Pearl: A Production-ready Reinforcement Learning Agent
Authors: Zheqing Zhu, Rodrigo de Salvo Braz, Jalaj Bhandari, Daniel Jiang, Yi Wan, Yonathan Efroni, Liyuan Wang, Ruiyang Xu, Hongbo Guo, Alex Nikulkov, Dmytro Korenkevych, Urun Dogan, Frank Cheng, Zheng Wu, Wanqiao Xu
AI-generated Key Points
- Introduction to Pearl, a production-ready RL agent software package
- Motivation behind Pearl's development
- Key features and design choices of Pearl
- Simple illustrations of Pearl's user interface
- Comparison of Pearl to other open-source RL libraries
- Initial benchmarking results of Pearl
- Current industry adoptions of Pearl to demonstrate its readiness for production usage
- Detailed description of the design of PearlAgent, including its five main modules: policy_learner, exploration_module, history_summarization_module, safety_module, and replay_buffer
- Introduction of notations that will be used throughout the paper to aid in understanding the modules
- Prioritization of key elements in the agent's design for efficient learning in practical sequential decision-making problems, including offline learning/pretraining, online learning with exploration capabilities, and safe learning with the ability to incorporate safety or preference constraints.
Abstract: Reinforcement Learning (RL) offers a versatile framework for achieving long-term goals. Its generality allows us to formalize a wide range of problems that real-world intelligent systems encounter, such as dealing with delayed rewards, handling partial observability, addressing the exploration and exploitation dilemma, utilizing offline data to improve online performance, and ensuring safety constraints are met. Despite considerable progress made by the RL research community in addressing these issues, existing open-source RL libraries tend to focus on a narrow portion of the RL solution pipeline, leaving other aspects largely unattended. This paper introduces Pearl, a Production-ready RL agent software package explicitly designed to embrace these challenges in a modular fashion. In addition to presenting preliminary benchmark results, this paper highlights Pearl's industry adoptions to demonstrate its readiness for production usage. Pearl is open sourced on Github at github.com/facebookresearch/pearl and its official website is located at pearlagent.github.io.
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