{"id":23186,"date":"2024-02-27T08:01:40","date_gmt":"2024-02-27T08:01:40","guid":{"rendered":"https:\/\/www.taosdata.com\/?p=23186"},"modified":"2024-03-08T01:36:49","modified_gmt":"2024-03-08T01:36:49","slug":"tdengine-%e8%b5%84%e6%b7%b1%e7%a0%94%e5%8f%91%e5%88%86%e4%ba%ab%e8%a7%a3%e5%86%b3%e6%80%9d%e8%b7%af%ef%bc%8c%e9%95%bf%e6%9f%a5%e8%af%a2%e4%b8%8d%e5%86%8d%e6%88%90%e4%b8%ba%e7%b3%bb%e7%bb%9f%e6%80%a7","status":"publish","type":"post","link":"https:\/\/www.taosdata.com\/tdengine-engineering\/23186.html","title":{"rendered":"TDengine \u8d44\u6df1\u7814\u53d1\u5206\u4eab\u89e3\u51b3\u601d\u8def\uff0c\u957f\u67e5\u8be2\u4e0d\u518d\u6210\u4e3a\u7cfb\u7edf\u6027\u80fd\u74f6\u9888\uff01"},"content":{"rendered":"\n

\u957f\u67e5\u8be2\u95ee\u9898\u6307\u7684\u662f\u5728\u6570\u636e\u5e93\u5199\u5165\u548c\u67e5\u8be2\u5e76\u5b58\u7684\u65e5\u5e38\u5e94\u7528\u573a\u666f\u4e2d\uff0c\u5b58\u5728\u5904\u7406\u6570\u636e\u91cf\u5927\u4e14\u8017\u65f6\u5f88\u957f\u7684\u67e5\u8be2\u957f\u65f6\u95f4\u5360\u7528\u7cfb\u7edf\u8d44\u6e90\uff0c\u5bfc\u81f4\u5199\u5165\u53ef\u80fd\u88ab\u963b\u585e\u7684\u95ee\u9898\u3002\u6709\u65f6\uff0c\u67e5\u8be2\u4ee3\u7801\u5bf9\u4e8e\u8d44\u6e90\u91ca\u653e\u51fd\u6570\u8c03\u7528\u7684\u9057\u5fd8\u4e5f\u53ef\u80fd\u4ee5\u957f\u67e5\u8be2\u95ee\u9898\u7684\u5f62\u5f0f\u8868\u73b0\u51fa\u6765\u3002\u5982\u4f55\u5728\u6570\u636e\u5199\u5165\u4e0d\u88ab\u963b\u585e\u540c\u65f6\uff0c\u4fdd\u8bc1\u957f\u67e5\u8be2\u7684\u6b63\u786e\u8fdb\u884c\u662f\u4e00\u4e2a\u5177\u6709\u6311\u6218\u6027\u7684\u95ee\u9898\u3002<\/p>\n\n\n\n

\u5c3d\u7ba1\u5728\u7edd\u5927\u591a\u6570\u65f6\u5e8f\u6570\u636e\u4f7f\u7528\u573a\u666f\u4e0b\uff0c\u7528\u6237\u4e0d\u592a\u53ef\u80fd\u9047\u5230\u8fd9\u4e2a\u95ee\u9898\uff0c\u4f46\u4e00\u65e6\u51fa\u73b0\uff0c\u4e5f\u4f1a\u8ba9\u4eba\u5934\u75bc\u4e0d\u5df2\u3002\u4e3a\u4e86\u89e3\u51b3\u8fd9\u4e00\u95ee\u9898\uff0cTDengine<\/a> \u7814\u53d1\u56e2\u961f\u4e00\u76f4\u81f4\u529b\u4e8e\u4e0d\u65ad\u4f18\u5316\u7cfb\u7edf\uff0c\u63d0\u9ad8\u67e5\u8be2\u6027\u80fd\u548c\u54cd\u5e94\u901f\u5ea6\u3002\u672c\u6587\u5c06\u6df1\u5165\u5256\u6790\u8fd9\u4e00\u6311\u6218\uff0c\u5e76\u63a2\u8ba8\u5982\u4f55\u5e94\u5bf9\u548c\u89e3\u51b3\u957f\u67e5\u8be2\u95ee\u9898\uff0c\u4ee5\u63d0\u5347 TDengine \u5728\u590d\u6742\u67e5\u8be2\u573a\u666f\u4e0b\u7684\u8868\u73b0\u3002<\/p>\n\n\n\n

