ReAugKD: Retrieval-Augmented Knowledge Distillation For Pre-trained Language Models
Jianyi Zhang, Aashiq Muhamed, Aditya Anantharaman, Guoyin Wang, Changyou Chen, Kai Zhong, Qingjun Cui, Yi Xu
Abstract
Knowledge Distillation (KD) is one of the most effective approaches to deploying large-scale pre-trained language models in low-latency environments by transferring the knowledge contained in the large-scale models to smaller student models. Prior KD approaches use the soft labels and intermediate activations generated by the teacher to transfer knowledge to the student model parameters alone. In this paper, we show that having access to non-parametric memory in the form of a knowledge base with the teacher’s soft labels and predictions can further improve student generalization. To enable the student to retrieve from the knowledge base effectively, we propose a new framework and loss function that preserves the semantic similarities of teacher and student training examples. We show through extensive experiments that our retrieval mechanism can achieve state-of-the-art performance for task-specific knowledge distillation on the GLUE benchmark.
BibTeX
@inproceedings{zhang-etal-2023-reaugkd,
title = "{R}e{A}ug{KD}: Retrieval-Augmented Knowledge Distillation For Pre-trained Language Models",
author = "Zhang, Jianyi and
Muhamed, Aashiq and
Anantharaman, Aditya and
Wang, Guoyin and
Chen, Changyou and
Zhong, Kai and
Cui, Qingjun and
Xu, Yi and
Zeng, Belinda and
Chilimbi, Trishul and
Chen, Yiran",
editor = "Rogers, Anna and
Boyd-Graber, Jordan and
Okazaki, Naoaki",
booktitle = "Proceedings of the 61st Annual Meeting of the Association for Computational Linguistics (Volume 2: Short Papers)",
month = jul,
year = "2023",
address = "Toronto, Canada",
publisher = "Association for Computational Linguistics",
url = "https://aclanthology.org/2023.acl-short.97/",
doi = "10.18653/v1/2023.acl-short.97",
pages = "1128--1136"
}