{"id":51577,"date":"2025-08-11T00:39:15","date_gmt":"2025-08-10T16:39:15","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/51577.html"},"modified":"2025-08-11T00:39:15","modified_gmt":"2025-08-10T16:39:15","slug":"%e5%86%85%e5%ad%98%e7%a3%81%e7%9b%98%e6%b7%b7%e5%90%88%e5%ad%98%e5%82%a8%e6%95%b0%e6%8d%ae%e5%ba%93-%e5%b9%b3%e8%a1%a1%e8%ae%be%e5%a4%87%e7%9a%84%e5%bf%ab%e4%b8%8e","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/51577.html","title":{"rendered":"\u5185\u5b58+\u78c1\u76d8\u6df7\u5408\u5b58\u50a8\u6570\u636e\u5e93\u2014\u2014\u5e73\u8861\u8bbe\u5907\u7684\u201c\u5feb\u201d\u4e0e\u201c\u7a33\u201d"},"content":{"rendered":"<p>\u5728\u5b9e\u65f6\u5d4c\u5165\u5f0f\u5f00\u53d1\u4e2d&#xff0c;\u6570\u636e\u7ba1\u7406\u5f80\u5f80\u9762\u4e34 \u201c\u4e24\u96be\u9009\u62e9\u201d&#xff1a;<\/p>\n<p>&#8211; \u7528\u5185\u5b58\u6570\u636e\u5e93&#xff08;IMDS&#xff09;\u80fd\u83b7\u5f97\u6781\u81f4\u6027\u80fd&#xff0c;\u4f46\u6570\u636e\u6613\u5931\u4e14\u6210\u672c\u9ad8&#xff1b; &#8211; \u7528\u78c1\u76d8\u6570\u636e\u5e93\u80fd\u4fdd\u8bc1\u6301\u4e45\u6027&#xff0c;\u4f46 I\/O \u5f00\u9500\u4f1a\u62d6\u6162\u5b9e\u65f6\u54cd\u5e94\u3002<\/p>\n<p>\u800c McObject \u7684 eXtremeDB \u901a\u8fc7 \u201c\u6df7\u5408\u5b58\u50a8\u201d \u6a21\u5f0f\u6253\u7834\u4e86\u8fd9\u79cd\u5bf9\u7acb&#xff0c;\u672c\u6587\u5c06\u4ece\u6280\u672f\u7ec6\u8282\u3001\u5b9e\u6218\u4ee3\u7801\u5230\u843d\u5730\u573a\u666f&#xff0c;\u5e26\u4f60\u5168\u9762\u638c\u63e1\u8fd9\u6b3e\u6570\u636e\u5e93\u7684\u6838\u5fc3\u80fd\u529b\u3002<\/p>\n<p>eXtremeDB \u7684\u672c\u8d28\u662f**\u201c\u5185\u5b58 &#043; \u78c1\u76d8\u201d \u7684\u6df7\u5408\u6570\u636e\u5e93**&#xff0c;\u65e2\u4fdd\u7559\u4e86\u5185\u5b58\u6570\u636e\u5e93\u7684\u9ad8\u6027\u80fd&#xff0c;\u53c8\u5177\u5907\u78c1\u76d8\u6570\u636e\u5e93\u7684\u6301\u4e45\u6027&#xff0c;\u540c\u65f6\u9488\u5bf9\u5d4c\u5165\u5f0f\u573a\u666f\u505a\u4e86\u6781\u81f4\u4f18\u5316\u3002\u6838\u5fc3\u7279\u6027\u5305\u62ec&#xff1a;<\/p>\n<ul>\n<li>\n<p>\u4ee3\u7801\u4f53\u79ef&#xff1a;\u4ec5 200K \u5de6\u53f3&#xff0c;\u9002\u5408 RAM\/ROM \u6709\u9650\u7684\u5d4c\u5165\u5f0f\u8bbe\u5907&#xff08;\u5982\u7269\u8054\u7f51\u4f20\u611f\u5668\u3001\u5de5\u4e1a\u63a7\u5236\u5668&#xff09;\u3002<\/p>\n<\/li>\n<li>\n<p>\u6027\u80fd&#xff1a;\u5fae\u79d2\u7ea7\u4e8b\u52a1\u54cd\u5e94&#xff08;\u5373\u4f7f\u5728\u4f4e\u7aef\u786c\u4ef6\u4e0a&#xff09;&#xff0c;\u901a\u8fc7\u6d88\u9664\u6587\u4ef6\u7cfb\u7edf I\/O\u3001\u5197\u4f59\u7f13\u5b58\u7b49\u8fc7\u7a0b&#xff0c;\u6bd4\u4f20\u7edf\u78c1\u76d8\u6570\u636e\u5e93\u5feb 10-100 \u500d\u3002<\/p>\n<\/li>\n<\/ul>\n<h4>\u6df7\u5408\u5b58\u50a8\u6a21\u5f0f&#xff1a;\u7075\u6d3b\u63a7\u5236\u6570\u636e\u5b58\u54ea\u91cc<\/h4>\n<p>\u5f00\u53d1\u8005\u53ef\u901a\u8fc7 schema \u58f0\u660e\u76f4\u63a5\u6307\u5b9a\u6570\u636e\u5b58\u50a8\u4f4d\u7f6e&#xff08;\u5185\u5b58 \/ \u78c1\u76d8&#xff09;&#xff0c;\u65e0\u9700\u989d\u5916\u4ee3\u7801&#xff1a;<\/p>\n<p>    \/\/ \u5185\u5b58\u5b58\u50a8&#xff08;\u4e34\u65f6\u6570\u636e&#xff0c;\u5982\u5b9e\u65f6\u4f20\u611f\u5668\u8bfb\u6570&#xff09; <\/p>\n<p>    transient class RealTimeSensorData { <\/p>\n<p>       int sensor_id;       \/\/ \u4f20\u611f\u5668ID <\/p>\n<p>       double value;        \/\/ \u5b9e\u65f6\u503c <\/p>\n<p>       timestamp update_time; \/\/ \u66f4\u65b0\u65f6\u95f4 <\/p>\n<p>    }; <\/p>\n<p>    \/\/ \u78c1\u76d8\u5b58\u50a8&#xff08;\u6301\u4e45\u6570\u636e&#xff0c;\u5982\u8bbe\u5907\u914d\u7f6e\u3001\u5386\u53f2\u65e5\u5fd7&#xff09; <\/p>\n<p>    persistent class DeviceConfig { <\/p>\n<p>       int device_id;       \/\/ \u8bbe\u5907ID <\/p>\n<p>       string config_json;  \/\/ \u914d\u7f6e\u4fe1\u606f&#xff08;JSON\u683c\u5f0f&#xff09; <\/p>\n<p>       timestamp last_modify; \/\/ \u6700\u540e\u4fee\u6539\u65f6\u95f4 <\/p>\n<p>    }; <\/p>\n<ul>\n<li>\n<p>transient\u7c7b&#xff1a;\u6570\u636e\u4ec5\u5b58\u4e8e\u5185\u5b58&#xff0c;\u9002\u5408\u9ad8\u9891\u66f4\u65b0\u3001\u4e34\u65f6\u4f7f\u7528\u7684\u6570\u636e&#xff08;\u5982\u5b9e\u65f6\u76d1\u63a7\u6570\u636e&#xff09;&#xff0c;\u907f\u514d\u78c1\u76d8 I\/O \u5f00\u9500\u3002<\/p>\n<\/li>\n<li>\n<p>persistent\u7c7b&#xff1a;\u6570\u636e\u6301\u4e45\u5316\u5230\u78c1\u76d8&#xff0c;\u9002\u5408\u9700\u8981\u957f\u671f\u4fdd\u5b58\u7684\u6570\u636e&#xff08;\u5982\u914d\u7f6e\u3001\u65e5\u5fd7&#xff09;&#xff0c;\u786e\u4fdd\u65ad\u7535\u4e0d\u4e22\u5931\u3002<\/p>\n<\/li>\n<\/ul>\n<h4>\u5f3a\u5927\u7684\u7d22\u5f15\u4e0e\u4e8b\u52a1\u7ba1\u7406<\/h4>\n<ul>\n<li>\u591a\u7c7b\u578b\u7d22\u5f15&#xff1a;\u652f\u6301\u54c8\u5e0c\u7d22\u5f15&#xff08;\u7cbe\u786e\u5339\u914d&#xff09;\u3001\u6811\u7d22\u5f15&#xff08;\u8303\u56f4\u67e5\u8be2 \/ \u6392\u5e8f&#xff09;\u3001R \u6811&#xff08;\u5730\u7406\u7a7a\u95f4&#xff09;\u3001KD \u6811&#xff08;\u7a7a\u95f4\u68c0\u7d22&#xff09;\u7b49&#xff0c;\u6ee1\u8db3\u4e0d\u540c\u573a\u666f\u7684\u67e5\u8be2\u9700\u6c42\u3002\u4f8b\u5982&#xff0c;\u5de5\u4e1a\u8bbe\u5907\u7684\u5730\u7406\u5206\u5e03\u67e5\u8be2\u53ef\u7528 R \u6811\u7d22\u5f15&#xff1a;<\/li>\n<\/ul>\n<p>    \/\/ \u4e3a\u5730\u7406\u5750\u6807\u5b57\u6bb5\u521b\u5efaR\u6811\u7d22\u5f15 <\/p>\n<p>    persistent class IndustrialDevice { <\/p>\n<p>       int device_id; <\/p>\n<p>       rect location; \/\/ \u8bbe\u5907\u6240\u5728\u533a\u57df&#xff08;\u77e9\u5f62\u5750\u6807&#xff09; <\/p>\n<p>       index rtree_idx on location; \/\/ R\u6811\u7d22\u5f15\u52a0\u901f\u5730\u7406\u67e5\u8be2 <\/p>\n<p>    }; <\/p>\n<ul>\n<li>\n<p>\u4e8b\u52a1\u4e0e\u9ad8\u53ef\u7528&#xff1a;<\/p>\n<ul>\n<li>\n<p>\u652f\u6301 MVCC&#xff08;\u591a\u7248\u672c\u5e76\u53d1\u63a7\u5236&#xff09;&#xff0c;\u591a\u7ebf\u7a0b \/ \u591a\u6838\u573a\u666f\u4e0b\u65e0\u9501\u51b2\u7a81&#xff0c;\u63d0\u5347\u5e76\u53d1\u6027\u80fd\u3002<\/p>\n<\/li>\n<li>\n<p>\u9ad8\u53ef\u7528\u7248\u672c\u63d0\u4f9b\u5f02\u6b65&#xff08;1-safe&#xff09;\u6216\u540c\u6b65&#xff08;2-safe&#xff09;\u590d\u5236&#xff0c;\u786e\u4fdd\u6545\u969c\u65f6\u6570\u636e\u4e0d\u4e22\u5931&#xff08;\u5982\u5de5\u4e1a\u63a7\u5236\u7cfb\u7edf\u7684\u4e3b\u5907\u5207\u6362&#xff09;\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3>\u5b9e\u6218\u6848\u4f8b&#xff1a;\u7528 eXtremeDB \u6784\u5efa\u5de5\u4e1a\u5b9e\u65f6\u76d1\u63a7\u7cfb\u7edf<\/h3>\n<p>\u4ee5\u67d0\u56fd\u9645\u4e00\u7ebf\u7535\u6c14\u7684\u5178\u578b\u573a\u666f\u4e3a\u4f8b&#xff1a;\u5de5\u4e1a\u751f\u4ea7\u7ebf\u9700\u8981\u5b9e\u65f6\u91c7\u96c6\u8bbe\u5907\u72b6\u6001&#xff08;\u6e29\u5ea6\u3001\u538b\u529b&#xff09;&#xff0c;\u5e76\u6301\u4e45\u5316\u4fdd\u5b58\u5386\u53f2\u6570\u636e\u7528\u4e8e\u6545\u969c\u5206\u6790\u3002<\/p>\n<h4>1. \u9700\u6c42\u62c6\u89e3<\/h4>\n<ul>\n<li>\n<p>\u5b9e\u65f6\u6027&#xff1a;\u8bbe\u5907\u72b6\u6001\u6bcf 