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Home»ADOPTION NEWS»Reading chunks and UVMs to improve Polars GPU Parquet Reader Performance
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Reading chunks and UVMs to improve Polars GPU Parquet Reader Performance

By Crypto FlexsApril 14, 20253 Mins Read
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Reading chunks and UVMs to improve Polars GPU Parquet Reader Performance
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Ted Hirokawa
April 11, 2025 07:05

Polars GPU Parquet Reader uses chunky reading and integrated virtual memory to improve performance to improve the data processing function of large data sets.





The performance of the data processing tool is important when processing large data sets. According to NVIDIA’s blogs, Polars, a famous open source library with speed and efficiency, now provides back -ends withdrawal from the GPU driven by CUDF to greatly improve their performance.

Solving tasks with unchunked readers

Polars GPU Parquet Reader (up to 24.10) had a problem with scaling when processing a larger data set. As the scale factors increased, the performance decreased especially beyond the SF200 mark. This is due to memory constraints when loading a significant paracket file to the GPU’s memory.

Introduction to Chunk Park Reading

In order to alleviate memory limitations, a green park reader has been introduced. By reading a parquet file in a small chunk, you can reduce memory footprints to make the polars GPU more efficiently processed. For example, if you implement a 16GB pass lead tree, you can run better in various queries compared to the quartet.

Use UVM (Unified Virtual Memory)

Chunked Reading improves memory management, but integrating UVM enhances performance by allowing GPUs to access system memory directly. This reduces memory constraints and improves data transfer efficiency. The combination of chunk reading and UVM can affect throughput, but can successfully run queries in higher scale factors.

Stability and throughput optimization

Select Rights pass_read_limit It is essential to maintain stability and throughput balance. The 16GB or 32GB limit is optimal, and the former allows all queries to succeed without exception without memory. This optimization is important for maintaining high performance in larger data sets.

Compare the Chunk GPU and CPU approach

Even with chunks, the observed throughput usually surpasses the processing amount of CPU -based polar. 16GB or 32GB pass_read_limit It promotes successful execution at higher factors compared to how to shine, making chunks GPU a good choice to handle a wide range of data sets.

conclusion

In the case of the Polars GPU, using UVM is more effective than CPU -based methods and readers, especially large data sets and large factors. By optimizing the data load process, you can unlock significant performance improvements. recent cudf-polars (Version 24.12 or more), Chunked Parquet Reader and UVM are standard approaches, providing significant improvements in all query and scale factors.

For more information, visit the NVIDIA blog.

Image Source: Shutter Stock


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