{"id":7277,"date":"2022-09-06T10:30:01","date_gmt":"2022-09-06T02:30:01","guid":{"rendered":"http:\/\/123.57.164.21\/?p=7277"},"modified":"2022-09-06T10:30:01","modified_gmt":"2022-09-06T02:30:01","slug":"mongodb-%e6%a6%82%e5%bf%b5%e8%a7%a3%e6%9e%90","status":"publish","type":"post","link":"https:\/\/92it.top\/?p=7277","title":{"rendered":"MongoDB \u6982\u5ff5\u89e3\u6790"},"content":{"rendered":"\n

\u4e0d\u7ba1\u6211\u4eec\u5b66\u4e60\u4ec0\u4e48\u6570\u636e\u5e93\u90fd\u5e94\u8be5\u5b66\u4e60\u5176\u4e2d\u7684\u57fa\u7840\u6982\u5ff5\uff0c\u5728mongodb\u4e2d\u57fa\u672c\u7684\u6982\u5ff5\u662f\u6587\u6863\u3001\u96c6\u5408\u3001\u6570\u636e\u5e93\uff0c\u4e0b\u9762\u6211\u4eec\u6328\u4e2a\u4ecb\u7ecd\u3002<\/p>\n\n\n\n

\u4e0b\u8868\u5c06\u5e2e\u52a9\u60a8\u66f4\u5bb9\u6613\u7406\u89e3Mongo\u4e2d\u7684\u4e00\u4e9b\u6982\u5ff5\uff1a<\/p>\n\n\n\n

\"\"<\/figure><\/div>\n\n\n\n

\u901a\u8fc7\u4e0b\u56fe\u5b9e\u4f8b\uff0c\u6211\u4eec\u4e5f\u53ef\u4ee5\u66f4\u76f4\u89c2\u7684\u4e86\u89e3Mongo\u4e2d\u7684\u4e00\u4e9b\u6982\u5ff5\uff1a<\/p>\n\n\n\n

\"\"<\/figure><\/div>\n\n\n\n

\u6570\u636e\u5e93<\/strong><\/p>\n\n\n\n

\n\n\n\n

\u4e00\u4e2amongodb\u4e2d\u53ef\u4ee5\u5efa\u7acb\u591a\u4e2a\u6570\u636e\u5e93\u3002<\/p>\n\n\n\n

MongoDB\u7684\u9ed8\u8ba4\u6570\u636e\u5e93\u4e3a”db”\uff0c\u8be5\u6570\u636e\u5e93\u5b58\u50a8\u5728data\u76ee\u5f55\u4e2d\u3002<\/p>\n\n\n\n

MongoDB\u7684\u5355\u4e2a\u5b9e\u4f8b\u53ef\u4ee5\u5bb9\u7eb3\u591a\u4e2a\u72ec\u7acb\u7684\u6570\u636e\u5e93\uff0c\u6bcf\u4e00\u4e2a\u90fd\u6709\u81ea\u5df1\u7684\u96c6\u5408\u548c\u6743\u9650\uff0c\u4e0d\u540c\u7684\u6570\u636e\u5e93\u4e5f\u653e\u7f6e\u5728\u4e0d\u540c\u7684\u6587\u4ef6\u4e2d\u3002<\/p>\n\n\n\n

“show dbs”<\/strong> \u547d\u4ee4\u53ef\u4ee5\u663e\u793a\u6240\u6709\u6570\u636e\u7684\u5217\u8868\u3002<\/p>\n\n\n\n

$ .\/mongo\nMongoDB shell version: 3.0.6\nconnecting to: test\n> show dbs\nlocal  0.078GB\ntest   0.078GB\n> <\/pre>\n\n\n\n
\u6267\u884c “db”<\/strong> \u547d\u4ee4\u53ef\u4ee5\u663e\u793a\u5f53\u524d\u6570\u636e\u5e93\u5bf9\u8c61\u6216\u96c6\u5408\u3002<\/p>\n\n\n\n
$ .\/mongo\nMongoDB shell version: 3.0.6\nconnecting to: test\n> db\ntest\n> <\/pre>\n\n\n\n
\u8fd0\u884c”use”\u547d\u4ee4\uff0c\u53ef\u4ee5\u8fde\u63a5\u5230\u4e00\u4e2a\u6307\u5b9a\u7684\u6570\u636e\u5e93\u3002<\/p>\n\n\n\n
> use local\nswitched to db local\n> db\nlocal\n> <\/pre>\n\n\n\n
