{"id":10106,"date":"2025-07-04T19:01:23","date_gmt":"2025-07-04T17:01:23","guid":{"rendered":"https:\/\/myoceane.fr\/?p=10106"},"modified":"2025-07-04T19:04:04","modified_gmt":"2025-07-04T17:04:04","slug":"gpu-accelerate-pca","status":"publish","type":"post","link":"https:\/\/myoceane.fr\/index.php\/gpu-accelerate-pca\/","title":{"rendered":"[GPU] \u52a0\u901f\u4e3b\u6210\u5206\u5206\u6790 (PCA)"},"content":{"rendered":"<div id=\"fb-root\"><\/div>\n\n<p style=\"text-align: justify;\">\u6ab8\u6aac\u7238\u5e7e\u5e74\u524d\u6709\u5206\u4eab\u904e\u4e00\u7bc7<a href=\"https:\/\/myoceane.fr\/index.php\/pca-%E4%B8%BB%E6%88%90%E4%BB%BD%E5%88%86%E6%9E%90\/\">\u4e3b\u6210\u5206\u5206\u6790 (Principle Component Analysis) \u539f\u7406<\/a>\u7684\u6587\u7ae0\uff0c\u7531\u65bc PCA \u5176\u5be6\u5c31\u662f\u77e9\u9663\u7684\u904b\u7b97\uff0c\u6240\u4ee5\u975e\u5e38\u9069\u5408\u4f7f\u7528\u5206\u6563\u5f0f\u904b\u7b97\u4f86\u505a\u52a0\u901f\uff0c\u4e0d\u8ad6\u662f Spark \u6216\u662f GPU \u7684\u67b6\u69cb\u90fd\u5f88\u9069\u5408\uff0cSpark MLlib \u672c\u8eab\u5c31\u53ef\u4ee5\u52a0\u901f PCA \u7b49\u6a5f\u5668\u5b78\u7fd2\u7684\u904b\u7b97\uff0c\u4f7f\u7528 cuML + GPU \u6839\u64da <a href=\"https:\/\/developer.nvidia.com\/blog\/new-gpu-library-lowers-compute-costs-for-apache-spark-ml\/\">Nvidia Blog \u7684\u6578\u64da<\/a>\uff0c\u52a0\u901f\u7684\u6548\u679c\u66f4\u52a0\u660e\u986f\uff0c\u672c\u7bc7\u60f3\u8981\u7d00\u9304\u5982\u4f55\u5c0e\u5165 GPU \u5230 PCA \u7b49\u7b49\u50b3\u7d71\u7684\u6a5f\u5668\u5b78\u7fd2\u904b\u7b97\uff1f<\/p>\n\n\n\n<h4>Spark MLlib<\/h4>\n<p>Spark MLlib \u672c\u8eab\u5c31\u662f\u5c07 Machine Learning \u7684\u8a08\u7b97\u900f\u904e Spark \u5be6\u73fe\uff0c\u900f\u904e pyspark.ml \u88e1\u9762\u7684 <a href=\"https:\/\/github.com\/apache\/spark\/blob\/eb5af454e147aea5874b248cf25cf210095373ca\/python\/pyspark\/ml\/feature.py#L6540\">PCA \u985e\u5225<\/a>\u53ef\u4ee5\u5229\u7528\u4ee5\u4e0b\u7684\u7bc4\u4f8b\u5c07 PCA \u7684\u5de5\u4f5c\u5728 Spark \u4e0a\u57f7\u884c\u3002<\/p>\n<pre class=\"lang:python\">&gt;&gt;&gt; from pyspark.ml.linalg import Vectors\n&gt;&gt;&gt; data = [(Vectors.sparse(5, [(1, 1.0), (3, 7.0)]),),\n...     (Vectors.dense([2.0, 0.0, 3.0, 4.0, 5.0]),),\n...     (Vectors.dense([4.0, 0.0, 0.0, 6.0, 7.0]),)]\n&gt;&gt;&gt; df = spark.createDataFrame(data,[\"features\"])\n&gt;&gt;&gt; pca = PCA(k=2, inputCol=\"features\")\n&gt;&gt;&gt; pca.setOutputCol(\"pca_features\")\nPCA...\n&gt;&gt;&gt; model = pca.fit(df)\n&gt;&gt;&gt; model.getK()\n2\n&gt;&gt;&gt; model.setOutputCol(\"output\")\nPCAModel...