10ms \u66f4\u65b0\u4e00\u6b21&#xff0c;\u9700\u5fae\u79d2\u7ea7\u54cd\u5e94\u67e5\u8be2\u3002<\/p>\n<\/li>\n<li>\n<p>\u6301\u4e45\u6027&#xff1a;\u5386\u53f2\u6570\u636e\u9700\u4fdd\u5b58 6 \u4e2a\u6708&#xff0c;\u652f\u6301\u6309\u65f6\u95f4\u8303\u56f4\u67e5\u8be2\u3002<\/p>\n<\/li>\n<li>\n<p>\u8d44\u6e90\u9650\u5236&#xff1a;\u63a7\u5236\u5668 RAM \u4ec5 512MB&#xff0c;\u9700\u63a7\u5236\u6570\u636e\u5e93\u5360\u7528\u3002<\/p>\n<\/li>\n<\/ul>\n<h4>2. \u5b9e\u73b0\u65b9\u6848<\/h4>\n<h5>&#xff08;1&#xff09;\u5b9a\u4e49\u6570\u636e\u6a21\u578b<\/h5>\n<p>    \/\/ \u5185\u5b58\u5b58\u50a8&#xff1a;\u5b9e\u65f6\u8bbe\u5907\u72b6\u6001&#xff08;\u9ad8\u9891\u66f4\u65b0&#xff0c;\u65e0\u9700\u6301\u4e45\u5316&#xff09; <\/p>\n<p>    transient class DeviceRealTimeState { <\/p>\n<p>       int device_id; <\/p>\n<p>       float temperature; \/\/ \u6e29\u5ea6&#xff08;\u2103&#xff09; <\/p>\n<p>       float pressure;    \/\/ \u538b\u529b&#xff08;kPa&#xff09; <\/p>\n<p>       timestamp update_ts; <\/p>\n<p>       index hash_idx on device_id; \/\/ \u54c8\u5e0c\u7d22\u5f15\u52a0\u901f\u5355\u8bbe\u5907\u67e5\u8be2 <\/p>\n<p>    }; <\/p>\n<p>    \/\/ \u78c1\u76d8\u5b58\u50a8&#xff1a;\u5386\u53f2\u6570\u636e&#xff08;\u6bcf5\u5206\u949f\u6c47\u603b\u4e00\u6b21&#xff0c;\u6301\u4e45\u5316&#xff09; <\/p>\n<p>    persistent class DeviceHistory { <\/p>\n<p>       int device_id; <\/p>\n<p>       float avg_temperature; \/\/ 5\u5206\u949f\u5e73\u5747\u6e29\u5ea6 <\/p>\n<p>       float avg_pressure;    \/\/ 5\u5206\u949f\u5e73\u5747\u538b\u529b <\/p>\n<p>       timestamp start_ts;    \/\/ \u65f6\u95f4\u6bb5\u8d77\u59cb <\/p>\n<p>       timestamp end_ts;      \/\/ \u65f6\u95f4\u6bb5\u7ed3\u675f <\/p>\n<p>       index tree_idx on (device_id, start_ts); \/\/ \u6811\u7d22\u5f15\u652f\u6301\u6309\u8bbe\u5907&#043;\u65f6\u95f4\u8303\u56f4\u67e5\u8be2 <\/p>\n<p>    }; <\/p>\n<h5>&#xff08;2&#xff09;\u6838\u5fc3\u64cd\u4f5c\u4ee3\u7801&#xff08;C API&#xff09;<\/h5>\n<p>    #include &#034;mco.h&#034; <\/p>\n<p>    \/\/ \u521d\u59cb\u5316\u6570\u636e\u5e93&#xff08;\u6df7\u5408\u6a21\u5f0f&#xff09; <\/p>\n<p>    mco_db_params_t params; <\/p>\n<p>    mco_db_params_init(&amp;params); <\/p>\n<p>    params.memory_page_size &#061; 