Training SANA Sprint Diffuser

This README explains how to use the provided bash script commands to download a pre-trained teacher diffuser model and train it on a specific dataset, following the SANA Sprint methodology.

Setup

1. Define the local paths

Set a variable for your desired output directory. This directory will store the downloaded model and the training checkpoints/results.

your_local_path='output' # Or any other path you prefer
mkdir -p $your_local_path # Create the directory if it doesn't exist

2. Download the pre-trained model

Download the SANA Sprint teacher model from Hugging Face Hub. The script uses the 1.6B parameter model.

hf download Efficient-Large-Model/SANA_Sprint_1.6B_1024px_teacher_diffusers --local-dir $your_local_path/SANA_Sprint_1.6B_1024px_teacher_diffusers

(Optional: You can also download the 0.6B model by replacing the model name: Efficient-Large-Model/Sana_Sprint_0.6B_1024px_teacher_diffusers)

3. Acquire the dataset shards

The training script in this example uses specific .parquet shards from a randomly selected brivangl/midjourney-v6-llava dataset instead of downloading the entire dataset automatically via dataset_name.

The script specifically uses these three files:

• data/train_000.parquet
• data/train_001.parquet
• data/train_002.parquet

You can either:

Let the script download the dataset automatically during first run

Or download it manually

Note: The full brivangl/midjourney-v6-llava dataset is much larger and contains many more shards. This script example explicitly trains only on the three specified shards.

Usage

Once the model is downloaded, you can run the training script.

your_local_path='output' # Ensure this variable is set

python train_sana_sprint_diffusers.py \
    --pretrained_model_name_or_path=$your_local_path/SANA_Sprint_1.6B_1024px_teacher_diffusers \
    --output_dir=$your_local_path \
    --mixed_precision=bf16 \
    --resolution=1024 \
    --learning_rate=1e-6 \
    --max_train_steps=30000 \
    --dataloader_num_workers=8 \
    --dataset_name='brivangl/midjourney-v6-llava' \
    --file_path data/train_000.parquet data/train_001.parquet data/train_002.parquet \
    --checkpointing_steps=500 --checkpoints_total_limit=10 \
    --train_batch_size=1 \
    --gradient_accumulation_steps=1 \
    --seed=453645634 \
    --train_largest_timestep \
    --misaligned_pairs_D \
    --gradient_checkpointing \
    --resume_from_checkpoint="latest" \

Explanation of parameters

• --pretrained_model_name_or_path: Path to the downloaded pre-trained model directory.
• --output_dir: Directory where training logs, checkpoints, and the final model will be saved.
• --mixed_precision: Use BF16 mixed precision for training, which can save memory and speed up training on compatible hardware.
• --resolution: The image resolution used for training (1024x1024).
• --learning_rate: The learning rate for the optimizer.
• --max_train_steps: The total number of training steps to perform.
• --dataloader_num_workers: Number of worker processes for loading data. Increase for faster data loading if your CPU and disk can handle it.
• --dataset_name: The name of the dataset on Hugging Face Hub (brivangl/midjourney-v6-llava).
• --file_path: Specifies the local paths to the dataset shards to be used for training. In this case, data/train_000.parquet, data/train_001.parquet, and data/train_002.parquet.
• --checkpointing_steps: Save a training checkpoint every X steps.
• --checkpoints_total_limit: Maximum number of checkpoints to keep. Older checkpoints will be deleted.
• --train_batch_size: The batch size per GPU.
• --gradient_accumulation_steps: Number of steps to accumulate gradients before performing an optimizer step.
• --seed: Random seed for reproducibility.
• --train_largest_timestep: A specific training strategy focusing on larger timesteps.
• --misaligned_pairs_D: Another specific training strategy to add misaligned image-text pairs as fake data for GAN.
• --gradient_checkpointing: Enable gradient checkpointing to save GPU memory.
• --resume_from_checkpoint: Allows resuming training from the latest saved checkpoint in the --output_dir.