\u4ee5\u4e0a\u5b9e\u4f8b\u547d\u4ee4\u4e2d\uff0c”local” \u662f\u4f60\u8981\u94fe\u63a5\u7684\u6570\u636e\u5e93\u3002<\/p>\n\n\n\n
\u5728\u4e0b\u4e00\u4e2a\u7ae0\u8282\u6211\u4eec\u5c06\u8be6\u7ec6\u8bb2\u89e3MongoDB\u4e2d\u547d\u4ee4\u7684\u4f7f\u7528\u3002<\/p>\n\n\n\n
\u6570\u636e\u5e93\u4e5f\u901a\u8fc7\u540d\u5b57\u6765\u6807\u8bc6\u3002\u6570\u636e\u5e93\u540d\u53ef\u4ee5\u662f\u6ee1\u8db3\u4ee5\u4e0b\u6761\u4ef6\u7684\u4efb\u610fUTF-8\u5b57\u7b26\u4e32\u3002<\/p>\n\n\n\n
  • \u4e0d\u80fd\u662f\u7a7a\u5b57\u7b26\u4e32\uff08””)\u3002<\/li>
  • \u4e0d\u5f97\u542b\u6709’ ‘\uff08\u7a7a\u683c)\u3001.\u3001$\u3001\/\u3001\\\u548c\\0 (\u7a7a\u5b57\u7b26)\u3002<\/li>
  • \u5e94\u5168\u90e8\u5c0f\u5199\u3002<\/li>
  • \u6700\u591a64\u5b57\u8282\u3002<\/li><\/ul>\n\n\n\n
    \u6709\u4e00\u4e9b\u6570\u636e\u5e93\u540d\u662f\u4fdd\u7559\u7684\uff0c\u53ef\u4ee5\u76f4\u63a5\u8bbf\u95ee\u8fd9\u4e9b\u6709\u7279\u6b8a\u4f5c\u7528\u7684\u6570\u636e\u5e93\u3002<\/p>\n\n\n\n
    • admin<\/strong>\uff1a \u4ece\u6743\u9650\u7684\u89d2\u5ea6\u6765\u770b\uff0c\u8fd9\u662f”root”\u6570\u636e\u5e93\u3002\u8981\u662f\u5c06\u4e00\u4e2a\u7528\u6237\u6dfb\u52a0\u5230\u8fd9\u4e2a\u6570\u636e\u5e93\uff0c\u8fd9\u4e2a\u7528\u6237\u81ea\u52a8\u7ee7\u627f\u6240\u6709\u6570\u636e\u5e93\u7684\u6743\u9650\u3002\u4e00\u4e9b\u7279\u5b9a\u7684\u670d\u52a1\u5668\u7aef\u547d\u4ee4\u4e5f\u53ea\u80fd\u4ece\u8fd9\u4e2a\u6570\u636e\u5e93\u8fd0\u884c\uff0c\u6bd4\u5982\u5217\u51fa\u6240\u6709\u7684\u6570\u636e\u5e93\u6216\u8005\u5173\u95ed\u670d\u52a1\u5668\u3002<\/li>
    • local:<\/strong> \u8fd9\u4e2a\u6570\u636e\u6c38\u8fdc\u4e0d\u4f1a\u88ab\u590d\u5236\uff0c\u53ef\u4ee5\u7528\u6765\u5b58\u50a8\u9650\u4e8e\u672c\u5730\u5355\u53f0\u670d\u52a1\u5668\u7684\u4efb\u610f\u96c6\u5408<\/li>
    • config<\/strong>: \u5f53Mongo\u7528\u4e8e\u5206\u7247\u8bbe\u7f6e\u65f6\uff0cconfig\u6570\u636e\u5e93\u5728\u5185\u90e8\u4f7f\u7528\uff0c\u7528\u4e8e\u4fdd\u5b58\u5206\u7247\u7684\u76f8\u5173\u4fe1\u606f\u3002<\/li><\/ul>\n\n\n\n
      \u6587\u6863(Document)<\/strong><\/p>\n\n\n\n
      \n\n\n\n
      \u6587\u6863\u662f\u4e00\u7ec4\u952e\u503c(key-value)\u5bf9(\u5373 BSON)\u3002MongoDB \u7684\u6587\u6863\u4e0d\u9700\u8981\u8bbe\u7f6e\u76f8\u540c\u7684\u5b57\u6bb5\uff0c\u5e76\u4e14\u76f8\u540c\u7684\u5b57\u6bb5\u4e0d\u9700\u8981\u76f8\u540c\u7684\u6570\u636e\u7c7b\u578b\uff0c\u8fd9\u4e0e\u5173\u7cfb\u578b\u6570\u636e\u5e93\u6709\u5f88\u5927\u7684\u533a\u522b\uff0c\u4e5f\u662f MongoDB \u975e\u5e38\u7a81\u51fa\u7684\u7279\u70b9\u3002<\/p>\n\n\n\n
