{"id":30060,"date":"2022-12-20T18:07:50","date_gmt":"2023-07-27T00:19:11","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e6%8e%a8%e8%8d%90%e4%bd%bf%e7%94%a8cappedcollection\/"},"modified":"2025-08-12T17:20:18","modified_gmt":"2025-08-12T09:20:18","slug":"%e6%8e%a8%e8%8d%90%e4%bd%bf%e7%94%a8cappedcollection","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e6%8e%a8%e8%8d%90%e4%bd%bf%e7%94%a8cappedcollection\/","title":{"rendered":"\u63a8\u8350\u4f7f\u7528CappedCollection"},"content":{"rendered":"<p>\u5728Gunosy\uff0c\u6211\u4eec\u5728\u65e5\u5fd7\u5206\u6790\u548c\u63a8\u8350\u5f15\u64ce\u65b9\u9762\u4f7f\u7528\u4e86MongoDB\u3002<br \/>\n\u4e0d\u4e45\u524d\uff0c\u5728\u4e00\u6b21\u7814\u8ba8\u4f1a\u4e0a\uff0c\u6211\u4eec\u8c08\u5230\u4e86\u4f7f\u7528MongoDB\u7684MapReduce\u8fdb\u884c\u65e5\u5fd7\u5206\u6790\u7684\u60c5\u51b5\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">MongoDB\u306eMapReduce\u3063\u3066\u9045\u304f\u306a\u3044\uff1f<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u30c7\u30fc\u30bf\u91cf\u5897\u3048\u308b\u3068\u30ea\u30bd\u30fc\u30b9\u76f8\u5f53\u4f7f\u308f\u306a\u3044\uff1f<\/ul>\n<p>\u3068\u306e\u30c4\u30c3\u30b3\u30df\u3092\u9802\u304d\u307e\u3057\u305f\u3002<br \/>\n\u6307\u6458\u81ea\u4f53\u306f\u6b63\u3057\u3044\u3068\u601d\u3063\u3066\u3044\u3066\u3001\u30c7\u30fc\u30bf\u5897\u3048\u308b\u3068\u3059\u3050\u8a08\u7b97\u6642\u9593\u3084\u30b5\u30fc\u30d0\u306e\u30ea\u30bd\u30fc\u30b9\u4f7f\u7528\u91cf\u304c\u5927\u5909\u306a\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u4e3a\u4e86\u907f\u514d\u8fd9\u79cd\u60c5\u51b5\uff0c\u5e76\u5b9e\u73b0\u8282\u7ea6\u8fd0\u7528\uff0cGunosy \u5728\u5176\u65e5\u5fd7\u5206\u6790\u9886\u57df\u4f7f\u7528\u4e86Capped Collection\u3002<\/p>\n<h2>Capped Collection\u662f\u4ec0\u4e48\uff1f<\/h2>\n<p>\u3054\u5b58\u77e5\u306e\u65b9\u3082\u591a\u3044\u3068\u601d\u3044\u307e\u3059\u304c\u3001\u5ff5\u306e\u305f\u3081\u672c\u5bb6\u304b\u3089\u5f15\u7528\u3059\u308b\u3068\u3001<\/p>\n<pre class=\"post-pre\"><code>Capped collections are fixed-size collections that support high-throughput operations that insert, retrieve, and delete documents based on insertion order.\r\n<\/code><\/pre>\n<p>\u8981\u306f\u30b5\u30a4\u30ba\u56fa\u5b9a\u3067\u9ad8\u901f\u306b\u4f7f\u3048\u308bcollection\u3060\u3068\u601d\u3063\u3066\u3044\u305f\u3060\u3051\u308c\u3070\u7d50\u69cb\u3067\u3059\u3002<\/p>\n<p>\u4f18\u70b9\/\u957f\u5904<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30b5\u30a4\u30ba\u56fa\u5b9a\u306a\u306e\u3067\u4e0d\u7528\u610f\u306b\u30ea\u30bd\u30fc\u30b9\u3092\u4f7f\u7528\u3057\u904e\u304e\u308b\u3053\u3068\u304c\u306a\u3044<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u5272\u3068\u9ad8\u901f<\/ul>\n<p>\u7f3a\u70b9<\/p>\n<ul class=\"post-ul\">\u5f8c\u304b\u3089cap\u30b5\u30a4\u30ba\u304c\u5909\u66f4\u3057\u3065\u3089\u3044\u3002\uff08\u3067\u304d\u306a\u304f\u3082\u306a\u3044\u3067\u3059\uff09<\/ul>\n<hr \/>\n<p>\u5982\u679c\u4f7f\u7528Capped Collection\uff0c\u60a8\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u547d\u4ee4\u8fdb\u884c\u786e\u8ba4\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"c1\">\/\/ \u65b0\u3057\u304f\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u3092\u4f5c\u308b\u5834\u5408<\/span>\r\n<span class=\"nx\">db<\/span><span class=\"p\">.