\u5728\u5206\u6790\u957f\u67e5\u8be2\u95ee\u9898\u4e4b\u524d\uff0c\u6211\u4eec\u9996\u5148\u9700\u8981\u4e3a\u5927\u5bb6\u666e\u53ca\u4e00\u4e0b TDengine \u7684\u5199\u5165\/\u67e5\u8be2\u5e76\u53d1\u673a\u5236\u3002<\/p>\n\n\n\n

\u6570\u636e\u5199\u5165\/\u8bfb\u53d6\u673a\u5236<\/h3>\n\n\n\n

Vnode \u662f TDengine \u4e2d\u5b58\u50a8\u548c\u67e5\u8be2\u6570\u636e\u7684\u57fa\u672c\u5355\u5143\uff0c\u8fd9\u91cc\u4e3b\u8981\u4ecb\u7ecd Vnode \u7684\u5199\u5165\/\u8bfb\u53d6\u53ca\u5e76\u53d1\u673a\u5236\u3002<\/p>\n\n\n\n

\u6570\u636e\u5199\u5165\u673a\u5236<\/h4>\n\n\n
\n
\"-<\/figure><\/div>\n\n\n

<\/p>\n\n\n\n

    \n
  • \u6bcf\u4e2a Vnode \u5728\u521b\u5efa\u65f6\u90fd\u4f1a\u6839\u636e DB \u53c2\u6570\u5206\u914d\u4e00\u5b9a\u6570\u91cf\u7684\u5185\u5b58<\/li>\n\n\n\n
  • \u8fd9\u4e9b\u5185\u5b58\u5728 Vnode \u4e2d\u88ab\u5206\u4e3a\u4e09\u4e2a\u5185\u5b58\u5757<\/li>\n\n\n\n
  • \u6bcf\u4e2a Vnode \u53ea\u6709\u4e00\u4e2a\u7ebf\u7a0b\u5199\u5165<\/li>\n\n\n\n
  • Vnode \u5728\u5199\u5165\u65f6\uff0c\u4f1a\u4ece\u5185\u5b58\u5757\u7684\u7a7a\u95f2\u5217\u8868 (free list) \u4e2d\u5206\u914d\u4e00\u4e2a\u5185\u5b58\u5757\uff08mem\uff09\uff0c\u4f9b\u6570\u636e\u5199\u5165\u4f7f\u7528<\/li>\n\n\n\n
  • \u5f53\u5185\u5b58\u5757\u4e2d\u6570\u636e\u5199\u5165\u8d85\u8fc7\u4e00\u5b9a\u91cf\u540e\uff0c\u5f00\u59cb\u843d\u76d8\uff08imem\uff09\uff0c\u540c\u65f6\u5206\u914d\u4e00\u4e2a\u65b0\u7684\u5185\u5b58\u5757\u4f9b\u6570\u636e\u5199\u5165\u4f7f\u7528<\/li>\n\n\n\n
  • \u5f53\u5185\u5b58\u5757\u5168\u90e8\u7528\u5b8c\uff0c\u6ca1\u6709\u7a7a\u95f2\u5185\u5b58\u5757\u65f6\uff0c\u5199\u5165\u4f1a\u88ab\u963b\u585e\uff0c\u4e00\u76f4\u7b49\u5f85\u6709\u5185\u5b58\u5757\u91ca\u653e\u51fa\u6765<\/li>\n<\/ul>\n\n\n\n