      \u4e00\u4e2a\u7b80\u5355\u7684\u6587\u6863\u4f8b\u5b50\u5982\u4e0b\uff1a<\/p>\n\n\n\n
      {\"site\":\"www.runoob.com\", \"name\":\"\u83dc\u9e1f\u6559\u7a0b\"}<\/pre>\n\n\n\n
      \u4e0b\u8868\u5217\u51fa\u4e86 RDBMS \u4e0e MongoDB \u5bf9\u5e94\u7684\u672f\u8bed\uff1a<\/p>\n\n\n\n
      \"\"<\/figure><\/div>\n\n\n\n
      \u9700\u8981\u6ce8\u610f\u7684\u662f\uff1a<\/p>\n\n\n\n
      1. \u6587\u6863\u4e2d\u7684\u952e\/\u503c\u5bf9\u662f\u6709\u5e8f\u7684\u3002<\/li>
      2. \u6587\u6863\u4e2d\u7684\u503c\u4e0d\u4ec5\u53ef\u4ee5\u662f\u5728\u53cc\u5f15\u53f7\u91cc\u9762\u7684\u5b57\u7b26\u4e32\uff0c\u8fd8\u53ef\u4ee5\u662f\u5176\u4ed6\u51e0\u79cd\u6570\u636e\u7c7b\u578b\uff08\u751a\u81f3\u53ef\u4ee5\u662f\u6574\u4e2a\u5d4c\u5165\u7684\u6587\u6863)\u3002<\/li>
      3. MongoDB\u533a\u5206\u7c7b\u578b\u548c\u5927\u5c0f\u5199\u3002<\/li>
      4. MongoDB\u7684\u6587\u6863\u4e0d\u80fd\u6709\u91cd\u590d\u7684\u952e\u3002<\/li>
      5. \u6587\u6863\u7684\u952e\u662f\u5b57\u7b26\u4e32\u3002\u9664\u4e86\u5c11\u6570\u4f8b\u5916\u60c5\u51b5\uff0c\u952e\u53ef\u4ee5\u4f7f\u7528\u4efb\u610fUTF-8\u5b57\u7b26\u3002<\/li><\/ol>\n\n\n\n
        \u6587\u6863\u952e\u547d\u540d\u89c4\u8303\uff1a<\/p>\n\n\n\n
        • \u952e\u4e0d\u80fd\u542b\u6709\\0 (\u7a7a\u5b57\u7b26)\u3002\u8fd9\u4e2a\u5b57\u7b26\u7528\u6765\u8868\u793a\u952e\u7684\u7ed3\u5c3e\u3002<\/li>
        • .\u548c$\u6709\u7279\u522b\u7684\u610f\u4e49\uff0c\u53ea\u6709\u5728\u7279\u5b9a\u73af\u5883\u4e0b\u624d\u80fd\u4f7f\u7528\u3002<\/li>
        • \u4ee5\u4e0b\u5212\u7ebf”_”\u5f00\u5934\u7684\u952e\u662f\u4fdd\u7559\u7684(\u4e0d\u662f\u4e25\u683c\u8981\u6c42\u7684)\u3002<\/li><\/ul>\n\n\n\n
          \u96c6\u5408<\/strong><\/p>\n\n\n\n
          \n\n\n\n
          \u96c6\u5408\u5c31\u662f MongoDB \u6587\u6863\u7ec4\uff0c\u7c7b\u4f3c\u4e8e RDBMS \uff08\u5173\u7cfb\u6570\u636e\u5e93\u7ba1\u7406\u7cfb\u7edf\uff1aRelational Database Management System)\u4e2d\u7684\u8868\u683c\u3002<\/p>\n\n\n\n
          \u96c6\u5408\u5b58\u5728\u4e8e\u6570\u636e\u5e93\u4e2d\uff0c\u96c6\u5408\u6ca1\u6709\u56fa\u5b9a\u7684\u7ed3\u6784\uff0c\u8fd9\u610f\u5473\u7740\u4f60\u5728\u5bf9\u96c6\u5408\u53ef\u4ee5\u63d2\u5165\u4e0d\u540c\u683c\u5f0f\u548c\u7c7b\u578b\u7684\u6570\u636e\uff0c\u4f46\u901a\u5e38\u60c5\u51b5\u4e0b\u6211\u4eec\u63d2\u5165\u96c6\u5408\u7684\u6570\u636e\u90fd\u4f1a\u6709\u4e00\u5b9a\u7684\u5173\u8054\u6027\u3002<\/p>\n\n\n\n
