{"id":247348,"date":"2024-01-02T20:50:24","date_gmt":"2024-01-02T12:50:24","guid":{"rendered":"https:\/\/www.idc.net\/help\/247348\/"},"modified":"2024-01-02T20:50:24","modified_gmt":"2024-01-02T12:50:24","slug":"mongodb-%e6%9c%af%e8%af%ad-map-reduce","status":"publish","type":"post","link":"https:\/\/idc.net\/help\/247348\/","title":{"rendered":"MongoDB \u672f\u8bed &#8211; Map-Reduce"},"content":{"rendered":"<p><title id=\"mongodb-%e6%9c%af%e8%af%ad-map-reduce-EBEkquHVcH\">MongoDB \u672f\u8bed - Map-Reduce<\/title><\/p>\n<h1 id=\"mongodb-%e6%9c%af%e8%af%ad-map-reduce-EBEkquHVcH\">MongoDB \u672f\u8bed - Map-Reduce<\/h1>\n<h2 id=\"%e4%bb%80%e4%b9%88%e6%98%af-map-reduce%ef%bc%9f-EBEkquHVcH\">\u4ec0\u4e48\u662f Map-Reduce\uff1f<\/h2>\n<p>Map-Reduce \u662f\u4e00\u79cd\u7528\u4e8e\u5904\u7406\u5927\u89c4\u6a21\u6570\u636e\u96c6\u7684\u7f16\u7a0b\u6a21\u578b\u548c\u7b97\u6cd5\u3002\u5b83\u662f\u4e00\u79cd\u5206\u5e03\u5f0f\u8ba1\u7b97\u65b9\u6cd5\uff0c\u7528\u4e8e\u5c06\u5927\u89c4\u6a21\u6570\u636e\u96c6\u5206\u89e3\u6210\u5c0f\u5757\uff0c\u7136\u540e\u5728\u591a\u4e2a\u8ba1\u7b97\u8282\u70b9\u4e0a\u8fdb\u884c\u5e76\u884c\u5904\u7406\uff0c\u6700\u540e\u5c06\u7ed3\u679c\u5408\u5e76\u6210\u4e00\u4e2a\u6700\u7ec8\u7ed3\u679c\u3002<\/p>\n<h2 id=\"map-reduce-%e7%9a%84%e5%b7%a5%e4%bd%9c%e5%8e%9f%e7%90%86-EBEkquHVcH\">Map-Reduce \u7684\u5de5\u4f5c\u539f\u7406<\/h2>\n<p>Map-Reduce \u7684\u5de5\u4f5c\u8fc7\u7a0b\u53ef\u4ee5\u5206\u4e3a\u4e24\u4e2a\u9636\u6bb5\uff1aMap \u9636\u6bb5\u548c Reduce \u9636\u6bb5\u3002<\/p>\n<h3 id=\"map-%e9%98%b6%e6%ae%b5-EBEkquHVcH\">Map \u9636\u6bb5<\/h3>\n<p>\u5728 Map \u9636\u6bb5\uff0c\u8f93\u5165\u6570\u636e\u96c6\u88ab\u5206\u89e3\u6210\u591a\u4e2a\u5c0f\u5757\uff0c\u5e76\u7531\u591a\u4e2a\u8ba1\u7b97\u8282\u70b9\u5e76\u884c\u5904\u7406\u3002\u6bcf\u4e2a\u8ba1\u7b97\u8282\u70b9\u5c06\u8f93\u5165\u6570\u636e\u96c6\u7684\u6bcf\u4e2a\u5143\u7d20\u6620\u5c04\u4e3a\u4e00\u4e2a\u952e\u503c\u5bf9\u3002\u8fd9\u4e2a\u952e\u503c\u5bf9\u5305\u542b\u4e24\u4e2a\u90e8\u5206\uff1a\u952e\u548c\u503c\u3002\u952e\u7528\u4e8e\u6807\u8bc6\u6570\u636e\u5143\u7d20\u7684\u67d0\u4e2a\u5c5e\u6027\uff0c\u503c\u5219\u662f\u5bf9\u5e94\u7684\u6570\u636e\u5143\u7d20\u3002<\/p>\n<p>\u4f8b\u5982\uff0c\u5047\u8bbe\u6709\u4e00\u4e2a\u5305\u542b\u5b66\u751f\u4fe1\u606f\u7684\u6570\u636e\u96c6\uff0c\u6bcf\u4e2a\u5b66\u751f\u6709\u59d3\u540d\u548c\u6210\u7ee9\u4e24\u4e2a\u5c5e\u6027\u3002\u5728 