    \u6570\u636e\u67e5\u8be2\u673a\u5236<\/h4>\n\n\n\n
      \n
    • \u67e5\u8be2\u5206\u591a\u6279\u6b21\u8fdb\u884c\uff0c\u6bcf\u6b21\u8fd4\u56de\u90e8\u5206\u6570\u636e\uff0c\u7136\u540e\u8be5\u67e5\u8be2\u7b49\u5f85\u4e0b\u4e00\u6b21\u62c9\u53d6\u6570\u636e\u7684\u8bf7\u6c42<\/li>\n\n\n\n
    • \u67e5\u8be2\u7ed3\u679c\u662f\u5185\u5b58\uff08mem\/imem\uff09\u6570\u636e\u548c\u786c\u76d8\u6570\u636e\u5408\u5e76\u7684\u7ed3\u679c<\/li>\n\n\n\n
    • \u67e5\u8be2\u5f00\u59cb\u65f6\uff0c\u4f1a\u5148 take snapshot\uff0c\u5f15\u7528\uff08ref\uff09 mem\/imem \u4ee5\u53ca\u786c\u76d8\u6587\u4ef6<\/li>\n\n\n\n
    • \u67e5\u8be2\u7ed3\u675f\u65f6\uff0cunref mem\/imem\uff0c\u5982\u679c\u5185\u5b58\u5757\u7684\u5f15\u7528\u8ba1\u6570\u53d8\u4e3a 0\uff0c\u5219\u5185\u5b58\u5757\u88ab\u56de\u6536\u5230\u7a7a\u95f2\u94fe\u8868\u4e2d<\/li>\n<\/ul>\n\n\n
      \n
      \"-<\/figure><\/div>\n\n\n

      <\/p>\n\n\n\n

      \u957f\u67e5\u8be2\u95ee\u9898<\/h3>\n\n\n\n

      \u65f6\u5e8f\u6570\u636e\u7edd\u5927\u90e8\u5206\u67e5\u8be2\u6301\u7eed\u65f6\u95f4\u90fd\u6bd4\u8f83\u77ed\uff0c\u5982\u67e5\u8be2\u8868\/\u8d85\u7ea7\u8868\u7684\u6700\u540e\u4e00\u6761\u8bb0\u5f55\u3001\u505a count \u6216 sum \u7c7b\u7684\u805a\u5408\u67e5\u8be2\u7b49\u3002\u8fd9\u7c7b\u67e5\u8be2\u6301\u7eed\u65f6\u95f4\u8f83\u77ed\uff0c\u5bf9\u4e8e mem\/imem \u7684\u5360\u7528\u65f6\u95f4\u4e5f\u8f83\u77ed\uff0c\u67e5\u8be2\u5f88\u5feb\u4f1a\u91ca\u653e MemTable \u4f9b Vnode \u56de\u6536\u518d\u6b21\u5229\u7528\uff0c\u4ece\u800c\u4e0d\u5f71\u54cd\u5199\u5165\u7684\u8fdb\u884c\u3002\u4f46\u662f\uff0c\u5982\u679c\u5b58\u5728\u4e00\u4e2a\u6301\u7eed\u65f6\u95f4\u5f88\u957f\u7684\u67e5\u8be2\uff0c\u5982\u8d85\u8fc7 1 \u5c0f\u65f6\u6216 1 \u5929\u7684\u67e5\u8be2\uff0c\u8fd9\u65f6\u5019\u5c31\u4f1a\u51fa\u73b0\u6b64\u7c7b\u95ee\u9898\u3002\u5f53\u7136\uff0c\u53ea\u6709\u4e00\u4e2a\u957f\u67e5\u8be2\u7684\u60c5\u51b5\u4e0b\uff0c\u95ee\u9898\u4e5f\u4e0d\u5927\uff0c\u56e0\u4e3a Vnode \u7684\u5185\u5b58\u6c60\u9ed8\u8ba4\u88ab\u5206\u6210\u4e86 3 \u4e2a\u5185\u5b58\u5757\uff0c\u4e00\u4e2a\u957f\u67e5\u8be2\u6700\u591a\u5360\u7528\u4e24\u4e2a\u5185\u5b58\u5757\uff0c\u8fd8\u5269\u4f59\u4e00\u4e2a\u5185\u5b58\u5757\u53ef\u4ee5\u7528\u6765\u8fdb\u884c\u6301\u7eed\u5199\u5165\u3002\u4f46\u662f\u5982\u679c\u5b58\u5728\u591a\u4e2a\u957f\u67e5\u8be2\uff0cVnode \u4e2d\u7684\u6240\u6709\u5185\u5b58\u5757\u90fd\u53ef\u80fd\u88ab\u957f\u65f6\u95f4\u5360\u7528\uff0c\u65e0\u6cd5\u8fdb\u884c\u56de\u6536\uff0c\u4ece\u800c\u5bfc\u81f4\u5199\u5165\u505c\u6b62\u7684\u60c5\u51b5\u3002<\/p>\n\n\n\n