          \u6bd4\u5982\uff0c\u6211\u4eec\u53ef\u4ee5\u5c06\u4ee5\u4e0b\u4e0d\u540c\u6570\u636e\u7ed3\u6784\u7684\u6587\u6863\u63d2\u5165\u5230\u96c6\u5408\u4e2d\uff1a<\/p>\n\n\n\n
          {\"site\":\"www.baidu.com\"}\n{\"site\":\"www.google.com\",\"name\":\"Google\"}\n{\"site\":\"www.runoob.com\",\"name\":\"\u83dc\u9e1f\u6559\u7a0b\",\"num\":5}<\/pre>\n\n\n\n
          \u5f53\u7b2c\u4e00\u4e2a\u6587\u6863\u63d2\u5165\u65f6\uff0c\u96c6\u5408\u5c31\u4f1a\u88ab\u521b\u5efa\u3002<\/p>\n\n\n\n
          \u5408\u6cd5\u7684\u96c6\u5408\u540d<\/strong><\/p>\n\n\n\n
          • \u96c6\u5408\u540d\u4e0d\u80fd\u662f\u7a7a\u5b57\u7b26\u4e32””\u3002<\/li>
          • \u96c6\u5408\u540d\u4e0d\u80fd\u542b\u6709\\0\u5b57\u7b26\uff08\u7a7a\u5b57\u7b26)\uff0c\u8fd9\u4e2a\u5b57\u7b26\u8868\u793a\u96c6\u5408\u540d\u7684\u7ed3\u5c3e\u3002<\/li>
          • \u96c6\u5408\u540d\u4e0d\u80fd\u4ee5”system.”\u5f00\u5934\uff0c\u8fd9\u662f\u4e3a\u7cfb\u7edf\u96c6\u5408\u4fdd\u7559\u7684\u524d\u7f00\u3002<\/li>
          • \u7528\u6237\u521b\u5efa\u7684\u96c6\u5408\u540d\u5b57\u4e0d\u80fd\u542b\u6709\u4fdd\u7559\u5b57\u7b26\u3002\u6709\u4e9b\u9a71\u52a8\u7a0b\u5e8f\u7684\u786e\u652f\u6301\u5728\u96c6\u5408\u540d\u91cc\u9762\u5305\u542b\uff0c\u8fd9\u662f\u56e0\u4e3a\u67d0\u4e9b\u7cfb\u7edf\u751f\u6210\u7684\u96c6\u5408\u4e2d\u5305\u542b\u8be5\u5b57\u7b26\u3002\u9664\u975e\u4f60\u8981\u8bbf\u95ee\u8fd9\u79cd\u7cfb\u7edf\u521b\u5efa\u7684\u96c6\u5408\uff0c\u5426\u5219\u5343\u4e07\u4e0d\u8981\u5728\u540d\u5b57\u91cc\u51fa\u73b0$\u3002\u3000<\/li><\/ul>\n\n\n\n
            \u5982\u4e0b\u5b9e\u4f8b\uff1a<\/p>\n\n\n\n
            db.col.findOne()<\/pre>\n\n\n\n
            capped collections<\/strong><\/p>\n\n\n\n
            Capped collections \u5c31\u662f\u56fa\u5b9a\u5927\u5c0f\u7684collection\u3002<\/p>\n\n\n\n
            \u5b83\u6709\u5f88\u9ad8\u7684\u6027\u80fd\u4ee5\u53ca\u961f\u5217\u8fc7\u671f\u7684\u7279\u6027(\u8fc7\u671f\u6309\u7167\u63d2\u5165\u7684\u987a\u5e8f). \u6709\u70b9\u548c “RRD” \u6982\u5ff5\u7c7b\u4f3c\u3002<\/p>\n\n\n\n
