{"id":201602,"date":"2025-05-10T11:28:53","date_gmt":"2025-05-10T03:28:53","guid":{"rendered":"https:\/\/server.hk\/cnblog\/201602\/"},"modified":"2025-05-10T11:28:53","modified_gmt":"2025-05-10T03:28:53","slug":"%e6%b5%85%e8%b0%88redis%e5%9c%a8%e7%a7%92%e6%9d%80%e5%9c%ba%e6%99%af%e7%9a%84%e4%bd%9c%e7%94%a8","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/201602\/","title":{"rendered":"\u6d45\u8c08Redis\u5728\u79d2\u6740\u573a\u666f\u7684\u4f5c\u7528"},"content":{"rendered":"

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

\u6d45\u8c08Redis\u5728\u79d2\u6740\u573a\u666f\u7684\u4f5c\u7528<\/h1>\n

<\/i>\u6536\u85cf<\/span> <\/p>\n

\u4ece\u73b0\u5728\u5f00\u59cb\uff0c\u6211\u4eec\u8981\u52aa\u529b\u5b66\u4e60\u5566\uff01\u4eca\u5929\u6211\u7ed9\u5927\u5bb6\u5e26\u6765\u300a\u6d45\u8c08Redis\u5728\u79d2\u6740\u573a\u666f\u7684\u4f5c\u7528\u300b<\/span>\uff0c\u611f\u5174\u8da3\u7684\u670b\u53cb\u8bf7\u7ee7\u7eed\u770b\u4e0b\u53bb\u5427\uff01\u4e0b\u6587\u4e2d\u7684\u5185\u5bb9\u6211\u4eec\u4e3b\u8981\u4f1a\u6d89\u53ca\u5230redis\u79d2\u6740<\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5982\u679c\u5728\u9605\u8bfb\u672c\u6587\u8fc7\u7a0b\u4e2d\u6709\u9047\u5230\u4e0d\u6e05\u695a\u7684\u5730\u65b9\uff0c\u6b22\u8fce\u7559\u8a00\u5440\uff01\u6211\u4eec\u4e00\u8d77\u8ba8\u8bba\uff0c\u4e00\u8d77\u5b66\u4e60\uff01<\/p>\n

\u79d2\u6740\u4e1a\u52a1\u7279\u70b9\uff1a\u9650\u65f6\u9650\u91cf\uff0c\u4e1a\u52a1\u7cfb\u7edf\u8981\u5904\u7406\u77ac\u65f6\u9ad8\u5e76\u53d1\u8bf7\u6c42\uff0cRedis\u662f\u5fc5\u9700\u54c1\u3002<\/p>\n

\u79d2\u6740\u53ef\u5206\u6210\u79d2\u6740\u524d\u3001\u79d2\u6740\u4e2d\u548c\u79d2\u6740\u540e\u4e09\u9636\u6bb5\uff0c\u6bcf\u4e2a\u9636\u6bb5\u7684\u8bf7\u6c42\u5904\u7406\u9700\u6c42\u4e0d\u540c\uff0cRedis\u5177\u4f53\u5728\u79d2\u6740\u573a\u666f\u7684\u54ea\u4e2a\u73af\u8282\u8d77\u5230\u4f5c\u7528\u5462\uff1f<\/p>\n

1 \u79d2\u6740\u8d1f\u8f7d\u7279\u5f81<\/h2>\n

\u79d2\u6740\u5546\u54c1\u7684\u5e93\u5b58\u91cf\uff1c\uff1c\u8d2d\u4e70\u8be5\u5546\u54c1\u7684\u7528\u6237\u6570\uff0c\u4e14\u4f1a\u9650\u5b9a\u7528\u6237\u53ea\u80fd\u5728\u4e00\u5b9a\u65f6\u95f4\u6bb5\u5185\u8d2d\u4e70\u3002
\u8fd9\u7ed9\u79d2\u6740\u7cfb\u7edf\u5e26\u6765\u4e24\u4e2a\u660e\u663e\u8d1f\u8f7d\u7279\u5f81\uff1a<\/p>\n

