{"id":21540,"date":"2024-01-02T11:09:24","date_gmt":"2024-01-02T11:09:24","guid":{"rendered":"https:\/\/server.hk\/blog\/21540\/"},"modified":"2024-11-14T10:31:03","modified_gmt":"2024-11-14T02:31:03","slug":"mongodb-glossary-capped-collection","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/21540\/","title":{"rendered":"MongoDB\u8a5e\u5f59\u8868 &#8211; \u6709\u9650\u5bb9\u91cf\u96c6\u5408"},"content":{"rendered":"<h1 id=\"mongodb-glossary-capped-collection-vSqTtVsegu\">MongoDB\u8a5e\u5f59\u8868 &#8211; \u6709\u9650\u5bb9\u91cf\u96c6\u5408<\/h1>\n<p>\u5728MongoDB\u7684\u4e16\u754c\u88e1\uff0c\u6709\u9650\u5bb9\u91cf\u96c6\u5408\u662f\u4e00\u7a2e\u5177\u5099\u56fa\u5b9a\u5927\u5c0f\u4e14\u9075\u5faa\u5148\u9032\u5148\u51fa\uff08FIFO\uff09\u6578\u64da\u5b58\u5132\u6a5f\u5236\u7684\u96c6\u5408\u985e\u578b\u3002\u9019\u662fMongoDB\u7684\u4e00\u9805\u7368\u7279\u529f\u80fd\uff0c\u80fd\u5920\u5be6\u73fe\u9ad8\u6548\u7684\u6578\u64da\u63d2\u5165\u548c\u6aa2\u7d22\u64cd\u4f5c\u3002<\/p>\n<h2 id=\"understanding-capped-collections-vSqTtVsegu\">\u7406\u89e3\u6709\u9650\u5bb9\u91cf\u96c6\u5408<\/h2>\n<p>\u6709\u9650\u5bb9\u91cf\u96c6\u5408\u7684\u5275\u5efa\u662f\u6839\u64da\u7279\u5b9a\u7684\u6700\u5927\u5927\u5c0f\u4f86\u9032\u884c\u7684\uff0c\u9019\u5927\u5c0f\u4ee5\u4f4d\u5143\u7d44\uff08bytes\uff09\u70ba\u55ae\u4f4d\u3002\u4e00\u65e6\u96c6\u5408\u9054\u5230\u5176\u6700\u5927\u5927\u5c0f\uff0c\u4efb\u4f55\u65b0\u63d2\u5165\u5230\u96c6\u5408\u4e2d\u7684\u6587\u6a94\u5c07\u6703\u53d6\u4ee3\u6700\u820a\u7684\u6587\u6a94\uff0c\u5f9e\u800c\u4fdd\u6301\u56fa\u5b9a\u5927\u5c0f\u3002\u9019\u7a2e\u7279\u6027\u4f7f\u5f97\u6709\u9650\u5bb9\u91cf\u96c6\u5408\u5341\u5206\u9069\u5408\u5728\u9700\u8981\u5b58\u5132\u56fa\u5b9a\u6578\u91cf\u6587\u6a94\u6216\u7dad\u6301\u6efe\u52d5\u6578\u64da\u7a97\u53e3\u7684\u5834\u666f\u3002<\/p>\n<p>\u4e0d\u540c\u65bcMongoDB\u4e2d\u7684\u666e\u901a\u96c6\u5408\uff0c\u6709\u9650\u5bb9\u91cf\u96c6\u5408\u5177\u6709\u6839\u64da\u63d2\u5165\u6642\u9593\u800c\u5b9a\u7fa9\u7684\u9810\u8a2d\u9806\u5e8f\u3002\u9019\u7a2e\u9806\u5e8f\u662f\u7531\u4e00\u500b\u7a31\u70ba\u300c\u81ea\u7136\u9806\u5e8f\u300d\u5b57\u6bb5\u7684\u7279\u6b8a\u5b57\u6bb5\u7dad\u8b77\uff0c\u8a72\u5b57\u6bb5\u6703\u81ea\u52d5\u6dfb\u52a0\u81f3\u6bcf\u500b\u6709\u9650\u5bb9\u91cf\u96c6\u5408\u7684\u6587\u6a94\u4e2d\u3002\u81ea\u7136\u9806\u5e8f\u5b57\u6bb5\u78ba\u4fdd\u4e86\u6587\u6a94\u6309\u7167\u5176\u63d2\u5165\u7684\u9806\u5e8f\u88ab\u6aa2\u7d22\u3002<\/p>\n<h2 