{"id":418,"date":"2025-10-21T17:13:30","date_gmt":"2025-10-21T09:13:30","guid":{"rendered":"https:\/\/blog.libra5.cool\/?p=418"},"modified":"2025-10-21T17:15:05","modified_gmt":"2025-10-21T09:15:05","slug":"%e5%88%86%e5%b8%83%e5%bc%8f%e7%b3%bb%e7%bb%9f%e5%ad%a6%e4%b9%a0%e5%b0%8f%e8%ae%b012-spark-%e6%b5%85%e8%b0%88","status":"publish","type":"post","link":"https:\/\/blog.libra5.cool\/?p=418","title":{"rendered":"\u5206\u5e03\u5f0f\u7cfb\u7edf\u5b66\u4e60\u5c0f\u8bb012\u00a0\u2014\u2014\u00a0Spark \u6d45\u8c08"},"content":{"rendered":"\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u201cHi\uff0c\u8fd9\u662f\u5c0f5\u81ea\u5b66\u7b97\u529b\u5927\u96c6\u7fa4\u76f8\u5173\u77e5\u8bc6\u7684\u7b2c12\u7bc7\u7b14\u8bb0\u3002\u8fd9\u4e00\u671f\u6211\u4eec\u4f1a\u5bf9Spark\u8fdb\u884c\u7b80\u5355\u7684\u4e86\u89e3\u3002\u201d<\/p>\n<cite>\u6458\u8981<\/cite><\/blockquote>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p>Spark\u672c\u8d28\u4e0a\u662f\u5bf9MapReduce\u7684\u7ee7\u627f\u4e0e\u53d1\u5c55\u3002\u5b83\u5728\u5f53\u4eca\u7684\u6570\u636e\u4e2d\u5fc3\u8ba1\u7b97\u4e2d\u5f97\u5230\u4e86\u5e7f\u6cdb\u5e94\u7528\u3002<\/p>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p>\u5f53Spark\uff0c\u8bfb\u53d6\u6587\u4ef6\u65f6\uff0c\u5b83\u5b9e\u9645\u4e0a\u662f\u4ece\u7c7b\u4f3cGFS\u7684\u5206\u5e03\u5f0f\u6587\u4ef6\u7cfb\u7edf\u4e2d\u8bfb\u53d6\u6587\u4ef6\uff08HDFS\uff09\u3002\u5047\u8bbe\u6211\u4eec\u7684\u4e00\u4e2a\u6587\u4ef6\uff0c\u5373\u8f93\u5165\u6587\u4ef6\uff0c\u5df2\u7ecf\u88ab\u5206\u5272\u6210\u8bb8\u591a\uff0c\u6bd4\u598264\u5146\u5b57\u8282\u6216\u4efb\u4f55\u53ef\u80fd\u7684\u5927\u5c0f\uff0c\u5728HDFS\u4e2d\u3002Spark\u77e5\u9053\u5f53\u4f60\u5f00\u59cb\u8c03\u7528collect\u6765\u542f\u52a8\u8ba1\u7b97\u65f6\uff0c\u8f93\u5165\u6570\u636e\u5df2\u7ecf\u5728HDFS\u4e2d\u5206\u533a\uff0c\u5e76\u4e14\u5b83\u5c06\u5c1d\u8bd5\u4ee5\u76f8\u5e94\u7684\u65b9\u5f0f\u5206\u914d\u5de5\u4f5c\uff0c\u8ba9\u5de5\u4f5c\u8005\u8fdb\u884c\u76f8\u5e94\u7684\u5206\u5de5\u3002\u5bf9\u4e8e\u8f93\u5165\u6587\u4ef6\u800c\u8a00\uff0c\u6bcf\u4e2a\u5de5\u4f5c\u8282\u70b9\u90fd\u4f1a\u8bfb\u53d6\u8be5\u8f93\u5165\u6587\u4ef6\u7684\u4e00\u90e8\u5206\u3002<\/p>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p>Spark\u5728\u5f00\u59cb\u4efb\u4f55\u6570\u636e\u5904\u7406\u4e4b\u524d\uff0c\u4f1a\u521b\u5efa\u5b8c\u6574\u7684\u8840\u7edf\u56fe\u3002\u4e4b\u540e\u4e0b\u4e00\u6b65\u662f\u6620\u5c04\u9636\u6bb5\uff0c\u5176\u4e2d\u6bcf\u4e2a\u5de5\u4f5c\u8282\u70b9\u5e94\u6267\u884c\u4e00\u4e2a\u5c0f\u51fd\u6570\uff0c\u8be5\u51fd\u6570\u5c06\u8f93\u5165\u7684\u6bcf\u4e00\u884c\u5206\u5272\u6210\u4e00\u4e2afrom-to-link \u94fe\u63a5\u5143\u7ec4\u3002\u8fd9\u662f\u4e00\u79cd\u7eaf\u7cb9\u7684\u672c\u5730\u64cd\u4f5c\uff0c\u56e0\u6b64\u53ef\u4ee5\u5728\u540c\u4e00\u4e2a\u5de5\u4f5c\u8282\u70b9\u4e0a\u8fdb\u884c\u3002Spark\u5e76\u975e\u5148\u8bfb\u53d6\u6574\u4e2a\u8f93\u5165\u5206\u533a\uff0c\u518d\u5bf9\u5176\u6267\u884c\u6620\u5c04\u64cd\u4f5c\uff0c\u800c\u662f\u8bfb\u53d6\u7b2c\u4e00\u6761\u8bb0\u5f55\uff0c\u6216\u8005\u53ef\u80fd\u53ea\u662f\u6700\u521d\u7684\u51e0\u6761\u8bb0\u5f55\uff0c\u7136\u540e\u5bf9\u6bcf\u6761\u8bb0\u5f55\u8fdb\u884c\u6620\u5c04\u5904\u7406\u3002\u5b9e\u9645\u4e0a\uff0c\u5b83\u4f1a\u5bf9\u6bcf\u6761\u8bb0\u5f55\u5c3d\u53ef\u80fd\u591a\u5730\u5e94\u7528\u8f6c\u6362\u64cd\u4f5c\uff0c\u4e4b\u540e\u624d\u7ee7\u7eed\u4ece\u6587\u4ef6\u4e2d\u8bfb\u53d6\u4e0b\u4e00\u90e8\u5206\u5185\u5bb9\u3002\u8fd9\u6837\u505a\u7684\u76ee\u7684\u662f\u4e3a\u4e86\u907f\u514d\u5b58\u50a8\u6574\u4e2a\u8f93\u5165\u6587\u4ef6\uff0c\u56e0\u4e3a\u8fd9\u4e9b\u6587\u4ef6\u53ef\u80fd\u975e\u5e38\u5e9e\u5927\u3002\u6309\u8bb0\u5f55\u9010\u6761\u5904\u7406\u663e\u7136\u66f4\u529b\u9ad8\u6548\u3002\u8fd9\u5c31\u662f\u6240\u8bf4\u7684\u201c\u7a84\u4f9d\u8d56&#8221;\u60c5\u51b5\u4e0b\u7684\u5904\u7406\u8fc7\u7a0b\uff0c\u5373\u90a3\u4e9b\u4ec5\u8003\u8651\u6bcf\u4e2a\u6570\u636e\u8bb0\u5f55\u72ec\u7acb\u5904\u7406\uff0c\u65e0\u9700\u62c5\u5fc3\u4e0e\u5176\u4ed6\u8bb0\u5f55\u5173\u7cfb\u7684\u8f6c\u6362\u64cd\u4f5c\u3002<\/p>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p>\u4e0eMapReduce\u76f8\u6bd4\u8fd0\u884c\u6548\u7387\u66f4\u9ad8\u3001\u66f4\u5feb\u3002\u56e0\u4e3a\u5982\u679c\u6709\u591a\u4e2a\u76f8\u5f53\u4e8e\u6620\u5c04\u9636\u6bb5\u7684\u64cd\u4f5c\uff0c\u5b83\u4eec\u5728\u5185\u5b58\u4e2d\u53ea\u662f\u7b80\u5355\u5730\u4e32\u8054\u8d77\u6765\uff1b\u800cMapReduce\uff0c\u5373\u4f7f\u8fd0\u884c\u7684\u662f\u4e00\u4e9b\u9000\u5316\u5230\u4ec5\u5305\u542b\u6620\u5c04\u9636\u6bb5\u7684MapReduce\u5e94\u7528\uff0c\u6bcf\u4e2a\u9636\u6bb5\u90fd\u4f1a\u4eceGFS\u8bfb\u53d6\u8f93\u5165\uff0c\u8fdb\u884c\u8ba1\u7b97\uff0c\u7136\u540e\u5c06\u8f93\u51fa\u5199\u56deGFS\uff0c\u7d27\u63a5\u7740\u4e0b\u4e00\u9636\u6bb5\u518d\u8fdb\u884c\u8bfb\u53d6\u3001\u8ba1\u7b97\u3001\u5199\u5165\u3002<\/p>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u5173\u4e8e\u5e7f\u57df\u53d8\u6362\uff08wide transformations\uff09<\/strong><\/li>\n<\/ul>\n\n\n\n<p>Spark\u53ef\u80fd\u9700\u8981\u67e5\u770b\u8f93\u5165\u7684\u6240\u6709\u5206\u533a\uff0c\u8fd9\u548cMapReduce\u4e2d\u7684 reduce \u64cd\u4f5c\u975e\u5e38\u76f8\u4f3c\u3002\u901a\u5e38\u60c5\u51b5\u4e0b\uff0c\u6267\u884c\u6620\u5c04\uff08map\uff09\u4efb\u52a1\u7684\u5de5\u4eba\uff08workers\uff09\u4e5f\u4f1a\u6267\u884c\u533a\u5206\uff08distinct\uff09\u4efb\u52a1\uff0c\u4f46\u6570\u636e\u9700\u8981\u5728\u4e24\u4e2a\u53d8\u6362\u4e4b\u95f4\u79fb\u52a8\uff0c\u4ee5\u5c06\u6240\u6709\u952e\u6c47\u805a\u5728\u4e00\u8d77\u3002<\/p>\n\n\n\n<p>Spark\u4f1a\u83b7\u53d6\u8fd9\u4e2a map 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