1.1 \u77ac\u65f6\u5e76\u53d1\u8bbf\u95ee\u91cf\u5f88\u9ad8<\/h3>\n

\u4e00\u822cDB\u6bcf\u79d2\u53ea\u80fd\u652f\u6491k\u7ea7\u5e76\u53d1\uff0c\u800cRedis\u5e76\u53d1\u80fd\u8fbe\u5230w\u7ea7\u3002\u6240\u4ee5\uff0c\u5f53\u5927\u91cf\u5e76\u53d1\u8bf7\u6c42\u6d8c\u5165\u79d2\u6740\u7cfb\u7edf\u65f6\uff0c\u8981\u4f7f\u7528Redis\u5148\u62e6\u622a\u5927\u90e8\u5206\u8bf7\u6c42\uff0c\u907f\u514d\u5927\u91cf\u8bf7\u6c42\u76f4\u63a5\u53d1\u7ed9DB<\/p>\n

1.2 \u8bfb\u591a\u5199\u5c11<\/h3>\n

\u8bfb\u8fd8\u662f\u7b80\u5355\u7684\u67e5\u8be2\u64cd\u4f5c\u3002\u79d2\u6740\u4e0b\uff0c\u7528\u6237\u9700\u5148\u67e5\u9a8c\u5546\u54c1\u662f\u5426\u8fd8\u6709\u5e93\u5b58\uff08\u5373\u6839\u636e\u5546\u54c1ID\u67e5\u8be2\u8be5\u5e93\u5b58\u91cf\uff09\uff0c\u53ea\u6709\u5e93\u5b58\u6709\u4f59\u91cf\u65f6\uff0c\u79d2\u6740\u7cfb\u7edf\u624d\u80fd\u8fdb\u884c\u5e93\u5b58\u6263\u51cf\u3001\u4e0b\u5355\u3002\u53ef\u672c\u5730\u7f13\u5b58\u4fdd\u5b58\u5e93\u5b58\u662f\u5426\u4e3a 0 \u7684\u6807\u8bc6\uff0c\u907f\u514d\u518d\u8bf7\u6c42 redis\u3002<\/p>\n

\u5e93\u5b58\u67e5\u9a8c\u64cd\u4f5c\u662f\u5178\u578bKV\u67e5\u8be2\uff0cRedis\u6b63\u6ee1\u8db3\u3002\u4f46\u79d2\u6740\u53ea\u6709\u5c0f\u90e8\u5206\u7528\u6237\u80fd\u6210\u529f\u4e0b\u5355\uff0c\u6240\u4ee5\uff1a
\u5546\u54c1\u5e93\u5b58\u67e5\u8be2\u64cd\u4f5c\uff08\u8bfb\u64cd\u4f5c\uff09\uff1e\uff1e\u5e93\u5b58\u6263\u51cf\u3001\u4e0b\u5355\u64cd\u4f5c\uff08\u5199\u64cd\u4f5c\uff09<\/p>\n

\u4e00\u822c\u628a\u79d2\u6740\u6d3b\u52a8\u5206\u6210\u4e09\u4e2a\u9636\u6bb5\uff1a<\/p>\n

2 \u79d2\u6740\u9636\u6bb5<\/h2>\n

2.1 \u79d2\u6740\u524d<\/h3>\n

\u7528\u6237\u4e0d\u65ad\u5237\u65b0\u5546\u54c1\u8be6\u60c5\u9875\uff0c\u5bfc\u81f4\u8be6\u60c5\u9875\u77ac\u65f6\u8bf7\u6c42\u91cf\u731b\u589e\u3002<\/p>\n

\u4e00\u822c\u5c3d\u91cf\u9759\u6001\u5316\u5546\u54c1\u8be6\u60c5\u9875\u7684\u9875\u9762\u5143\u7d20\uff0c\u7136\u540e\u4f7f\u7528CDN\u6216\u6d4f\u89c8\u5668\u7f13\u5b58\u8fd9\u4e9b\u9759\u6001\u5316\u5143\u7d20\u3002
\u79d2\u6740\u524d\u7684\u5927\u91cf\u8bf7\u6c42\u53ef\u76f4\u63a5\u7531CDN\u6216\u6d4f\u89c8\u5668\u7f13\u5b58\u670d\u52a1\uff0c\u4e0d\u4f1a\u5230\u8fbe\u670d\u52a1\u7aef\u3002<\/p>\n