      \u53e6\u5916\uff0c\u5982\u679c\u67e5\u8be2\u90e8\u5206\u7684\u4ee3\u7801\u5b58\u5728 BUG\uff0c\u5fd8\u8bb0\u5173\u95ed\u67e5\u8be2\u53e5\u67c4\uff0c\u4e5f\u4f1a\u5bfc\u81f4 mem\/imem \u88ab\u957f\u671f\u5360\u7528\uff0c\u963b\u585e\u5199\u5165\u3002\u8fd9\u4e2a\u95ee\u9898\u5728 TDengine \u8ba2\u9605\u548c\u6d41\u8ba1\u7b97\u529f\u80fd\u4e2d\u66fe\u7ecf\u5c31\u51fa\u73b0\u8fc7\u3002<\/p>\n\n\n

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

      <\/p>\n\n\n\n

      \u957f\u67e5\u8be2\u95ee\u9898\u89e3\u51b3\u65b9\u6848<\/h3>\n\n\n\n

      \u6211\u4eec\u9700\u8981\u4e00\u4e2a\u65b9\u6848\uff0c\u53ef\u4ee5\u5728\u957f\u67e5\u8be2\u5927\u91cf\u5b58\u5728\u3001\u6216\u7528\u6237\u5e94\u7528\u4ee3\u7801\u6709\u95ee\u9898\u6ca1\u6709\u53ca\u65f6\u5173\u95ed\u67e5\u8be2\u53e5\u67c4\u3001\u751a\u81f3\u4ea7\u54c1\u4ee3\u7801\u6709\u95ee\u9898\u7684\u60c5\u51b5\u4e0b\uff0c\u4e5f\u80fd\u8fbe\u5230\u65e2\u4e0d\u963b\u585e\u5199\u5165\u4e14\u4e0d\u8ba9\u957f\u67e5\u8be2\u5931\u8d25\u3002\u8be5\u65b9\u6848\u5982\u4e0b\uff1a<\/p>\n\n\n\n

        \n
      1. \u67e5\u8be2\u5728\u83b7\u53d6\u6570\u636e\u5feb\u7167\u65f6\uff0c\u5c06\u67e5\u8be2\u53e5\u67c4\u6ce8\u518c\u5230\u5b83\u6240\u5360\u7528\u7684\u5185\u5b58\u5757\u4e0a\uff0c\u540c\u65f6\u6ce8\u518c\u4e00\u4e2a reseek \u51fd\u6570<\/li>\n\n\n\n
      2. \u5f53\u67e5\u8be2\u7ed3\u675f\u5173\u95ed\u53e5\u67c4\u65f6\uff0c\u8be5\u67e5\u8be2\u5c06\u53e5\u67c4\u4ece\u5b83\u6240\u5360\u7528\u7684\u6240\u6709\u5185\u5b58\u5757\u4e0a\u6ce8\u9500<\/li>\n\n\n\n
      3. \u5f53\u5199\u5165\u53d1\u73b0\u6ca1\u6709\u53ef\u7528\u5185\u5b58\u5757\u65f6\uff0c\u5c1d\u8bd5\u56de\u6536\u5df2\u7ecf COMMIT \u4f46\u662f\u4ecd\u65e7\u88ab\u67e5\u8be2\u5360\u7528\u7684\u6700\u8001\u7684\u5185\u5b58\u5757<\/li>\n\n\n\n
      4. \u5199\u5165\u7ebf\u7a0b\u56de\u6536\u5185\u5b58\u5757\u65f6\uff0c\u904d\u5386\u6240\u6709\u6ce8\u518c\u5728\u8be5\u5185\u5b58\u5757\u4e0a\u7684\u6ce8\u518c\u53e5\u67c4\uff0c\u8c03\u7528 reseek \u51fd\u6570<\/li>\n\n\n\n
      5. reseek \u51fd\u6570\u4f1a\u5c1d\u8bd5\u9501\u67e5\u8be2\u53e5\u67c4\uff0c\u5982\u679c\u9501\u53e5\u67c4\u6210\u529f\uff0c\u5219\u5c06\u67e5\u8be2\u53e5\u67c4\u8bbe\u7f6e\u4e3a RESEEK \u72b6\u6001\uff0c\u540c\u65f6\u5c06\u67e5\u8be2\u7684\u72b6\u6001\u4fdd\u5b58\u4e0b\u6765\u5e76 untake snapshot\uff0c\u5f52\u8fd8\u5360\u7528\u7684\u6240\u6709\u5185\u5b58\u5757<\/li>\n\n\n\n
      6. \u67e5\u8be2\u7ebf\u7a0b\u5728\u67e5\u8be2\u6d3b\u8dc3\u5468\u671f\u5f00\u59cb\u65f6\u9501\u67e5\u8be2\u53e5\u67c4\uff0c\u7136\u540e\u68c0\u67e5\u662f\u5426\u4e3a RESEEK \u72b6\u6001\uff0c\u5982\u679c\u4e3a RESEEK \u72b6\u6001\uff0c\u91cd\u65b0 take snapshot\uff0c\u5e76\u6839\u636e\u4fdd\u5b58\u7684\u67e5\u8be2\u72b6\u6001\uff0c\u6062\u590d\u5404\u79cd\u67e5\u8be2\u53d8\u91cf\uff0c\u63a5\u7740\u8fdb\u884c\u67e5\u8be2<\/li>\n<\/ol>\n\n\n\n