            Capped collections \u662f\u9ad8\u6027\u80fd\u81ea\u52a8\u7684\u7ef4\u62a4\u5bf9\u8c61\u7684\u63d2\u5165\u987a\u5e8f\u3002\u5b83\u975e\u5e38\u9002\u5408\u7c7b\u4f3c\u8bb0\u5f55\u65e5\u5fd7\u7684\u529f\u80fd\u548c\u6807\u51c6\u7684 collection \u4e0d\u540c\uff0c\u4f60\u5fc5\u987b\u8981\u663e\u5f0f\u7684\u521b\u5efa\u4e00\u4e2acapped collection\uff0c\u6307\u5b9a\u4e00\u4e2a collection \u7684\u5927\u5c0f\uff0c\u5355\u4f4d\u662f\u5b57\u8282\u3002collection \u7684\u6570\u636e\u5b58\u50a8\u7a7a\u95f4\u503c\u63d0\u524d\u5206\u914d\u7684\u3002<\/p>\n\n\n\n
            Capped collections \u53ef\u4ee5\u6309\u7167\u6587\u6863\u7684\u63d2\u5165\u987a\u5e8f\u4fdd\u5b58\u5230\u96c6\u5408\u4e2d\uff0c\u800c\u4e14\u8fd9\u4e9b\u6587\u6863\u5728\u78c1\u76d8\u4e0a\u5b58\u653e\u4f4d\u7f6e\u4e5f\u662f\u6309\u7167\u63d2\u5165\u987a\u5e8f\u6765\u4fdd\u5b58\u7684\uff0c\u6240\u4ee5\u5f53\u6211\u4eec\u66f4\u65b0Capped collections \u4e2d\u6587\u6863\u7684\u65f6\u5019\uff0c\u66f4\u65b0\u540e\u7684\u6587\u6863\u4e0d\u53ef\u4ee5\u8d85\u8fc7\u4e4b\u524d\u6587\u6863\u7684\u5927\u5c0f\uff0c\u8fd9\u6837\u8bdd\u5c31\u53ef\u4ee5\u786e\u4fdd\u6240\u6709\u6587\u6863\u5728\u78c1\u76d8\u4e0a\u7684\u4f4d\u7f6e\u4e00\u76f4\u4fdd\u6301\u4e0d\u53d8\u3002<\/p>\n\n\n\n
            \u7531\u4e8e Capped collection \u662f\u6309\u7167\u6587\u6863\u7684\u63d2\u5165\u987a\u5e8f\u800c\u4e0d\u662f\u4f7f\u7528\u7d22\u5f15\u786e\u5b9a\u63d2\u5165\u4f4d\u7f6e\uff0c\u8fd9\u6837\u7684\u8bdd\u53ef\u4ee5\u63d0\u9ad8\u589e\u6dfb\u6570\u636e\u7684\u6548\u7387\u3002MongoDB \u7684\u64cd\u4f5c\u65e5\u5fd7\u6587\u4ef6 oplog.rs \u5c31\u662f\u5229\u7528 Capped Collection \u6765\u5b9e\u73b0\u7684\u3002<\/p>\n\n\n\n
            \u8981\u6ce8\u610f\u7684\u662f\u6307\u5b9a\u7684\u5b58\u50a8\u5927\u5c0f\u5305\u542b\u4e86\u6570\u636e\u5e93\u7684\u5934\u4fe1\u606f\u3002<\/p>\n\n\n\n
            db.createCollection(\"mycoll\", {capped:true, size:100000})<\/pre>\n\n\n\n
            • \u5728 capped collection \u4e2d\uff0c\u4f60\u80fd\u6dfb\u52a0\u65b0\u7684\u5bf9\u8c61\u3002<\/li>
            • \u80fd\u8fdb\u884c\u66f4\u65b0\uff0c\u7136\u800c\uff0c\u5bf9\u8c61\u4e0d\u4f1a\u589e\u52a0\u5b58\u50a8\u7a7a\u95f4\u3002\u5982\u679c\u589e\u52a0\uff0c\u66f4\u65b0\u5c31\u4f1a\u5931\u8d25 \u3002<\/li>
            • \u4f7f\u7528 Capped Collection \u4e0d\u80fd\u5220\u9664\u4e00\u4e2a\u6587\u6863\uff0c\u53ef\u4ee5\u4f7f\u7528 drop() \u65b9\u6cd5\u5220\u9664 collection \u6240\u6709\u7684\u884c\u3002<\/li>
            • \u5220\u9664\u4e4b\u540e\uff0c\u4f60\u5fc5\u987b\u663e\u5f0f\u7684\u91cd\u65b0\u521b\u5efa\u8fd9\u4e2a collection\u3002<\/li>
