This variant of EvoDiff has been slightly altered to be amenable to fine-tuning with or without LoRA.
Create a new conda environment with python v3.8.5.
conda create --name evodiff python=3.8.5
In that new environment, install EvoDiff:
pip install evodiff
Next, clone this repository and also a repository that provides a simple LoRA wrapper for the EvoDiff model. The wrapper will need to be installed as illustrated below.
git clone https://github.com/jlparkI/lora-pytorch-bnet-adapted
cd lora-pytorch-bnet-adapted
pip install .
cd ..
git clone https://github.com/jlparkI/evodiff_ft
To fine-tune EvoDiff, you'll create a shell script in the evodiff_ft
folder -- an example shell script is already included. This shell
script will supply some key arguments to the fine_tune.py file
and call it. Run this on GPU (on GPU-3 preferably). These arguments are:
--config_fpath The filepath to a config file. You can generally use the ones
under config. Under config there is one json file for the 38M parameter model
and one for the 640M parameter model -- use the one that's appropriate for
what you are trying to tune.
--out_fpath A filepath to a folder where the fine-tuned model and intermediate
results (checkpoints, loss on each epoch) will be saved.
--train_fpath A filepath to a file containing the sequences you would like to fine-tune
on. This file should have "Sequence" in the first line then all remaining lines are
sequences.
--valid_fpath A filepath to a file containing a validation set youy would like to score
after each epoch during training. This should have the same format as the training file.
--checkpoint_freq How many minutes to save a checkpoint at.
--large_model Supply this if you want to use the 640M parameter model; otherwise do not supply
this and the 38M parameter model will be used.
--LoRA Supply an integer to indicate the rank for LoRA. If you do not supply this argument LoRA
will not be used and the full model will be fine-tuned.
After fine-tuning, the state dict for the updated model will be saved to your output path, where you can load
it for further use, under the name "FINAL_MODEL.pt".
If you want to change the learning rate, number of epochs etc that will be used during fine- tuning, change the appropriate config file under config. Note that batch size is fairly important -- if you set this too high you may encounter an out of memory error. Using larger batches however can definitely speed up fine-tuning.
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