        \u4ece\u4e0a\u8ff0\u65b9\u6848\u4e2d\u6211\u4eec\u53ef\u4ee5\u770b\u5230\uff1a<\/p>\n\n\n\n

          \n
        1. \u5199\u5165\u5728\u53d1\u73b0\u5185\u5b58\u4e0d\u8db3\u7684\u6761\u4ef6\u4e0b\uff0c\u53ef\u4ee5\u4e3b\u52a8\u56de\u6536\u975e\u6fc0\u6d3b\u72b6\u6001\u7684\u67e5\u8be2\u5360\u7528\u7684\u5185\u5b58\u5757\uff0c\u4ece\u800c\u4e0d\u4f1a\u957f\u65f6\u95f4\u963b\u585e\u5199\u5165<\/li>\n\n\n\n
        2. \u957f\u67e5\u8be2\u5728\u5199\u5165\u56de\u6536\u5176\u6240\u5360\u7528\u7684\u5185\u5b58\u5757\u540e\uff0c\u53ef\u4ee5\u6839\u636e\u81ea\u5df1\u4fdd\u5b58\u7684\u67e5\u8be2\u72b6\u6001\uff0c\u91cd\u65b0 take snapshot\uff0c\u7ee7\u7eed\u67e5\u8be2\uff0c\u4ece\u800c\u4e0d\u4f1a\u8ba9\u957f\u67e5\u8be2\u5931\u8d25<\/li>\n<\/ol>\n\n\n
          \n
          \"-<\/figure><\/div>\n\n\n

          <\/p>\n\n\n

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

          <\/p>\n\n\n\n

          \u7b54\u7591\u89e3\u60d1<\/h3>\n\n\n\n

          Q\uff1a\u5982\u4f55\u89e3\u51b3\u6b7b\u9501\u95ee\u9898\uff1f<\/strong> <\/h5>\n\n\n\n

