{"id":63708,"date":"2024-10-14T01:48:18","date_gmt":"2024-10-13T17:48:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/63708\/"},"modified":"2024-10-14T01:48:18","modified_gmt":"2024-10-13T17:48:18","slug":"mongodb%e8%a1%93%e8%aa%9e-%e8%ae%80%e5%8f%96%e5%81%8f%e5%a5%bd","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/63708\/","title":{"rendered":"MongoDB\u8853\u8a9e &#8211; \u8b80\u53d6\u504f\u597d"},"content":{"rendered":"<h1 id=\"mongodb%e8%a1%93%e8%aa%9e-%e8%ae%80%e5%8f%96%e5%81%8f%e5%a5%bd-dfUBydvKCO\">MongoDB\u8853\u8a9e &#8211; \u8b80\u53d6\u504f\u597d<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u6578\u64da\u9a45\u52d5\u4e16\u754c\u4e2d\uff0cMongoDB\u4f5c\u70ba\u4e00\u7a2e\u6d41\u884c\u7684NoSQL\u6578\u64da\u5eab\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u5404\u7a2e\u61c9\u7528\u7a0b\u5e8f\u4e2d\u3002\u5176\u9748\u6d3b\u7684\u6578\u64da\u6a21\u578b\u548c\u9ad8\u6548\u7684\u67e5\u8a62\u80fd\u529b\u4f7f\u5176\u6210\u70ba\u958b\u767c\u8005\u7684\u9996\u9078\u3002\u7136\u800c\uff0c\u5c0d\u65bc\u4f7f\u7528MongoDB\u7684\u958b\u767c\u8005\u4f86\u8aaa\uff0c\u7406\u89e3\u5176\u8853\u8a9e\u548c\u914d\u7f6e\u9078\u9805\u662f\u81f3\u95dc\u91cd\u8981\u7684\uff0c\u5176\u4e2d\u4e4b\u4e00\u4fbf\u662f\u300c\u8b80\u53d6\u504f\u597d\u300d\uff08Read Preference\uff09\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e8%ae%80%e5%8f%96%e5%81%8f%e5%a5%bd%ef%bc%9f-dfUBydvKCO\">\u4ec0\u9ebc\u662f\u8b80\u53d6\u504f\u597d\uff1f<\/h2>\n<p>\u8b80\u53d6\u504f\u597d\u662fMongoDB\u4e2d\u4e00\u500b\u91cd\u8981\u7684\u914d\u7f6e\u9078\u9805\uff0c\u5141\u8a31\u7528\u6236\u6307\u5b9a\u5f9e\u54ea\u500b\u526f\u672c\u96c6\u6210\u7684\u6210\u54e1\u8b80\u53d6\u6578\u64da\u3002\u9019\u5c0d\u65bc\u63d0\u9ad8\u61c9\u7528\u7a0b\u5e8f\u7684\u6027\u80fd\u548c\u53ef\u7528\u6027\u81f3\u95dc\u91cd\u8981\uff0c\u7279\u5225\u662f\u5728\u5206\u4f48\u5f0f\u7cfb\u7d71\u4e2d\u3002MongoDB\u7684\u526f\u672c\u96c6\u7531\u4e00\u500b\u4e3b\u7bc0\u9ede\u548c\u591a\u500b\u5f9e\u7bc0\u9ede\u7d44\u6210\uff0c\u4e3b\u7bc0\u9ede\u8ca0\u8cac\u8655\u7406\u6240\u6709\u7684\u5beb\u5165\u64cd\u4f5c\uff0c\u800c\u5f9e\u7bc0\u9ede\u5247\u7528\u65bc\u8b80\u53d6\u64cd\u4f5c\u3002<\/p>\n<h2 id=\"%e8%ae%80%e5%8f%96%e5%81%8f%e5%a5%bd%e7%9a%84%e9%a1%9e%e5%9e%8b-dfUBydvKCO\">\u8b80\u53d6\u504f\u597d\u7684\u985e\u578b<\/h2>\n<p>MongoDB\u63d0\u4f9b\u4e86\u5e7e\u7a2e\u4e0d\u540c\u7684\u8b80\u53d6\u504f\u597d\u8a2d\u7f6e\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u6839\u64da\u61c9\u7528\u7a0b\u5e8f\u7684\u9700\u6c42\u9078\u64c7\u5408\u9069\u7684\u8a2d\u7f6e\uff1a<\/p>\n<ul>\n<li><strong>primary<\/strong>\uff1a\u9019\u662f\u9ed8\u8a8d\u7684\u8b80\u53d6\u504f\u597d\uff0c\u6240\u6709\u7684\u8b80\u53d6\u64cd\u4f5c\u90fd\u6