id=\"benefits-of-capped-collections-vSqTtVsegu\">\u6709\u9650\u5bb9\u91cf\u96c6\u5408\u7684\u512a\u9ede<\/h2>\n<p>\u5728\u67d0\u4e9b\u4f7f\u7528\u6848\u4f8b\u4e2d\uff0c\u6709\u9650\u5bb9\u91cf\u96c6\u5408\u63d0\u4f9b\u4e86\u5e7e\u500b\u512a\u52e2\uff1a<\/p>\n<ul>\n<li><strong>\u9ad8\u6548\u7684\u6578\u64da\u63d2\u5165\uff1a<\/strong>\u7531\u65bc\u6709\u9650\u5bb9\u91cf\u96c6\u5408\u64c1\u6709\u56fa\u5b9a\u5927\u5c0f\u4e26\u4fdd\u6301\u63d2\u5165\u9806\u5e8f\uff0cMongoDB\u80fd\u5920\u512a\u5316\u6578\u64da\u5b58\u5132\u548c\u6aa2\u7d22\u64cd\u4f5c\u3002\u9019\u4f7f\u5f97\u6709\u9650\u5bb9\u91cf\u96c6\u5408\u9069\u5408\u9700\u8981\u9ad8\u901f\u6578\u64da\u651d\u53d6\u7684\u5834\u666f\uff0c\u4f8b\u5982\u65e5\u8a8c\u8a18\u9304\u6216\u5be6\u6642\u6578\u64da\u6d41\u3002<\/li>\n<li><strong>\u81ea\u52d5\u6578\u64da\u904e\u671f\uff1a<\/strong>\u901a\u904e\u5c07\u6709\u9650\u5bb9\u91cf\u96c6\u5408\u8207\u5b58\u6d3b\u6642\u9593\uff08TTL\uff09\u7d22\u5f15\u7684\u6982\u5ff5\u76f8\u7d50\u5408\uff0c\u60a8\u53ef\u4ee5\u81ea\u52d5\u5728\u4e00\u5b9a\u6642\u9593\u5f8c\u4f7f\u6587\u6a94\u904e\u671f\u3002\u9019\u4e00\u529f\u80fd\u9069\u5408\u65bc\u5b58\u5132\u81e8\u6642\u6578\u64da\u6216\u7dad\u8b77\u6642\u9593\u9650\u5236\u7684\u8a18\u9304\u3002<\/li>\n<li><strong>\u6709\u6548\u7684\u7a7a\u9593\u5229\u7528\uff1a<\/strong>\u6709\u9650\u5bb9\u91cf\u96c6\u5408\u4e8b\u5148\u5206\u914d\u56fa\u5b9a\u7684\u7a7a\u9593\uff0c\u9019\u6d88\u9664\u4e86\u983b\u7e41\u78c1\u789f\u5206\u914d\u7684\u9700\u6c42\uff0c\u4e26\u6e1b\u5c11\u4e86\u788e\u7247\u5316\u3002\u9019\u5c0e\u81f4\u4e86\u66f4\u6709\u6548\u7684\u7a7a\u9593\u5229\u7528\u548c\u6027\u80fd\u63d0\u5347\u3002<\/li>\n<\/ul>\n<h2 id=\"creating-and-managing-capped-collections-vSqTtVsegu\">\u5275\u5efa\u548c\u7ba1\u7406\u6709\u9650\u5bb9\u91cf\u96c6\u5408<\/h2>\n<p>\u8981\u5728MongoDB\u4e2d\u5275\u5efa\u6709\u9650\u5bb9\u91cf\u96c6\u5408\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528 <code>db.createCollection()<\/code> \u65b9\u6cd5\uff0c\u4e26\u5c07 <code>capped<\/code> \u9078\u9805\u8a2d\u7f6e\u70ba <code>true<\/code>\u3002\u53e6\u5916\uff0c\u60a8\u9084\u9700\u8981\u6307\u5b9a <code>size<\/code> \u9078\u9805\u4ee5\u5b9a\u7fa9\u96c6\u5408\u7684\u6700\u5927\u5927\u5c0f\uff08\u4ee5\u4f4d\u5143\u7d44\u70ba\u55ae\u4f4d\uff09\u3002<\/p>\n<pre><code>db.createCollection(\"myCappedCollection\", { capped: true, size: 1048576 })\r\n<\/code><\/pre>\n<p>\u6b64\u7bc4\u4f8b\u5275\u5efa\u4e86\u4e00\u500b\u540d\u70ba\u300cmyCappedCollection\u300d\u7684\u6709\u9650\u5bb9\u91cf\u96c6\u5408\uff0c\u6700\u5927\u5927\u5c0f\u70ba1MB\uff081048576\u4f4d\u5143\u7d44\uff09\u3002<\/p>\n<p>\u4e00\u65e6\u5275\u5efa\u4e86\u6709\u9650\u5bb9\u91cf\u96c6\u5408\uff0c\u60a8\u7121\u6cd5\u66f4\u6539\u5176\u5927\u5c0f\u3002\u7136\u800c\uff0c\u60a8\u53ef\u4ee5\u4fee\u6539\u5176\u4ed6\u9078\u9805\uff0c\u4f8b\u5982\u96c6\u5408\u4e2d\u5141\u8a31\u7684\u6700\u5927\u6587\u6a94\u6578\u91cf\u6216\u6587\u6a94\u7684\u7d50\u69cb\u3002<\/p>\n<h2 id=\"conclusion-vSqTtVsegu\">\u7d50\u8ad6<\/h2>\n<p>MongoDB\u4e2d\u7684\u6709\u9650\u5bb9\u91cf\u96c6\u5408\u63d0\u4f9b\u4e86\u4e00\u7a2e\u7368\u7279\u7684\u65b9\u6cd5\u4f86\u5b58\u5132\u548c\u7ba1\u7406\u56fa\u5b9a\u5927\u5c0f\u4e14\u9075\u5faa\u5148\u9032\u5148\u51fa\u9806\u5e8f\u7684\u6578\u64da\u3002\u5b83\u5011\u63d0\u4f9b\u9ad8\u6548\u7684\u6578\u64da\u63d2\u5165\u3001\u81ea\u52d5\u6578\u64da\u904e\u671f\u53ca\u6709\u6548\u7684\u7a7a\u9593\u5229\u7528\u3002\u901a\u904e\u7406\u89e3\u6709\u9650\u5bb9\u91cf\u96c6\u5408\u7684\u6982\u5ff5\uff0c\u60a8\u53ef\u4ee5\u5229\u7528\u9019\u4e00\u7279\u6027\u4f86\u512a\u5316\u60a8\u7684MongoDB\u6578\u64da\u5eab\u8a2d\u8a08\uff0c\u4e26\u6539\u5584\u61c9\u7528\u7a0b\u5e8f\u7684\u6027\u80fd\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u6709\u95dcVPS\u4e3b\u6a5f\u7684\u66f4\u591a\u4fe1\u606f\u4ee5\u53ca\u5b83\u5982\u4f55\u60e0\u53ca\u60a8\u7684MongoDB\u90e8\u7f72\uff0c\u8acb\u8003\u616e\u67e5\u770b <a href=\"https:\/\/server.hk\">Server.HK<\/a>\uff0c\u9019\u662f\u4e00\u5bb6\u63d0\u4f9b\u53ef\u9760\u548c\u53ef\u64f4\u5c55\u7684VPS\u4e3b\u6a5f\u89e3\u6c7a\u65b9\u6848\u7684\u9818\u5148\u4f9b\u61c9\u5546\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>MongoDB\u8a5e\u5f59\u8868 &#038;#821&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-21540","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/21540","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"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=21540"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/21540\/revisions"}],"predecessor-version":[{"id":23921,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/21540\/revisions\/23921"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=21540"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=21540"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=21540"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}