          A\uff1a<\/strong>\u5728\u5199\u5165\u56de\u6536\u5185\u5b58\u5757\u65f6\uff0c\u9700\u8981\u904d\u5386\u67e5\u8be2\u53e5\u67c4\u6ce8\u518c\u94fe\u8868\uff0c\u56e0\u6b64\u9700\u8981\u5bf9\u94fe\u8868\u8fdb\u884c\u52a0\u9501\u64cd\u4f5c\uff0c\u5373\u9700\u8981\u9501\u5b9a\u94fe\u8868\u7684\u9501\u3002\u5728\u8c03\u7528 reseek \u56de\u8c03\u65f6\uff0c\u4e5f\u9700\u8981\u9501\u5b9a\u67e5\u8be2\u53e5\u67c4\u7684\u9501\u3002\u8fd9\u6837\u5c31\u5b58\u5728\u5199\u5165\u7ebf\u7a0b\u51fa\u73b0 lock(mutex_list)–>lock(mutex_qhandle) \u7684\u60c5\u51b5\u3002\u800c\u5728\u67e5\u8be2\u7ed3\u675f\u65f6\uff0c\u9700\u8981\u5c06\u53e5\u67c4\u4ece\u6ce8\u518c\u94fe\u8868\u4e2d\u79fb\u9664\uff0c\u5bfc\u81f4\u51fa\u73b0 lock(mutex_qhandle)–>lock(mutex_list) \u7684\u60c5\u51b5\u3002\u5982\u679c\u4e24\u4e2a\u7ebf\u7a0b\u4e0d\u6309\u7167\u76f8\u540c\u7684\u987a\u5e8f\u5bf9\u4e24\u4e2a\u9501\u8fdb\u884c\u52a0\u9501\uff0c\u5c31\u4f1a\u4ea7\u751f\u6b7b\u9501\u7684\u95ee\u9898\u3002<\/p>\n\n\n\n

          \u4e3a\u4e86\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff0c\u53ef\u4ee5\u91c7\u7528\u4ee5\u4e0b\u4f18\u5316\u65b9\u6848\uff1a<\/p>\n\n\n\n

            \n
          1. \u4f7f\u7528 <\/strong>trylock <\/strong>\u66ff\u4ee3 <\/strong>lock<\/strong>\uff1a\u5bf9\u4e8e\u5199\u5165\u56de\u6536\u8c03\u7528 reseek \u51fd\u6570\u7684\u573a\u666f\uff0c\u53ef\u4ee5\u5c1d\u8bd5\u4f7f\u7528 trylock \u800c\u4e0d\u662f\u76f4\u63a5\u4f7f\u7528 lock \u6765\u83b7\u53d6\u67e5\u8be2\u53e5\u67c4\u7684\u63a7\u5236\u6743\u3002\u901a\u8fc7 trylock \u5c1d\u8bd5\u83b7\u53d6\u9501\uff0c\u53ef\u4ee5\u907f\u514d\u7ebf\u7a0b\u56e0\u7b49\u5f85\u9501\u800c\u88ab\u963b\u585e\uff0c\u4ece\u800c\u51cf\u5c11\u6b7b\u9501\u7684\u98ce\u9669\u3002<\/li>\n\n\n\n
          2. \u591a\u6b21\u5c1d\u8bd5\u673a\u5236<\/strong>\uff1a\u5728\u4f7f\u7528 trylock \u7684\u57fa\u7840\u4e0a\uff0c\u53ef\u4ee5\u7ed3\u5408\u591a\u6b21\u5c1d\u8bd5\u7684\u673a\u5236\u3002\u5982\u679c\u4e00\u6b21 trylock \u672a\u6210\u529f\u83b7\u53d6\u9501\uff0c\u53ef\u4ee5\u8fdb\u884c\u591a\u6b21\u5c1d\u8bd5\uff0c\u76f4\u81f3\u6210\u529f\u83b7\u53d6\u9501\u6216\u8fbe\u5230\u5c1d\u8bd5\u6b21\u6570\u4e0a\u9650\u4e3a\u6b62\u3002\u8fd9\u6837\u80fd\u591f\u589e\u52a0\u83b7\u53d6\u9501\u7684\u673a\u4f1a\uff0c\u964d\u4f4e\u6b7b\u9501\u98ce\u9669\u3002<\/li>\n<\/ol>\n\n\n\n
            Q\uff1a\u957f\u67e5\u8be2\u4f1a\u4e0d\u4f1a\u4e00\u76f4\u88ab\u5199\u5165 reseek\uff0c\u4ece\u800c\u5bfc\u81f4\u67e5\u8be2\u4e00\u76f4\u6062\u590d\uff1f<\/strong><\/h5>\n\n\n\n