703\u5f9e\u4e3b\u7bc0\u9ede\u9032\u884c\u3002\u9019\u78ba\u4fdd\u4e86\u8b80\u53d6\u7684\u6578\u64da\u662f\u6700\u65b0\u7684\uff0c\u4f46\u53ef\u80fd\u6703\u5c0e\u81f4\u4e3b\u7bc0\u9ede\u7684\u8ca0\u64d4\u904e\u91cd\u3002<\/li>\n<li><strong>primaryPreferred<\/strong>\uff1a\u9019\u7a2e\u8a2d\u7f6e\u6703\u512a\u5148\u5f9e\u4e3b\u7bc0\u9ede\u8b80\u53d6\u6578\u64da\uff0c\u4f46\u5982\u679c\u4e3b\u7bc0\u9ede\u4e0d\u53ef\u7528\uff0c\u5247\u6703\u5f9e\u5f9e\u7bc0\u9ede\u8b80\u53d6\u3002\u9019\u6a23\u53ef\u4ee5\u5728\u4e3b\u7bc0\u9ede\u6545\u969c\u6642\u4fdd\u6301\u53ef\u7528\u6027\u3002<\/li>\n<li><strong>secondary<\/strong>\uff1a\u6240\u6709\u7684\u8b80\u53d6\u64cd\u4f5c\u90fd\u5c07\u5f9e\u5f9e\u7bc0\u9ede\u9032\u884c\u3002\u9019\u53ef\u4ee5\u6e1b\u8f15\u4e3b\u7bc0\u9ede\u7684\u8ca0\u64d4\uff0c\u4f46\u53ef\u80fd\u6703\u5c0e\u81f4\u8b80\u53d6\u5230\u7684\u6578\u64da\u4e0d\u662f\u6700\u65b0\u7684\u3002<\/li>\n<li><strong>secondaryPreferred<\/strong>\uff1a\u512a\u5148\u5f9e\u5f9e\u7bc0\u9ede\u8b80\u53d6\u6578\u64da\uff0c\u4f46\u5982\u679c\u6c92\u6709\u53ef\u7528\u7684\u5f9e\u7bc0\u9ede\uff0c\u5247\u6703\u56de\u9000\u5230\u4e3b\u7bc0\u9ede\u3002\u9019\u6a23\u53ef\u4ee5\u5728\u4e0d\u5f71\u97ff\u6027\u80fd\u7684\u60c5\u6cc1\u4e0b\uff0c\u4fdd\u6301\u4e00\u5b9a\u7684\u6578\u64da\u4e00\u81f4\u6027\u3002<\/li>\n<li><strong>nearest<\/strong>\uff1a\u5f9e\u5ef6\u9072\u6700\u4f4e\u7684\u53ef\u7528\u7bc0\u9ede\u8b80\u53d6\u6578\u64da\uff0c\u7121\u8ad6\u662f\u4e3b\u7bc0\u9ede\u9084\u662f\u5f9e\u7bc0\u9ede\u3002\u9019\u5c0d\u65bc\u9700\u8981\u5feb\u901f\u97ff\u61c9\u7684\u61c9\u7528\u7a0b\u5e8f\u975e\u5e38\u6709\u7528\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%a6%82%e4%bd%95%e8%a8%ad%e7%bd%ae%e8%ae%80%e5%8f%96%e5%81%8f%e5%a5%bd-dfUBydvKCO\">\u5982\u4f55\u8a2d\u7f6e\u8b80\u53d6\u504f\u597d<\/h2>\n<p>\u5728MongoDB\u4e2d\u8a2d\u7f6e\u8b80\u53d6\u504f\u597d\u975e\u5e38\u7c21\u55ae\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528MongoDB\u9a45\u52d5\u7a0b\u5e8f\u7684\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u8a2d\u7f6e\u8b80\u53d6\u504f\u597d\uff1a<\/p>\n<pre><code>\n\/\/ \u4f7f\u7528MongoDB Node.js\u9a45\u52d5\u7a0b\u5e8f\nconst { MongoClient } = require('mongodb');\n\nasync function run() {\n    const client = new MongoClient('mongodb:\/\/localhost:27017', {\n        readPreference: 'secondaryPreferred' \/\/ \u8a2d\u7f6e\u8b80\u53d6\u504f\u597d\n    });\n\n    try {\n        await client.connect();\n        const database = client.db('test');\n        const collection = database.collection('users');\n\n        const users = await collection.find().toArray();\n        console.log(users);\n    } finally {\n        await client.close();\n    }\n}\n\nrun().catch(console.dir);\n<\/code><\/pre>\n<h2 