ |:---------- |:-------- | :--------- |:----- |:----- |:----- |:----- |
| 4096   | Local        | 256        | 0        | 768        | 35.16 | 18.13 | 31.54 | 32.20 |
| 4096   | Local        | 128        | 0        | 384        | 34.16 | 17.61 | 30.75 | 31.41 |
| 4096   | Pooling      | 128        | 4        | 644        | 34.52 | 17.71 | 31.01 | 31.67 |
| 4096   | Stride       | 128        | 4        | 644        | 35.05 | 18.11 | 31.47 | 32.13 |
| 4096   | Block Stride | 128        | 4        | 644        | 34.72 | 17.81 | 31.13 | 31.82 |
| 4096   | Norm         | 128        | 4        | 644        | 34.75 | 17.86 | 31.10 | 31.77 |
| 4096   | LSH          | 128        | 4        | 644        | 34.54 | 17.81 | 31.05 | 31.71 |

With smaller block size (lower ressources):

| Length | Sparse Type  | Block Size | Sparsity | Connexions | R1    | R2    | RL    | RLsum |
|:------ |:------------ |:---------- |:-------- | :--------- |:----- |:----- |:----- |:----- |
| 4096   | Local        | 64         | 0        | 192        | 32.55 | 16.66 | 29.36 | 30.00 |
| 4096   | Local        | 32         | 0        | 96         | 30.98 | 15.41 | 27.84 | 28.46 |
| 4096   | Pooling      | 32         | 4        | 160        | 31.84 | 16.02 | 28.68 | 29.30 |
| 4096   | Stride       | 32         | 4        | 160        | 32.67 | 16.68 | 29.47 | 30.10 |
| 4096   | Block Stride | 32         | 4        | 160        | 32.51 | 16.64 | 29.33 | 29.94 |
| 4096   | Norm         | 32         | 4        | 160        | 32.44 | 16.48 | 29.20 | 29.79 |
| 4096   | LSH          | 32         | 4        | 160        | 31.79 | 16.04 | 28.67 | 29.31 |

## Model description
The model relies on Local-Sparse-Global attention to handle long sequences:
![attn](attn.png)

The model has about ~145 millions parameters (6 encoder layers - 6 decoder layers). \
The model is warm started from BART-base, converted to handle long sequences (encoder only) and fine tuned.

## Intended uses & limitations

More information needed

## Training and evaluation data

More information needed

## Training procedure

### Training hyperparameters

The following hyperparameters were used during training:
- learning_rate: 8e-05
- train_batch_size: 8
- seed: 42
- gradient_accumulation_steps: 4
- total_train_batch_size: 32
- optimizer: Adam with betas=(0.9,0.999) and epsilon=1e-08
- lr_scheduler_type: linear
- lr_scheduler_warmup_ratio: 0.1
- num_epochs: 6.0

### Generate hyperparameters

The following hyperparameters were used during generation:
- dataset_name: ccdv/mediasum
- dataset_config_name: roberta_prepended
- eval_batch_size: 8
- eval_samples: 10000
- early_stopping: True
- ignore_pad_token_for_loss: True
- length_penalty: 2.0
- max_length: 128
- min_length: 3
- num_beams: 5
- no_repeat_ngram_size: None
- seed: 123

### Framework versions

- Transformers 4.18.0
- Pytorch 1.10.1+cu102
- Datasets 2.1.0
- Tokenizers 0.11.6