RRADistill: Distilling LLMs' Passage Ranking Ability for Long-Tail Queries Document Re-Ranking on a Search Engine

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Main Authors: Choi, Nayoung, Lee, Youngjune, Cho, Gyu-Hwung, Jeong, Haeyu, Kong, Jungmin, Kim, Saehun, Park, Keunchan, Cho, Sarah, Jeong, Inchang, Nam, Gyohee, Han, Sunghoon, Yang, Wonil, Choi, Jaeho
Format: Preprint
Published: 2024
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author Choi, Nayoung
Lee, Youngjune
Cho, Gyu-Hwung
Jeong, Haeyu
Kong, Jungmin
Kim, Saehun
Park, Keunchan
Cho, Sarah
Jeong, Inchang
Nam, Gyohee
Han, Sunghoon
Yang, Wonil
Choi, Jaeho
author_facet Choi, Nayoung
Lee, Youngjune
Cho, Gyu-Hwung
Jeong, Haeyu
Kong, Jungmin
Kim, Saehun
Park, Keunchan
Cho, Sarah
Jeong, Inchang
Nam, Gyohee
Han, Sunghoon
Yang, Wonil
Choi, Jaeho
contents Large Language Models (LLMs) excel at understanding the semantic relationships between queries and documents, even with lengthy and complex long-tail queries. These queries are challenging for feedback-based rankings due to sparse user engagement and limited feedback, making LLMs' ranking ability highly valuable. However, the large size and slow inference of LLMs necessitate the development of smaller, more efficient models (sLLMs). Recently, integrating ranking label generation into distillation techniques has become crucial, but existing methods underutilize LLMs' capabilities and are cumbersome. Our research, RRADistill: Re-Ranking Ability Distillation, propose an efficient label generation pipeline and novel sLLM training methods for both encoder and decoder models. We introduce an encoder-based method using a Term Control Layer to capture term matching signals and a decoder-based model with a ranking layer for enhanced understanding. A/B testing on a Korean-based search platform, validates the effectiveness of our approach in improving re-ranking for long-tail queries.
format Preprint
id arxiv_https___arxiv_org_abs_2410_18097
institution arXiv
publishDate 2024
record_format arxiv
spellingShingle RRADistill: Distilling LLMs' Passage Ranking Ability for Long-Tail Queries Document Re-Ranking on a Search Engine
Choi, Nayoung
Lee, Youngjune
Cho, Gyu-Hwung
Jeong, Haeyu
Kong, Jungmin
Kim, Saehun
Park, Keunchan
Cho, Sarah
Jeong, Inchang
Nam, Gyohee
Han, Sunghoon
Yang, Wonil
Choi, Jaeho
Information Retrieval
Artificial Intelligence
Machine Learning
Large Language Models (LLMs) excel at understanding the semantic relationships between queries and documents, even with lengthy and complex long-tail queries. These queries are challenging for feedback-based rankings due to sparse user engagement and limited feedback, making LLMs' ranking ability highly valuable. However, the large size and slow inference of LLMs necessitate the development of smaller, more efficient models (sLLMs). Recently, integrating ranking label generation into distillation techniques has become crucial, but existing methods underutilize LLMs' capabilities and are cumbersome. Our research, RRADistill: Re-Ranking Ability Distillation, propose an efficient label generation pipeline and novel sLLM training methods for both encoder and decoder models. We introduce an encoder-based method using a Term Control Layer to capture term matching signals and a decoder-based model with a ranking layer for enhanced understanding. A/B testing on a Korean-based search platform, validates the effectiveness of our approach in improving re-ranking for long-tail queries.
title RRADistill: Distilling LLMs' Passage Ranking Ability for Long-Tail Queries Document Re-Ranking on a Search Engine
topic Information Retrieval
Artificial Intelligence
Machine Learning
url https://arxiv.org/abs/2410.18097