2.2 \u79d2\u6740\u4e2d<\/h3>\n

\u5927\u91cf\u7528\u6237\u70b9\u51fb\u5546\u54c1\u8be6\u60c5\u9875\u4e0a\u7684\u79d2\u6740\u6309\u94ae\uff0c\u4f1a\u4ea7\u751f\u5927\u91cf\u7684\u5e76\u53d1\u8bf7\u6c42\u67e5\u8be2\u5e93\u5b58\u3002\u4e00\u65e6\u67d0\u4e2a\u8bf7\u6c42\u67e5\u8be2\u5230\u6709\u5e93\u5b58\uff0c\u7d27\u63a5\u7740\u7cfb\u7edf\u5c31\u4f1a\u8fdb\u884c\u5e93\u5b58\u6263\u51cf\u3002\u7136\u540e\uff0c\u7cfb\u7edf\u4f1a\u751f\u6210\u5b9e\u9645\u8ba2\u5355\uff0c\u5e76\u8fdb\u884c\u540e\u7eed\u5904\u7406\uff0c\u4f8b\u5982\u8ba2\u5355\u652f\u4ed8\u548c\u7269\u6d41\u670d\u52a1\u3002\u5982\u679c\u8bf7\u6c42\u67e5\u4e0d\u5230\u5e93\u5b58\uff0c\u5c31\u4f1a\u8fd4\u56de\u3002\u7528\u6237\u901a\u5e38\u4f1a\u7ee7\u7eed\u70b9\u51fb\u79d2\u6740\u6309\u94ae\uff0c\u7ee7\u7eed\u67e5\u8be2\u5e93\u5b58\u3002<\/p>\n

\u8be5\u9636\u6bb5\u4e3b\u8981\u64cd\u4f5c\uff1a<\/p>\n

    \n
  • \u5e93\u5b58\u67e5\u9a8c<\/li>\n
  • \u5e93\u5b58\u6263\u51cf<\/li>\n
  • \u8ba2\u5355\u5904\u7406<\/li>\n<\/ul>\n

    \u6bcf\u4e2a\u79d2\u6740\u8bf7\u6c42\u90fd\u4f1a\u67e5\u8be2\u5e93\u5b58\uff0c\u800c\u8bf7\u6c42\u53ea\u6709\u67e5\u5230\u6709\u5e93\u5b58\u4f59\u91cf\uff0c\u540e\u7eed\u7684\u5e93\u5b58\u6263\u51cf\u548c\u8ba2\u5355\u5904\u7406\u624d\u4f1a\u88ab\u6267\u884c\u3002\u6240\u4ee5\uff0c\u8be5\u9636\u6bb5\u6700\u5927\u5e76\u53d1\u538b\u529b\u5728\u5e93\u5b58\u67e5\u9a8c\u3002\u5c31\u9700\u4f7f\u7528Redis\u4fdd\u5b58\u5e93\u5b58\u91cf\uff0c\u8bf7\u6c42\u76f4\u63a5\u4eceRedis\u8bfb\u5e93\u5b58\u5e76\u67e5\u9a8c\u3002<\/p>\n

    \u5e93\u5b58\u6263\u51cf\u548c\u8ba2\u5355\u5904\u7406\u662f\u5426\u90fd\u53ef\u4ea4\u7ed9\u540e\u7aefDB\u6267\u884c?<\/strong><\/p>\n

    \u8ba2\u5355\u5904\u7406\u53ef\u5728DB\u6267\u884c\uff0c\u4f46\u5e93\u5b58\u6263\u51cf\u64cd\u4f5c\uff0c\u4e0d\u80fd\u4ea4\u7ed9DB\u3002<\/p>\n

    \u4e3a\u4f55\u975e\u5728DB\u5904\u7406\u8ba2\u5355\u5462\uff1f<\/strong><\/p>\n

    \u8ba2\u5355\u5904\u7406\u6d89\u53ca\u652f\u4ed8\u3001\u5546\u54c1\u51fa\u5e93\u3001\u7269\u6d41\u7b49\u591a\u4e2a\u5173\u8054\u64cd\u4f5c\uff0c\u8fd9\u4e9b\u64cd\u4f5c\u672c\u8eab\u6d89\u53caDB\u4e2d\u7684\u591a\u5f20\u8868\uff0c\u8981\u4fdd\u8bc1\u4e8b\u52a1\u6027\uff0c\u9700\u5728DB\u5b8c\u6210\u3002
    \u8ba2\u5355\u5904\u7406\u65f6\uff0c\u8bf7\u6c42\u538b\u529b\u5df2\u4e0d\u5927\uff0cDB\u5b8c\u5168\u53ef\u652f\u6491\u3002<\/p>\n

    \u4e3a\u5565\u5e93\u5b58\u6263\u51cf\u64cd\u4f5c\u4e0d\u80fd\u5728DB\u6267\u884c<\/strong><\/p>\n