            • \u572832bit\u673a\u5668\u4e2d\uff0ccapped collection \u6700\u5927\u5b58\u50a8\u4e3a 1e9( 1X109<\/sup>)\u4e2a\u5b57\u8282\u3002<\/li><\/ul>\n\n\n\n
              \u5143\u6570\u636e<\/strong><\/p>\n\n\n\n
              \n\n\n\n
              \u6570\u636e\u5e93\u7684\u4fe1\u606f\u662f\u5b58\u50a8\u5728\u96c6\u5408\u4e2d\u3002\u5b83\u4eec\u4f7f\u7528\u4e86\u7cfb\u7edf\u7684\u547d\u540d\u7a7a\u95f4\uff1a<\/p>\n\n\n\n
              dbname.system.*<\/pre>\n\n\n\n
              \u5728MongoDB\u6570\u636e\u5e93\u4e2d\u540d\u5b57\u7a7a\u95f4 <dbname>.system.* \u662f\u5305\u542b\u591a\u79cd\u7cfb\u7edf\u4fe1\u606f\u7684\u7279\u6b8a\u96c6\u5408(Collection)\uff0c\u5982\u4e0b:<\/p>\n\n\n\n
              \"\"<\/figure><\/div>\n\n\n\n
              \u5bf9\u4e8e\u4fee\u6539\u7cfb\u7edf\u96c6\u5408\u4e2d\u7684\u5bf9\u8c61\u6709\u5982\u4e0b\u9650\u5236\u3002<\/p>\n\n\n\n
              \u5728{{system.indexes}}\u63d2\u5165\u6570\u636e\uff0c\u53ef\u4ee5\u521b\u5efa\u7d22\u5f15\u3002\u4f46\u9664\u6b64\u4e4b\u5916\u8be5\u8868\u4fe1\u606f\u662f\u4e0d\u53ef\u53d8\u7684(\u7279\u6b8a\u7684drop index\u547d\u4ee4\u5c06\u81ea\u52a8\u66f4\u65b0\u76f8\u5173\u4fe1\u606f)\u3002<\/p>\n\n\n\n
              {{system.users}}\u662f\u53ef\u4fee\u6539\u7684\u3002 {{system.profile}}\u662f\u53ef\u5220\u9664\u7684\u3002<\/p>\n\n\n\n
              MongoDB \u6570\u636e\u7c7b\u578b<\/strong><\/p>\n\n\n\n
              \n\n\n\n
              \u4e0b\u8868\u4e3aMongoDB\u4e2d\u5e38\u7528\u7684\u51e0\u79cd\u6570\u636e\u7c7b\u578b\u3002<\/p>\n\n\n\n
              \"\"<\/figure><\/div>\n\n\n\n
              \u4e0b\u9762\u8bf4\u660e\u4e0b\u51e0\u79cd\u91cd\u8981\u7684\u6570\u636e\u7c7b\u578b\u3002<\/p>\n\n\n\n
              ObjectId<\/strong><\/p>\n\n\n\n
              ObjectId \u7c7b\u4f3c\u552f\u4e00\u4e3b\u952e\uff0c\u53ef\u4ee5\u5f88\u5feb\u7684\u53bb\u751f\u6210\u548c\u6392\u5e8f\uff0c\u5305\u542b 12 bytes\uff0c\u542b\u4e49\u662f\uff1a<\/p>\n\n\n\n
              • \u524d 4 \u4e2a\u5b57\u8282\u8868\u793a\u521b\u5efa unix<\/strong> \u65f6\u95f4\u6233,\u683c\u6797\u5c3c\u6cbb\u65f6\u95f4 UTC<\/strong> \u65f6\u95f4\uff0c\u6bd4\u5317\u4eac\u65f6\u95f4\u665a\u4e86 8 \u4e2a\u5c0f\u65f6<\/li>
              • \u63a5\u4e0b\u6765\u7684 3 \u4e2a\u5b57\u8282\u662f\u673a\u5668\u6807\u8bc6\u7801<\/li>
              • \u7d27\u63a5\u7684\u4e24\u4e2a\u5b57\u8282\u7531\u8fdb\u7a0b id \u7ec4\u6210 PID<\/li>