\n&gt;&gt;&gt; model.transform(df).collect()[0].output\nDenseVector([1.648..., -4.013...])\n&gt;&gt;&gt; model.explainedVariance\nDenseVector([0.794..., 0.205...])\n&gt;&gt;&gt; pcaPath = temp_path + \"\/pca\"\n&gt;&gt;&gt; pca.save(pcaPath)\n&gt;&gt;&gt; loadedPca = PCA.load(pcaPath)\n&gt;&gt;&gt; loadedPca.getK() == pca.getK()\nTrue\n&gt;&gt;&gt; modelPath = temp_path + \"\/pca-model\"\n&gt;&gt;&gt; model.save(modelPath)\n&gt;&gt;&gt; loadedModel = PCAModel.load(modelPath)\n&gt;&gt;&gt; loadedModel.pc == model.pc\nTrue\n&gt;&gt;&gt; loadedModel.explainedVariance == model.explainedVariance\nTrue\n&gt;&gt;&gt; loadedModel.transform(df).take(1) == model.transform(df).take(1)\nTrue<\/pre>\n<p style=\"text-align: justify;\">\u9019\u908a\u503c\u5f97\u95dc\u6ce8\u7684\u662f\u771f\u6b63\u5167\u90e8\u7684\u5be6\u4f5c\u65b9\u6cd5\u9084\u662f\u900f\u904e Java \u7684\u5be6\u4f5c\uff0cpyspark \u53ea\u662f\u4e00\u500b python \u7684 interface\uff0c\u5f9e PCA \u7684\u985e\u5225\u5b9a\u7fa9 <code>class PCA(JavaEstimator[\"PCAModel\"], _PCAParams, JavaMLReadable[\"PCA\"], JavaMLWritable):<\/code> \u6211\u5011\u89c0\u5bdf\u5230\u4ed6\u6709\u7e7c\u627f JavaEstimator[&#8220;PCAModel&#8221;]\u00a0<\/p>\n\n\n\n<h4><a href=\"https:\/\/github.com\/NVIDIA\/spark-rapids-ml\">Spark Rapids ML<\/a><\/h4>\n<p style=\"text-align: justify;\">\u4e0d\u540c\u65bc Spark MLlib \u5982\u679c Spark Rapids ML \u5728\u5be6\u4f5c PCA \u7684\u6642\u5019\u662f\u547c\u53eb\u81ea\u5df1\u7684 PCA python \u985e\u5225 <code>from spark_rapids_ml.feature import PCA<\/code>\uff0c\u5982\u679c\u6211\u5011\u4ed4\u7d30\u53bb\u89c0\u5bdf\u5176\u5be6\u4f5c\u7684\u539f\u7406\uff0c\u5c31\u6703\u767c\u73fe\u5b83\u80cc\u5f8c\u76f4\u63a5\u4f7f\u7528 cuML \u7684\u51fd\u5f0f\u5eab\uff0c\u7531\u65bc cuML \u4e5f\u652f\u63f4\u5f9e python \u9a45\u52d5\uff0c\u6240\u4ee5\u5c31\u5b8c\u7f8e\u76f8\u5bb9\uff0c\u4ee5\u4e0b\u662f\u5229\u7528 conda \u5b89\u88dd cuML \u7684\u7bc4\u4f8b\uff1a<\/p>\n<pre class=\"lang:bash\">conda create -n rapids-25.06 \\\n    -c rapidsai -c conda-forge -c nvidia \\\n    cuml=25.06 cuvs=25.06 python=3.10 cuda-version=11.8 numpy~=1.0<\/pre>\n<p>\u5b8c\u6574\u7684 python \u7a0b\u5f0f\u78bc\u53ef\u4ee5\u53c3\u8003 <a href=\"https:\/\/github.com\/NVIDIA\/spark-rapids-examples\/tree\/main\/examples\/ML%2BDL-Examples\/Spark-Rapids-ML\/pca\">spark rapids examples<\/a><\/p>\n<h4>\u5982\u679c\u6211\u7684\u57f7\u884c\u74b0\u5883\u662f R \u5462\uff1f<\/h4>\n<p style=\"text-align: justify;\">\u4ee5\u4e0a\u6211\u5011\u5c55\u793a\u7684 PCA \u90fd\u662f\u900f\u904e Python \u7684\u7a0b\u5f0f\u78bc\u5be6\u73fe\u7684\uff0c\u5982\u679c\u9a45\u52d5\u7684\u74b0\u5883\u662f