<\/span><span class=\"nx\">createCollection<\/span><span class=\"p\">(<\/span> <span class=\"dl\">\"<\/span><span class=\"s2\">mycol<\/span><span class=\"dl\">\"<\/span><span class=\"p\">,<\/span> <span class=\"p\">{<\/span> <span class=\"na\">capped<\/span><span class=\"p\">:<\/span> <span class=\"kc\">true<\/span><span class=\"p\">,<\/span> <span class=\"na\">size<\/span><span class=\"p\">:<\/span> <span class=\"mi\">100000<\/span> <span class=\"p\">}<\/span> <span class=\"p\">)<\/span>\r\n\r\n<span class=\"c1\">\/\/ \u3059\u3067\u306b\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u304c\u5b58\u5728\u3059\u308b\u5834\u5408<\/span>\r\n<span class=\"nx\">db<\/span><span class=\"p\">.<\/span><span class=\"nx\">runCommand<\/span><span class=\"p\">({<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">convertToCapped<\/span><span class=\"dl\">\"<\/span><span class=\"p\">:<\/span> <span class=\"dl\">\"<\/span><span class=\"s2\">mycoll<\/span><span class=\"dl\">\"<\/span><span class=\"p\">,<\/span> <span class=\"na\">size<\/span><span class=\"p\">:<\/span> <span class=\"mi\">100000<\/span><span class=\"p\">});<\/span>\r\n<\/code><\/pre>\n<p>\u901a\u8fc7\u67e5\u770b\u96c6\u5408\u7684\u7edf\u8ba1\u6570\u636e\uff0c\u53ef\u4ee5\u786e\u8ba4\u662f\u5426\u5df2\u8fbe\u5230\u4e0a\u9650\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"o\">&gt;<\/span> <span class=\"nx\">db<\/span><span class=\"p\">.<\/span><span class=\"nx\">mycol<\/span><span class=\"p\">.<\/span><span class=\"nx\">stats<\/span><span class=\"p\">()<\/span>\r\n<span class=\"p\">{<\/span>\r\n    <span class=\"dl\">\"<\/span><span class=\"s2\">ns<\/span><span class=\"dl\">\"<\/span> <span class=\"p\">:<\/span> <span class=\"dl\">\"<\/span><span class=\"s2\">test.mycol<\/span><span class=\"dl\">\"<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"dl\">\"<\/span><span class=\"s2\">count<\/span><span class=\"dl\">\"<\/span> <span class=\"p\">:<\/span> <span class=\"mi\">0<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"dl\">\"<\/span><span class=\"s2\">size<\/span><span class=\"dl\">\"<\/span> <span class=\"p\">:<\/span> <span class=\"mi\">0<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"dl\">\"<\/span><span class=\"s2\">storageSize<\/span><span class=\"dl\">\"<\/span> <span class=\"p\">:<\/span> <span class=\"mi\">12288<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"dl\">\"<\/span><span class=\"s2\">numExtents<\/span><span class=\"dl\">\"<\/span> <span class=\"p\">:<\/span> <span class=\"mi\">1<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"dl\">\"<\/span><span class=\"s2\">nindexes<\/span><span class=\"dl\">\"<\/span> <span