              • \u6700\u540e\u4e09\u4e2a\u5b57\u8282\u662f\u968f\u673a\u6570<\/li><\/ul>\n\n\n\n
                \"\"<\/figure><\/div>\n\n\n\n
                MongoDB \u4e2d\u5b58\u50a8\u7684\u6587\u6863\u5fc5\u987b\u6709\u4e00\u4e2a _id \u952e\u3002\u8fd9\u4e2a\u952e\u7684\u503c\u53ef\u4ee5\u662f\u4efb\u4f55\u7c7b\u578b\u7684\uff0c\u9ed8\u8ba4\u662f\u4e2a ObjectId \u5bf9\u8c61<\/p>\n\n\n\n
                \u7531\u4e8e ObjectId \u4e2d\u4fdd\u5b58\u4e86\u521b\u5efa\u7684\u65f6\u95f4\u6233\uff0c\u6240\u4ee5\u4f60\u4e0d\u9700\u8981\u4e3a\u4f60\u7684\u6587\u6863\u4fdd\u5b58\u65f6\u95f4\u6233\u5b57\u6bb5\uff0c\u4f60\u53ef\u4ee5\u901a\u8fc7 getTimestamp \u51fd\u6570\u6765\u83b7\u53d6\u6587\u6863\u7684\u521b\u5efa\u65f6\u95f4:<\/p>\n\n\n\n
                > var newObject = ObjectId()\n> newObject.getTimestamp()\nISODate(\"2017-11-25T07:21:10Z\")<\/pre>\n\n\n\n
                ObjectId \u8f6c\u4e3a\u5b57\u7b26\u4e32<\/p>\n\n\n\n
                > newObject.str\n5a1919e63df83ce79df8b38f<\/pre>\n\n\n\n
                \u5b57\u7b26\u4e32<\/strong>\uff1aBSON \u5b57\u7b26\u4e32\u90fd\u662f UTF-8 \u7f16\u7801\u3002<\/p>\n\n\n\n
                \u65f6\u95f4\u6233<\/strong><\/p>\n\n\n\n
                BSON \u6709\u4e00\u4e2a\u7279\u6b8a\u7684\u65f6\u95f4\u6233\u7c7b\u578b\u7528\u4e8e MongoDB \u5185\u90e8\u4f7f\u7528\uff0c\u4e0e\u666e\u901a\u7684 \u65e5\u671f \u7c7b\u578b\u4e0d\u76f8\u5173\u3002 \u65f6\u95f4\u6233\u503c\u662f\u4e00\u4e2a 64 \u4f4d\u7684\u503c\u3002\u5176\u4e2d\uff1a<\/p>\n\n\n\n
                • \u524d32\u4f4d\u662f\u4e00\u4e2a time_t \u503c\uff08\u4e0eUnix\u65b0\u7eaa\u5143\u76f8\u5dee\u7684\u79d2\u6570\uff09<\/li>
                • \u540e32\u4f4d\u662f\u5728\u67d0\u79d2\u4e2d\u64cd\u4f5c\u7684\u4e00\u4e2a\u9012\u589e\u7684\u5e8f\u6570<\/code><\/li><\/ul>\n\n\n\n
                  \u5728\u5355\u4e2a mongod \u5b9e\u4f8b\u4e2d\uff0c\u65f6\u95f4\u6233\u503c\u901a\u5e38\u662f\u552f\u4e00\u7684\u3002<\/p>\n\n\n\n
                  \u5728\u590d\u5236\u96c6\u4e2d\uff0c oplog \u6709\u4e00\u4e2a ts \u5b57\u6bb5\u3002\u8fd9\u4e2a\u5b57\u6bb5\u4e2d\u7684\u503c\u4f7f\u7528BSON\u65f6\u95f4\u6233\u8868\u793a\u4e86\u64cd\u4f5c\u65f6\u95f4\u3002<\/p>\n\n\n\n
                      BSON \u65f6\u95f4\u6233\u7c7b\u578b\u4e3b\u8981\u7528\u4e8e MongoDB \u5185\u90e8\u4f7f\u7528\u3002\u5728\u5927\u591a\u6570\u60c5\u51b5\u4e0b\u7684\u5e94\u7528\u5f00\u53d1\u4e2d\uff0c\u4f60\u53ef\u4ee5\u4f7f\u7528 BSON \u65e5\u671f\u7c7b\u578b\u3002<\/pre>\n\n\n\n