    \u4e00\u65e6\u8bf7\u6c42\u67e5\u5230\u6709\u5e93\u5b58\uff0c\u5373\u53d1\u9001\u8be5\u8bf7\u6c42\u7684\u7528\u6237\u83b7\u5f97\u5546\u54c1\u8d2d\u4e70\u8d44\u683c\uff0c\u7528\u6237\u5c31\u4f1a\u4e0b\u5355\u4e86\u3002\u540c\u65f6\uff0c\u5546\u54c1\u5e93\u5b58\u4f59\u91cf\u4e5f\u9700-1\u3002<\/p>\n

    \u82e5\u628a\u5e93\u5b58\u6263\u51cf\u7684\u64cd\u4f5c\u653e\u5230DB\uff0c\u4f1a\u5e26\u6765\u98ce\u9669\uff1a<\/p>\n

    \u989d\u5916\u5f00\u9500<\/strong>
    Redis\u4fdd\u5b58\u5e93\u5b58\u91cf\uff0c\u800c\u5e93\u5b58\u91cf\u6700\u65b0\u503c\u53c8\u662fDB\u5728\u7ef4\u62a4\uff0c\u6240\u4ee5DB\u66f4\u65b0\u540e\uff0c\u8fd8\u8981\u548cRedis\u8fdb\u884c\u540c\u6b65\uff0c\u8fd9\u589e\u52a0\u989d\u5916\u64cd\u4f5c\u903b\u8f91<\/p>\n

    \u4e0b\u5355\u91cf\uff1e\u5b9e\u9645\u5e93\u5b58\u91cf\uff0c\u8d85\u5356\uff01<\/strong>
    \u7531\u4e8eDB\u5904\u7406\u6027\u80fd\u8f83\u6162\uff0c\u65e0\u6cd5\u53ca\u65f6\u66f4\u65b0\u5e93\u5b58\u4f59\u91cf\uff0c\u53ef\u80fd\u5bfc\u81f4\u5927\u91cf\u5e93\u5b58\u67e5\u9a8c\u8bf7\u6c42\u8bfb\u5230\u65e7\u5e93\u5b58\u503c\uff0c\u5e76\u4e0b\u5355\u3002\u5c31\u4f1a\u51fa\u73b0\u4e0b\u5355\u6570\u91cf\uff1e\u5b9e\u9645\u5e93\u5b58\u91cf\uff0c\u5bfc\u81f4\u8d85\u5356<\/p>\n

    \u6240\u4ee5\uff0c\u8981\u5728Redis\u8fdb\u884c\u5e93\u5b58\u6263\u51cf\uff1a<\/p>\n

      \n
    • \u5f53\u5e93\u5b58\u67e5\u9a8c\u5b8c\u6210\u540e\uff0c\u4e00\u65e6\u5e93\u5b58\u6709\u4f59\u91cf\uff0c\u7acb\u5373\u5728Redis\u6263\u5e93\u5b58<\/li>\n
    • \u4e3a\u907f\u514d\u8bf7\u6c42\u67e5\u8be2\u5230\u65e7\u5e93\u5b58\u503c\uff0c\u5e93\u5b58\u67e5\u9a8c\u3001\u5e93\u5b58\u6263\u51cf\u4e24\u4e2a\u64cd\u4f5c\u9700\u4fdd\u8bc1\u539f\u5b50\u6027<\/li>\n<\/ul>\n

      \u79d2\u6740\u4e2d\u9700\u8981Redis\u53c2\u4e0e\u7684\u4e24\u4e2a\u73af\u8282\uff1a<\/p>\n

      <\/p>\n

      2.3 \u79d2\u6740\u7ed3\u675f\u540e<\/h3>\n

      \u8be5\u9636\u6bb5\uff0c\u53ef\u80fd\u8fd8\u6709\u90e8\u5206\u7528\u6237\u5237\u65b0\u5546\u54c1\u8be6\u60c5\u9875\uff0c\u5c1d\u8bd5\u7b49\u5f85\u6709\u5176\u4ed6\u7528\u6237\u9000\u5355\u3002\u800c\u5df2\u6210\u529f\u4e0b\u5355\u7684\u7528\u6237\u4f1a\u5237\u65b0\u8ba2\u5355\u8be6\u60c5\uff0c\u8ddf\u8e2a\u8ba2\u5355\u8fdb\u5ea6\u3002
      \u4e0d\u8fc7\uff0c\u6b64\u9636\u6bb5\u7684\u7528\u6237\u8bf7\u6c42\u91cf\u5df2\u4e0b\u964d\u5f88\u591a\uff0c\u670d\u52a1\u5668\u7aef\u4e00\u822c\u90fd\u80fd\u652f\u6491\u3002<\/p>\n