class=\"p\">:<\/span> <span class=\"mi\">1<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"dl\">\"<\/span><span class=\"s2\">lastExtentSize<\/span><span class=\"dl\">\"<\/span> <span class=\"p\">:<\/span> <span class=\"mi\">12288<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"dl\">\"<\/span><span class=\"s2\">paddingFactor<\/span><span class=\"dl\">\"<\/span> <span class=\"p\">:<\/span> <span class=\"mi\">1<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"dl\">\"<\/span><span class=\"s2\">systemFlags<\/span><span class=\"dl\">\"<\/span> <span class=\"p\">:<\/span> <span class=\"mi\">1<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"dl\">\"<\/span><span class=\"s2\">userFlags<\/span><span class=\"dl\">\"<\/span> <span class=\"p\">:<\/span> <span class=\"mi\">0<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"dl\">\"<\/span><span class=\"s2\">totalIndexSize<\/span><span class=\"dl\">\"<\/span> <span class=\"p\">:<\/span> <span class=\"mi\">8176<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"dl\">\"<\/span><span class=\"s2\">indexSizes<\/span><span class=\"dl\">\"<\/span> <span class=\"p\">:<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"dl\">\"<\/span><span class=\"s2\">_id_<\/span><span class=\"dl\">\"<\/span> <span class=\"p\">:<\/span> <span class=\"mi\">8176<\/span>\r\n    <span class=\"p\">},<\/span>\r\n    <span class=\"dl\">\"<\/span><span class=\"s2\">capped<\/span><span class=\"dl\">\"<\/span> <span class=\"p\">:<\/span> <span class=\"kc\">true<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"dl\">\"<\/span><span class=\"s2\">max<\/span><span class=\"dl\">\"<\/span> <span class=\"p\">:<\/span> <span class=\"nx\">NumberLong<\/span><span class=\"p\">(<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">9223372036854775807<\/span><span class=\"dl\">\"<\/span><span class=\"p\">),<\/span>\r\n    <span class=\"dl\">\"<\/span><span class=\"s2\">ok<\/span><span class=\"dl\">\"<\/span> <span class=\"p\">:<\/span> <span class=\"mi\">1<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<h2>\u4f60\u662f\u600e\u4e48\u4f7f\u7528\u7684\uff1f<\/h2>\n<p>\u5728\u65e5\u5fd7\u5206\u6790\u90e8\u5206\uff0c\u6211\u4eec\u9700\u8981\u6ce8\u610f\u4ee5\u4e0b\u4e24\u70b9\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u89e3\u6790\u9805\u76ee\u306b\u5408\u308f\u305b\u3066\u30ed\u30b0\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3092\u6bce\u5ea6\u7528\u610f\u3057\u3066\u3044\u308b<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u8a08\u6e2c\u306b\u5fc5\u8981\u306a\u30ed\u30b0\u306e\u4fdd\u5b58\u65e5\u6570\u306b\u5408\u308f\u305b\u3066Cap\u30b5\u30a4\u30ba\u3092\u6c7a\u5b9a\u3057\u3066\u3044\u308b\u3002<\/ul>\n<p>\u5728\u89e3\u6790\u4e2d\uff0c\u51e0\u4e4e\u4e0d\u4f7f\u7528\u539f\u59cb\u8bbf\u95ee\u65e5\u5fd7\u3002<br \/>\n\u7531\u4e8e\u65e5\u5fd7\u89e3\u6790\u548c\u670d\u52a1\u5668\u4ee3\u7801\u7531\u540c\u4e00\u4eba\u8d1f\u8d23\uff0c\u56e0\u6b64\u6211\u4eec\u6839\u636e\u89e3\u6790\u9879\u9002\u65f6\u5b9e\u73b0\u4e86\u4ec5\u53d1\u9001\u5fc5\u8981\u7684\u6700\u5c0f\u6570\u636e\u7684\u8bb0\u5f55\u5668\uff0c\u5e76\u540c\u65f6\u51c6\u5907\u4e86\u7528\u4e8e\u65e5\u5fd7\u6c47\u603b\u7684\u811a\u672c\uff08\u4f7f\u7528Fluentd\uff09\u3002<\/p>\n<p>\u7531\u4e8e\u8bbf\u95ee\u65e5\u5fd7\u4e2d\u4e0d\u53ef\u907f\u514d\u5730\u5305\u542b\u8def\u5f84\u548c\u8bf7\u6c42\u53c2\u6570\u7b49\u5185\u5bb9\uff0c\u6240\u4ee5\u96c6\u5408\u7684\u5927\u5c0f\u4f1a\u53d8\u5f97\u5f88\u5927\u3002\u4f46\u662f\uff0c\u5982\u679c\u53ea\u5c06\u4e0e\u5206\u6790\u9879\u76ee\u771f\u6b63\u5fc5\u8981\u7684\u6570\u636e\u4fdd\u5b58\u5230MongoDB\u4e2d\uff0c\u90a3\u4e48\u5b83\u4e0d\u4f1a\u5360\u7528\u592a\u591a\u7684\u5bb9\u91cf\u3002<\/p>\n<p>\u987a\u4fbf\u63d0\u4e00\u4e0b\uff0c\u539f\u59cb\u7684\u8bbf\u95ee\u65e5\u5fd7\u4e5f\u4f1a\u6682\u65f6\u4fdd\u5b58\u5728MongoDB\u4e2d\uff0c\u4f46\u5927\u90e8\u5206\u4f1a\u5148\u4fdd\u5b58\u5230S3\uff0c\u7136\u540e\u6d41\u5411Redshift\u3002<\/p>\n<p>\u4ece\u76ee\u524d\u6765\u770b\uff0c\u8fd9\u79cd\u8fd0\u4f5c\u65b9\u5f0f\u4f7f\u5f97\u5206\u6790\u672c\u8eab\u5e76\u4e0d\u9700\u8981\u592a\u5927\u7684\u8d44\u6e90\uff0c\u4f46\u4ecd\u80fd\u7ef4\u6301\u4e0b\u53bb\u3002<\/p>\n<h2>\u8fd9\u79cd\u8fd0\u8425\u65b9\u5f0f\u7684\u7f3a\u70b9<\/h2>\n<p>\u5f53\u9700\u8981\u5bf9\u957f\u671f\u6570\u636e\u8fdb\u884c\u540e\u671f\u5206\u6790\u65f6\uff0c\u7531\u4e8eCollection\u5185\u65e0\u6cd5\u4fdd\u5b58\u5982\u6b64\u957f\u671f\u7684\u6570\u636e\uff0c\u56e0\u6b64\u6211\u4eec\u5728\u5185\u90e8\u4f7f\u7528RedShift\u8fdb\u884c\u5b58\u50a8\u3002<\/p>\n<h2>\u603b\u7ed3<\/h2>\n<p>\u4f7f\u7528Capped Collection\uff0c\u5373\u4f7f\u5728\u76f8\u5bf9\u8f83\u5927\u7684\u89c4\u6a21\u4e0b\uff0c\u4e5f\u80fd\u5728\u7ef4\u6301MongoDB\u6027\u80fd\u7684\u540c\u65f6\u8282\u7ea6\u8d44\u6e90\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728Gunosy\uff0c\u6211\u4eec\u5728\u65e5\u5fd7\u5206\u6790\u548c\u63a8\u8350\u5f15\u64ce\u65b9\u9762\u4f7f\u7528\u4e86MongoDB\u3002 \u4e0d\u4e45\u524d\uff0c\u5728\u4e00\u6b21\u7814\u8ba8\u4f1a\u4e0a\uff0c\u6211\u4eec\u8c08\u5230\u4e86\u4f7f\u7528Mo [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[227],"class_list":["post-30060","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-227"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u63a8\u8350\u4f7f\u7528CappedCollection - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"\u5173\u4e8e\u63a8\u8350\u4f7f\u7528CappedCollection\u7684\u6280\u672f\u6587\u7ae0\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/\u63a8\u8350\u4f7f\u7528cappedcollection\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u63a8\u8350\u4f7f\u7528CappedCollection\" \/>\n<meta property=\"og:description\" content=\"\u5173\u4e8e\u63a8\u8350\u4f7f\u7528CappedCollection\u7684\u6280\u672f\u6587\u7ae0\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/\u63a8\u8350\u4f7f\u7528cappedcollection\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta 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