                  \u65e5\u671f<\/strong><\/p>\n\n\n\n
                  \u8868\u793a\u5f53\u524d\u8ddd\u79bb Unix\u65b0\u7eaa\u5143\uff081970\u5e741\u67081\u65e5\uff09\u7684\u6beb\u79d2\u6570\u3002\u65e5\u671f\u7c7b\u578b\u662f\u6709\u7b26\u53f7\u7684, \u8d1f\u6570\u8868\u793a 1970 \u5e74\u4e4b\u524d\u7684\u65e5\u671f\u3002<\/p>\n\n\n\n
                  > var mydate1 = new Date()     \/\/\u683c\u6797\u5c3c\u6cbb\u65f6\u95f4\n> mydate1\nISODate(\"2018-03-04T14:58:51.233Z\")\n> typeof mydate1\nobject<\/pre>\n\n\n\n
                  > var mydate2 = ISODate() \/\/\u683c\u6797\u5c3c\u6cbb\u65f6\u95f4\n> mydate2\nISODate(\"2018-03-04T15:00:45.479Z\")\n> typeof mydate2\nobject<\/pre>\n\n\n\n
                  \u8fd9\u6837\u521b\u5efa\u7684\u65f6\u95f4\u662f\u65e5\u671f\u7c7b\u578b\uff0c\u53ef\u4ee5\u4f7f\u7528 JS \u4e2d\u7684 Date \u7c7b\u578b\u7684\u65b9\u6cd5\u3002<\/p>\n\n\n\n
                  \u8fd4\u56de\u4e00\u4e2a\u65f6\u95f4\u7c7b\u578b\u7684\u5b57\u7b26\u4e32\uff1a<\/p>\n\n\n\n
                  > var mydate1str = mydate1.toString()\n> mydate1str\nSun Mar 04 2018 14:58:51 GMT+0000 (UTC) \n> typeof mydate1str\nstring<\/pre>\n\n\n\n
                  \u6216\u8005<\/p>\n\n\n\n
                  > Date()\nSun Mar 04 2018 15:02:59 GMT+0000 (UTC)   <\/pre>\n","protected":false},"excerpt":{"rendered":"
                  \u4e0d\u7ba1\u6211\u4eec\u5b66\u4e60\u4ec0\u4e48\u6570\u636e\u5e93\u90fd\u5e94\u8be5\u5b66\u4e60\u5176\u4e2d\u7684\u57fa\u7840\u6982\u5ff5\uff0c\u5728mongodb\u4e2d\u57fa\u672c\u7684\u6982\u5ff5\u662f\u6587\u6863\u3001\u96c6\u5408\u3001\u6570\u636e\u5e93\uff0c\u4e0b\u9762\u6211\u4eec\u6328\u4e2a […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[23],"tags":[],"_links":{"self":[{"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/posts\/7277"}],"collection":[{"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=7277"}],"version-history":[{"count":1,"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/posts\/7277\/revisions"}],"predecessor-version":[{"id":7284,"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/posts\/7277\/revisions\/7284"}],"wp:attachment":[{"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7277"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7277"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7277"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}