            A\uff1a<\/strong>\u4e0d\u4f1a\u5b58\u5728\u8fd9\u79cd\u60c5\u51b5\u3002\u67e5\u8be2\u5728\u6bcf\u6b21\u6253\u5f00\u53e5\u67c4\u65f6\uff0c\u4f1a\u7ed9\u4e00\u4e2a\u7248\u672c\u53f7\uff0c\u8fd9\u4e2a\u7248\u672c\u53f7\u662f\u5df2\u7ecf\u5199\u5165 Vnode \u4e2d\u7684\u6700\u65b0\u6570\u636e\u7684\u7248\u672c\u53f7\uff0c\u67e5\u8be2\u53ea\u80fd\u770b\u5230\u7248\u672c\u53f7\u5c0f\u4e8e\u7b49\u4e8e\u8be5\u7248\u672c\u53f7\u7684\u6570\u636e\u3002\u5f53 take snapshot \u65f6\uff0c\u4f1a\u6839\u636e mem\/imem \u4e2d\u7684\u6570\u636e\u662f\u5426\u88ab\u67e5\u8be2\u7248\u672c\u53f7\u8986\u76d6\u800c\u51b3\u5b9a mem\/imem \u662f\u5426\u88ab\u8be5\u67e5\u8be2\u5f15\u7528\u3002\u968f\u7740\u6570\u636e\u7684\u5199\u5165\uff0c\u65b0\u7684 mem\/imem \u4e2d\u7684\u6570\u636e\u80af\u5b9a\u90fd\u5927\u4e8e\u8be5\u67e5\u8be2\u521b\u5efa\u65f6\u7ed9\u7684\u7248\u672c\u53f7\uff0c\u56e0\u6b64\uff0c\u65b0\u7684 mem\/imem \u4e0d\u4f1a\u88ab\u957f\u67e5\u8be2\u5f15\u7528\u3002\u8fd9\u6837\u4e00\u6765\uff0c\u4e00\u4e2a\u957f\u67e5\u8be2\u6700\u591a\u4f1a\u88ab\u5199\u5165 RESEEK \u4e24\u6b21\u3002<\/p>\n\n\n\n

            \"-<\/figure>\n\n\n\n

            <\/p>\n\n\n\n

            \u4ee5\u4e0a\u5c31\u662f TDengine \u8d44\u6df1\u7814\u53d1\u4eba\u5458\u5bf9\u89e3\u51b3\u957f\u67e5\u8be2\u95ee\u9898\u8fdb\u884c\u7684\u6df1\u5165\u63a2\u8ba8\u3002\u5982\u679c\u4f60\u8fd8\u6709\u5173\u4e8e\u67e5\u8be2\u7684\u66f4\u591a\u95ee\u9898\u60f3\u8981\u8ba8\u8bba\u6216\u4ea4\u6d41\uff0c\u6b22\u8fce\u6dfb\u52a0\u5c0fT vx\uff1atdengine<\/strong> \u5bfb\u6c42\u5e2e\u52a9\uff0c\u4e5f\u53ef\u4ee5\u5728\u4e0b\u65b9\u7559\u8a00\u533a\u8fdb\u884c\u76f8\u5173\u8bc4\u8bba\uff0c\u9759\u5f85\u56de\u590d\u5373\u53ef~<\/p>\n","protected":false},"excerpt":{"rendered":"

            \u672c\u6587\u63a2\u8ba8\u4e86\u5982\u4f55\u5e94\u5bf9\u548c\u89e3\u51b3\u957f\u67e5\u8be2\u95ee\u9898\uff0c\u4ee5\u63d0\u5347 TDengine \u5728\u590d\u6742\u67e5\u8be2\u573a\u666f\u4e0b\u7684\u8868\u73b0\u3002<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[3,7],"tags":[],"_links":{"self":[{"href":"https:\/\/www.taosdata.com\/wp-json\/wp\/v2\/posts\/23186"}],"collection":[{"href":"https:\/\/www.taosdata.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.taosdata.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.taosdata.com\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/www.taosdata.com\/wp-json\/wp\/v2\/comments?post=23186"}],"version-history":[{"count":0,"href":"https:\/\/www.taosdata.com\/wp-json\/wp\/v2\/posts\/23186\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.taosdata.com\/wp-json\/wp\/v2\/media?parent=23186"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.taosdata.com\/wp-json\/wp\/v2\/categories?post=23186"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.taosdata.com\/wp-json\/wp\/v2\/tags?post=23186"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}