LLaMA-Factory LoRA微调 Qwen2.5-1.5B Instruct版本

(如果是已经看过前面文章的朋友可以直接跳过前段部分即可)

Hello,我是小S,前两篇文章讲了“力大砖飞”的全参微调,那么这篇封笔之作,自然会讲到性价比超高,并且十分优雅的LoRA微调了!

看过前两篇的朋友都知道,我一向是对全参微调十分慷慨,每次都给他上6张4090……虽然用着十分爽,可是就和开油车一样,虽然心灵是满足的,但是钱包是在哭泣的。

虽然全参微调可以让胡言乱语的Base模型开始说人话,也可以让Instruct模型更出色。

但是人有“三高”,大模型也有“三高”:高成本、长时间、大存储。属于是赛博三高了,那么赛博三高就有请赛博医生来治——LoRA微调登场!

LoRA的全称是Low-Rank Adaptation,一看名字就感觉性价比超高的,很“Low”

所以今天,我要做出一个违背祖宗的决定,只用1张4090,搞定LoRA微调!(也是开上了高性价比的电车了)

那么事不宜迟,开始今天的LoRA微调之旅,当最后对比的时候,我会综合对比一下训练出来的结果,并且分享一些我自己的理解给大家。

准备工作

开始当然还是到我们公司的云平台中创建实例咯,和以前不一样的就是,这次我们只需要1张4090!这就是属于LoRA微调的怜悯(对钱包的怜悯)。

在AI模型列表中找到我们需要的那一位,也是上一期的主角,Qwen2.5-1.5B Instruct版本,正好可以对比一下相同模型使用不同的训练方法的差异。

### Qwen2.5-1.5B-Instruct Model Information and Usage Guide #### Overview of the Qwen2.5-1.5B-Instruct Model The Qwen2.5 series, including the 1.5 billion parameter version (Qwen2.5-1.5B), is designed specifically to enhance conversational abilities through specialized instruction tuning[^1]. This model variant aims at providing robust performance in dialogue-based applications while maintaining efficiency. #### Installation and Setup Instructions To begin using this particular instantiation of the Qwen architecture: 1. **Source Code Acquisition** For obtaining the necessary source code associated with Qwen2.5-1.5B-Instruct, one should follow standard procedures outlined within documentation or repository guidelines provided by developers[^3]. 2. **Environment Configuration** Ensure that an appropriate environment has been configured on your system which supports running large-scale language models like those from the Qwen family. Considerations include hardware specifications such as GPU availability along with software dependencies required for execution. #### Fine-Tuning Process Details When considering fine-tuning operations involving LORA configurations, it's important to note potential limitations related to memory constraints during training phases even when attempting minimal adjustments: ```yaml # Example configuration snippet demonstrating how certain settings can impact resource utilization. deepspeed: configs/ds_zero_3.json # Uncommenting may lead to out-of-memory errors despite lowering other parameters. ``` This indicates careful attention must be paid towards balancing computational resources against desired modifications intended for improving specific aspects of model behavior without exceeding available capacity limits imposed by physical hardware boundaries. #### Performance Benchmarks Against Competitors Comparatively speaking, earlier iterations within the same lineage have demonstrated superior capabilities across various evaluation metrics compared to contemporaries such as LLAMA2 variants[^2], suggesting continued advancements likely position newer releases favorably relative to existing alternatives currently present within similar categories based upon previous trends observed throughout development cycles up until now. --related questions-- 1. What are some best practices for optimizing the deployment process of Qwen2.5-1.5B-Instruct? 2. How does Qwen2.5-1.5B-Instruct perform in low-resource environments concerning inference speed versus accuracy trade-offs? 3. Can you provide examples where Qwen2.5-1.5B-Instruct excels particularly well over its predecessors? 4. Are there any known issues regarding compatibility between different versions of Qwen architectures used together in a single application stack?
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