This library provides a framework for parameter-efficient fine-tuning, enabling the adaptation of large pretrained models by training only a small subset of parameters. It functions as a distributed model training system and optimization toolkit, designed to reduce the computational and memory requirements typically associated with full model fine-tuning.
The project distinguishes itself through a suite of methods for modular adapter composition, including low-rank matrix decomposition and activation-based scaling. It supports the integration of multiple task-specific adapter modules, allowing users to merge, route, and combine these components into base model architectures. To ensure efficient inference, the library provides capabilities to integrate trained adapter weights directly into the original model.
The framework includes extensive support for memory-optimized training, utilizing techniques such as parameter offloading to system memory, low-bit quantization, and distributed parameter sharding across multiple hardware devices. These features allow for the training of massive models that exceed the memory capacity of individual graphics processing units. The library is distributed as a Python package and includes command-line tools for managing training tasks and authentication.