4096; \/\/ \u9875\u5927\u5c0f&#xff08;\u6839\u636e\u8bbe\u5907\u5185\u5b58\u914d\u7f6e&#xff09; <\/p>\n<p>    params.disk_file &#061; &#034;device_db.dbs&#034;; \/\/ \u78c1\u76d8\u6570\u636e\u5e93\u6587\u4ef6 <\/p>\n<p>    mco_db_open(&#034;device_db&#034;, device_schema, &amp;params, 0); <\/p>\n<p>    \/\/ \u63d2\u5165\u5b9e\u65f6\u6570\u636e&#xff08;\u5185\u5b58\u64cd\u4f5c&#xff0c;\u5fae\u79d2\u7ea7&#xff09; <\/p>\n<p>    mco_trans_start(db, MCO_READ_WRITE, MCO_TRANS_FAST, &amp;txn); <\/p>\n<p>    DeviceRealTimeState state &#061; {1, 25.3, 101.2, mco_timestamp_now()}; <\/p>\n<p>    mco_obj_insert(txn, &amp;state); <\/p>\n<p>    mco_trans_commit(txn); <\/p>\n<p>    \/\/ \u5b9a\u65f6\u5c06\u5b9e\u65f6\u6570\u636e\u6c47\u603b\u5230\u78c1\u76d8&#xff08;\u6bcf5\u5206\u949f&#xff09; <\/p>\n<p>    mco_trans_start(db, MCO_READ_WRITE, 0, &amp;txn); <\/p>\n<p>    \/\/ \u67e5\u8be2\u6700\u8fd15\u5206\u949f\u7684\u5b9e\u65f6\u6570\u636e\u5e76\u8ba1\u7b97\u5e73\u5747\u503c&#xff08;\u7701\u7565\u67e5\u8be2\u903b\u8f91&#xff09; <\/p>\n<p>    DeviceHistory history &#061; {1, 25.1, 101.3, start_ts, end_ts}; <\/p>\n<p>    mco_obj_insert(txn, &amp;history); <\/p>\n<p>    mco_trans_commit(txn); <\/p>\n<p>    \/\/ \u6309\u65f6\u95f4\u8303\u56f4\u67e5\u8be2\u5386\u53f2\u6570\u636e&#xff08;\u6811\u7d22\u5f15\u52a0\u901f&#xff09; <\/p>\n<p>    mco_cursor_t cursor; <\/p>\n<p>    mco_trans_start(db, MCO_READ_ONLY, 0, &amp;txn); <\/p>\n<p>    mco_cursor_init(txn, DeviceHistory::tree_idx, &amp;cursor); <\/p>\n<p>    mco_cursor_set_range(&amp;cursor, &amp;key_start, &amp;key_end); \/\/ key_start\/end\u4e3a\u8bbe\u5907ID&#043;\u65f6\u95f4\u8303\u56f4 <\/p>\n<p>    while (MCO_CURSOR_OK &#061;&#061; mco_cursor_next(&amp;cursor, &amp;history)) { <\/p>\n<p>       \/\/ \u5904\u7406\u5386\u53f2\u6570\u636e <\/p>\n<p>    } <\/p>\n<p>    mco_trans_commit(txn); <\/p>\n<h4>3. \u4f18\u5316\u8981\u70b9<\/h4>\n<ul>\n<li>\n<p>\u4e8b\u52a1\u65e5\u5fd7\u7b56\u7565&#xff1a;\u5bf9\u78c1\u76d8\u6570\u636e\u91c7\u7528 \u201cRedo Log\u201d&#xff08;\u4ec5\u8bb0\u5f55\u4fee\u6539&#xff09;&#xff0c;\u51cf\u5c11 I\/O&#xff1b;\u5185\u5b58\u6570\u636e\u5173\u95ed\u65e5\u5fd7&#xff08;No 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