R \u7684\u8a9e\u8a00\u7684\u8a71\uff0c\u5c31\u6703\u662f\u4e00\u500b\u5b8c\u5168\u4e0d\u4e00\u6a23\u7684\u60c5\u6cc1\uff0c\u4ee5\u4e0b\u6211\u5011\u9644\u4e0a <a href=\"https:\/\/spark.posit.co\/packages\/sparklyr\/latest\/reference\/ft_pca.html\">SparklyR \u5be6\u4f5c\u7684 PCA \u51fd\u5f0f<\/a>\uff0c\u80cc\u5f8c\u53ef\u4ee5\u7406\u89e3\u70ba\u76f4\u63a5\u4f7f\u7528 Spark MLlib\u3002<\/p>\n<pre class=\"lang:r\">ft_pca( \n  x, \n  input_col = NULL, \n  output_col = NULL, \n  k = NULL, \n  uid = random_string(\"pca_\"), \n  ... \n) \n \nml_pca(x, features = tbl_vars(x), k = length(features), pc_prefix = \"PC\", ...)<\/pre>\n<h4>SparklyR \u7121\u6cd5\u76f4\u63a5\u4f7f\u7528 Spark Rapids ML<\/h4>\n<p>\u7531\u65bc Spark Rapids ML \u6c92\u6709\u652f\u63f4\u5f9e SparklyR \u53bb\u505a\u9a45\u52d5\uff0c\u6240\u4ee5\u5982\u679c\u8981\u5f9e SparklyR \u53bb\u9a45\u52d5 Spark Rapids ML \u611f\u89ba\u53ef\u4ee5\u4f7f\u7528\u985e\u4f3c pysparklyR \u7684\u88e1\u9762\u7528 reticulate \u7684\u65b9\u5f0f\u53bb\u9a45\u52d5\u3002<\/p>\n<p>\u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6ab8\u6aac\u7238\u5e7e\u5e74\u524d\u6709\u5206\u4eab\u904e\u4e00\u7bc7\u4e3b\u6210\u5206\u5206\u6790 (Principle Component Analysis) \u539f\u7406\u7684\u6587\u7ae0\uff0c\u7531\u65bc PCA \u5176\u5be6\u5c31\u662f\u77e9\u9663\u7684\u904b\u7b97\uff0c\u6240\u4ee5\u975e\u5e38\u9069\u5408\u4f7f\u7528\u5206\u6563\u5f0f\u904b\u7b97\u4f86\u505a\u52a0\u901f\uff0c\u4e0d\u8ad6\u662f Spark \u6216\u662f GPU \u7684\u67b6\u69cb\u90fd\u5f88\u9069\u5408\uff0cSpark MLlib \u672c\u8eab\u5c31\u53ef\u4ee5\u52a0\u901f PCA \u7b49\u6a5f\u5668\u5b78\u7fd2\u7684\u904b\u7b97\uff0c\u4f7f\u7528 cuML + GPU \u6839\u64da Nvidia Blog \u7684\u6578\u64da\uff0c\u52a0\u901f\u7684\u6548\u679c\u66f4\u52a0\u660e\u986f\uff0c\u672c\u7bc7\u60f3\u8981\u7d00\u9304\u5982\u4f55\u5c0e\u5165 GPU \u5230 PCA \u7b49\u7b49\u50b3\u7d71\u7684\u6a5f\u5668\u5b78\u7fd2\u904b\u7b97\uff1f<\/p>\n","protected":false},"author":1,"featured_media":10114,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9,1761,14,176],"tags":[1764,204,1912],"class_list":["post-10106","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-bigdata-ml","category-gpu","category-it-technology","category-python","tag-gpu","tag-pca","tag-spark-rapids-ml"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>[GPU] \u52a0\u901f\u4e3b\u6210\u5206\u5206\u6790 (PCA) - \u60f3\u65b9\u6d89\u6cd5 - \u91cf\u74f6\u5916\u7684\u5929\u7a7a M-Y-Oceane<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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