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Home»ADOPTION NEWS»Improved UMAP performance on GPU using RAPIDS cuML
ADOPTION NEWS

Improved UMAP performance on GPU using RAPIDS cuML

By Crypto FlexsNovember 2, 20243 Mins Read
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Improved UMAP performance on GPU using RAPIDS cuML
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james ding
November 1, 2024 11:49

RAPIDS cuML addresses the challenges of processing large datasets with new algorithms for improved performance by introducing a faster, more scalable UMAP implementation using GPU acceleration.





The latest advancements in RAPIDS cuML promise a significant leap forward in the processing speed and scalability of Uniform Manifold Approximation and Projection (UMAP), a dimensionality reduction algorithm widely used in a variety of fields, including bioinformatics and natural language processing. The enhancements, detailed by Jinsol Park on the NVIDIA Developer Blog, leverage GPU acceleration to solve the problem of processing large datasets.

Solving the challenges of UMAP

The performance bottleneck of UMAP has traditionally been the construction of all-neighbor graphs, a process that becomes increasingly time-consuming as data set sizes grow. Initially, RAPIDS cuML utilized a brute-force approach to graph construction, which, while thorough, did not scale well. As data set size scales, the time required for this step increases quadratically, often accounting for more than 99% of the total processing time.

Moreover, the requirement that the entire dataset fit into GPU memory created additional obstacles, especially when processing datasets that exceed the memory capacity of consumer-level GPUs.

Innovative solutions using NN-Descent

RAPIDS cuML 24.10 addresses these issues using a new batch Approximous Nearest Neighbor (ANN) algorithm. This approach leverages the nearest neighbor descent (NN-descent) algorithm from the RAPIDS cuVS library. This algorithm effectively constructs an all-neighbor graph by reducing the number of distance calculations required, resulting in significant speedup over existing methods.

The introduction of batch processing capabilities further improves scalability, allowing large data sets to be processed segment by segment. This method not only accommodates datasets that exceed GPU memory limits, but also maintains the accuracy of UMAP embeddings.

Significant performance improvement

Benchmark results demonstrate the dramatic impact of these improvements. For example, a dataset containing 20 million points and 384 dimensions achieved a 311x speedup, reducing GPU processing time from 10 hours to just 2 minutes. These substantial improvements were achieved without compromising the quality of UMAP embeddings, as evidenced by consistent confidence scores.

Implemented without code changes

One of the great features of the RAPIDS cuML 24.10 update is its ease of use. Users benefit from performance improvements without having to change existing code. The UMAP estimator now includes additional parameters for users who want more control over the graphing process, allowing users to specify the algorithm and adjust settings for optimal performance.

Overall, RAPIDS cuML’s advancements in UMAP processing mark an important milestone in the field of data science, allowing researchers and developers to work more efficiently with larger datasets on GPUs.

Image source: Shutterstock


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