You can perform rank tuning in QLoRA for a large language model by sweeping over different r values in LoraConfig and evaluating model performance on a validation set.
Here is the code snippet you can refer to:

In the above code we are using the following key strategies:
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Dynamically tests multiple ranks (r) to optimize parameter efficiency.
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Evaluates validation loss for performance comparison.
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Enables trade-off tuning between compute cost and accuracy.
Hence, rank tuning in QLoRA allows strategic balancing of adaptation capacity and resource usage, optimizing large model fine-tuning across different deployment needs.