Map \u9636\u6bb5\uff0c\u6bcf\u4e2a\u8ba1\u7b97\u8282\u70b9\u5c06\u8f93\u5165\u6570\u636e\u96c6\u7684\u6bcf\u4e2a\u5b66\u751f\u6620\u5c04\u4e3a\u4e00\u4e2a\u952e\u503c\u5bf9\uff0c\u5176\u4e2d\u952e\u662f\u5b66\u751f\u7684\u59d3\u540d\uff0c\u503c\u662f\u5b66\u751f\u7684\u6210\u7ee9\u3002<\/p>\n<h3 id=\"reduce-%e9%98%b6%e6%ae%b5-EBEkquHVcH\">Reduce \u9636\u6bb5<\/h3>\n<p>\u5728 Reduce \u9636\u6bb5\uff0c\u8ba1\u7b97\u8282\u70b9\u5c06 Map \u9636\u6bb5\u4ea7\u751f\u7684\u952e\u503c\u5bf9\u6309\u7167\u952e\u8fdb\u884c\u5206\u7ec4\uff0c\u5e76\u5bf9\u6bcf\u4e2a\u952e\u7684\u503c\u8fdb\u884c\u805a\u5408\u8ba1\u7b97\u3002\u805a\u5408\u8ba1\u7b97\u53ef\u4ee5\u662f\u6c42\u548c\u3001\u6c42\u5e73\u5747\u503c\u3001\u6c42\u6700\u5927\u503c\u7b49\u7b49\u3002\u6700\u7ec8\uff0c\u6bcf\u4e2a\u952e\u5c06\u5bf9\u5e94\u4e00\u4e2a\u805a\u5408\u7ed3\u679c\u3002<\/p>\n<p>\u7ee7\u7eed\u4ee5\u4e0a\u9762\u7684\u4f8b\u5b50\uff0c\u5047\u8bbe\u6709\u4e24\u4e2a\u8ba1\u7b97\u8282\u70b9\uff0c\u6bcf\u4e2a\u8282\u70b9\u5728 Map \u9636\u6bb5\u4ea7\u751f\u4e86\u4e00\u4e9b\u952e\u503c\u5bf9\u3002\u5728 Reduce \u9636\u6bb5\uff0c\u8fd9\u4e9b\u952e\u503c\u5bf9\u5c06\u6309\u7167\u952e\u8fdb\u884c\u5206\u7ec4\uff0c\u5e76\u5bf9\u6bcf\u4e2a\u952e\u7684\u503c\u8fdb\u884c\u6c42\u548c\u8ba1\u7b97\u3002\u6700\u7ec8\uff0c\u6bcf\u4e2a\u5b66\u751f\u7684\u59d3\u540d\u5c06\u5bf9\u5e94\u4e00\u4e2a\u603b\u6210\u7ee9\u3002<\/p>\n<h2 id=\"map-reduce-%e5%9c%a8-mongodb-%e4%b8%ad%e7%9a%84%e5%ba%94%e7%94%a8-EBEkquHVcH\">Map-Reduce \u5728 MongoDB \u4e2d\u7684\u5e94\u7528<\/h2>\n<p>MongoDB \u662f\u4e00\u4e2a\u5f00\u6e90\u7684\u6587\u6863\u6570\u636e\u5e93\uff0c\u5b83\u652f\u6301 Map-Reduce \u6a21\u578b\u3002\u5728 MongoDB \u4e2d\uff0cMap-Reduce \u53ef\u4ee5\u7528\u4e8e\u5904\u7406\u5927\u89c4\u6a21\u6570\u636e\u96c6\uff0c\u8fdb\u884c\u6570\u636e\u5206\u6790\u548c\u805a\u5408\u8ba1\u7b97\u3002<\/p>\n<p>\u4f7f\u7528 Map-Reduce \u5728 MongoDB \u4e2d\u8fdb\u884c\u6570\u636e\u5206\u6790\u548c\u805a\u5408\u8ba1\u7b97\u7684\u6b65\u9aa4\u5982\u4e0b\uff1a<\/p>\n<ol>\n<li>\u5b9a\u4e49 Map \u51fd\u6570\u548c Reduce \u51fd\u6570\u3002<\/li>\n<li>\u5c06 Map \u51fd\u6570\u548c Reduce \u51fd\u6570\u4f20\u9012\u7ed9 MongoDB \u7684 MapReduce \u65b9\u6cd5\u3002<\/li>\n<li>\u6267\u884c MapReduce \u65b9\u6cd5\uff0cMongoDB \u5c06\u81ea\u52a8\u5c06\u6570\u636e\u96c6\u5206\u89e3\u6210\u5c0f\u5757\uff0c\u5e76\u5728\u591a\u4e2a\u8ba1\u7b97\u8282\u70b9\u4e0a\u8fdb\u884c\u5e76\u884c\u5904\u7406\u3002<\/li>\n<li>\u83b7\u53d6 MapReduce \u65b9\u6cd5\u7684\u7ed3\u679c\u3002<\/li>\n<\/ol>\n<p>\u901a\u8fc7\u4f7f\u7528 Map-Reduce\uff0c\u53ef\u4ee5\u5728 MongoDB \u4e2d\u8fdb\u884c\u590d\u6742\u7684\u6570\u636e\u5206\u6790\u548c\u805a\u5408\u8ba1\u7b97\uff0c\u4f8b\u5982\u8ba1\u7b97\u5e73\u5747\u503c\u3001\u6c42\u548c\u3001\u8ba1\u6570\u7b49\u7b49\u3002<\/p>\n<h2 id=\"%e6%80%bb%e7%bb%93-EBEkquHVcH\">\u603b\u7ed3<\/h2>\n<p>Map-Reduce \u662f\u4e00\u79cd\u7528\u4e8e\u5904\u7406\u5927\u89c4\u6a21\u6570\u636e\u96c6\u7684\u7f16\u7a0b\u6a21\u578b\u548c\u7b97\u6cd5\u3002\u5b83\u901a\u8fc7\u5c06\u6570\u636e\u96c6\u5206\u89e3\u6210\u5c0f\u5757\uff0c\u5e76\u5728\u591a\u4e2a\u8ba1\u7b97\u8282\u70b9\u4e0a\u8fdb\u884c\u5e76\u884c\u5904\u7406\uff0c\u6700\u540e\u5c06\u7ed3\u679c\u5408\u5e76\u6210\u4e00\u4e2a\u6700\u7ec8\u7ed3\u679c\u3002\u5728 MongoDB \u4e2d\uff0cMap-Reduce \u53ef\u4ee5\u7528\u4e8e\u8fdb\u884c\u6570\u636e\u5206\u6790\u548c\u805a\u5408\u8ba1\u7b97\u3002\u5982\u679c\u60a8\u6b63\u5728\u5bfb\u627e\u4e00\u4e2a\u53ef\u9760\u7684\u4e91\u670d\u52a1\u5668\u63d0\u4f9b\u5546\uff0c\u540e\u6d6a\u4e91\u662f\u60a8\u7684\u9996\u9009\u3002\u60a8\u53ef\u4ee5\u5728\u6211\u4eec\u7684\u5b98\u7f51\u4e86\u89e3\u66f4\u591a\u5173\u4e8e\u9999\u6e2f\u670d\u52a1\u5668\u3001\u7f8e\u56fd\u670d\u52a1\u5668\u548c\u4e91\u670d\u52a1\u5668\u7684\u4fe1\u606f\u3002<\/p>\n<p><a href=\"https:\/\/idc.net\">\u540e\u6d6a\u4e91\u5b98\u7f51<\/a><\/p>\n<p><a href=\"https:\/\/idc.net\">\u9999\u6e2f\u670d\u52a1\u5668\u9996\u9009\u540e\u6d6a\u4e91<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>MongoDB \u672f\u8bed - Map-Reduce MongoDB \u672f\u8bed - Map-Reduce \u4ec0\u4e48\u662f Map [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7038],"tags":[],"class_list":["post-247348","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/247348","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/comments?post=247348"}],"version-history":[{"count":0,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/247348\/revisions"}],"wp:attachment":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/media?parent=247348"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/categories?post=247348"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/tags?post=247348"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}