id=\"%e9%81%b8%e6%93%87%e5%90%88%e9%81%a9%e7%9a%84%e8%ae%80%e5%8f%96%e5%81%8f%e5%a5%bd-dfUBydvKCO\">\u9078\u64c7\u5408\u9069\u7684\u8b80\u53d6\u504f\u597d<\/h2>\n<p>\u9078\u64c7\u5408\u9069\u7684\u8b80\u53d6\u504f\u597d\u53d6\u6c7a\u65bc\u61c9\u7528\u7a0b\u5e8f\u7684\u9700\u6c42\u3002\u4f8b\u5982\uff0c\u5982\u679c\u61c9\u7528\u7a0b\u5e8f\u9700\u8981\u5be6\u6642\u6578\u64da\uff0c\u5247\u61c9\u9078\u64c7\u300cprimary\u300d\u6216\u300cprimaryPreferred\u300d\u3002\u800c\u5982\u679c\u61c9\u7528\u7a0b\u5e8f\u7684\u8b80\u53d6\u91cf\u5927\u65bc\u5beb\u5165\u91cf\uff0c\u5247\u53ef\u4ee5\u8003\u616e\u4f7f\u7528\u300csecondary\u300d\u6216\u300csecondaryPreferred\u300d\uff0c\u4ee5\u6e1b\u8f15\u4e3b\u7bc0\u9ede\u7684\u8ca0\u64d4\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-dfUBydvKCO\">\u7d50\u8ad6<\/h2>\n<p>\u7406\u89e3MongoDB\u7684\u8b80\u53d6\u504f\u597d\u5c0d\u65bc\u512a\u5316\u61c9\u7528\u7a0b\u5e8f\u6027\u80fd\u81f3\u95dc\u91cd\u8981\u3002\u901a\u904e\u5408\u7406\u914d\u7f6e\u8b80\u53d6\u504f\u597d\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u5728\u6578\u64da\u4e00\u81f4\u6027\u548c\u7cfb\u7d71\u6027\u80fd\u4e4b\u9593\u53d6\u5f97\u5e73\u8861\uff0c\u5f9e\u800c\u63d0\u5347\u7528\u6236\u9ad4\u9a57\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u53ef\u7528\u6027\u548c\u53ef\u64f4\u5c55\u6027\u7684\u61c9\u7528\u7a0b\u5e8f\uff0c\u9078\u64c7\u5408\u9069\u7684\u8b80\u53d6\u504f\u597d\u8a2d\u7f6e\u5c07\u662f\u6210\u529f\u7684\u95dc\u9375\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u6709\u95dc<code>VPS<\/code>\u3001<code>\u9999\u6e2fVPS<\/code>\u3001<code>\u670d\u52a1\u5668<\/code>\u3001<code>\u4e91\u670d\u52a1\u5668<\/code>\u6216<code>\u9999\u6e2f\u670d\u52a1\u5668<\/code>\u7684\u4fe1\u606f\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9 <a href=\"https:\/\/server.hk\">Server.HK<\/a>\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3MongoDB\u7684\u8b80\u53d6\u504f\u597d\u8a2d\u5b9a\uff0c\u512a\u5316\u6578\u64da\u8b80\u53d6\u6548\u7387\uff0c\u63d0\u5347\u61c9\u7528\u6027\u80fd\uff0c\u78ba\u4fdd\u6578\u64da\u4e00\u81f4\u6027\u8207\u53ef\u7528\u6027\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-63708","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/63708","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=63708"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/63708\/revisions"}],"predecessor-version":[{"id":63709,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/63708\/revisions\/63709"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=63708"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=63708"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=63708"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}