      3 Redis\u53ef\u652f\u6491\u79d2\u6740\u7684\u7279\u6027<\/h2>\n

      3.1 \u652f\u6301\u9ad8\u5e76\u53d1<\/h3>\n

      Redis\u5148\u5929\u652f\u6301\u3002\u4e14\u82e5\u6709\u591a\u4e2a\u79d2\u6740\u5546\u54c1\uff0c\u4e5f\u53ef\u4f7f\u7528\u5207\u7247\u96c6\u7fa4\uff0c\u7528\u4e0d\u540c\u5b9e\u4f8b\u4fdd\u5b58\u4e0d\u540c\u5546\u54c1\u7684\u5e93\u5b58\uff0c\u907f\u514d\u4f7f\u7528\u5355\u5b9e\u4f8b\u5bfc\u81f4\u6240\u6709\u79d2\u6740\u8bf7\u6c42\u90fd\u96c6\u4e2d\u5728\u4e00\u4e2a\u5b9e\u4f8b\u3002
      \u4f7f\u7528\u5207\u7247\u96c6\u7fa4\u65f6\uff0c\u5148CRC\u8ba1\u7b97\u4e0d\u540c\u79d2\u6740\u5546\u54c1K\u5bf9\u5e94Slot\uff0c\u7136\u540e\u5728\u5206\u914dSlot\u548c\u5b9e\u4f8b\u5bf9\u5e94\u5173\u7cfb\u65f6\uff0c\u624d\u80fd\u628a\u4e0d\u540c\u79d2\u6740\u5546\u54c1\u5bf9\u5e94\u7684Slot\u5206\u914d\u5230\u4e0d\u540c\u5b9e\u4f8b\u4fdd\u5b58\u3002<\/p>\n

      3.2 \u4fdd\u8bc1\u5e93\u5b58\u67e5\u9a8c\u548c\u5e93\u5b58\u6263\u51cf\u7684\u539f\u5b50\u6027<\/h3>\n

      \u4f7f\u7528Redis\u7684\u539f\u5b50\u64cd\u4f5c\u6216\u5206\u5e03\u5f0f\u9501\u3002<\/p>\n

      4 \u57fa\u4e8e\u539f\u5b50\u64cd\u4f5c\u652f\u6491\u79d2\u6740<\/h2>\n

      \u79d2\u6740\u4e2d\u7684\u4e00\u4e2a\u5546\u54c1\u7684\u5e93\u5b58\u5bf9\u5e94\u4e24\u4e2a\u4fe1\u606f\uff1a<\/p>\n

        \n
      • \u603b\u5e93\u5b58\u91cf<\/li>\n
      • \u5df2\u79d2\u6740\u91cf<\/li>\n<\/ul>\n

        \u8fd9\u79cd\u6570\u636e\u6a21\u578b\u6b63\u597d\u4e00\u4e2akey\uff08\u5546\u54c1ID\uff09\u5bf9\u5e94\u4e24\u4e2a\u5c5e\u6027\uff08\u603b\u5e93\u5b58\u91cf\u548c\u5df2\u79d2\u6740\u91cf\uff09\uff0c\u53ef\u7528Hash\u4fdd\u5b58\uff1a<\/p>\n

        key: itemID\nvalue: {total: N, ordered: M}\n<\/pre>\n
        itemID \u5546\u54c1\u7f16\u53f7total\uff0c\u603b\u5e93\u5b58\u91cfordered\uff0c\u5df2\u79d2\u6740\u91cf<\/p>\n
        \u56e0\u4e3a\u5e93\u5b58\u67e5\u9a8c\u3001\u5e93\u5b58\u6263\u51cf\u8fd9\u4e24\u4e2a\u64cd\u4f5c\u8981\u4fdd\u8bc1\u4e00\u8d77\u6267\u884c\uff0c\u4e00\u4e2a\u76f4\u63a5\u7684\u65b9\u6cd5\u5c31\u662f\u4f7f\u7528Redis\u7684\u539f\u5b50\u64cd\u4f5c\u3002<\/p>\n
        \u5e93\u5b58\u67e5\u9a8c\u3001\u5e93\u5b58\u6263\u51cf\u662f\u4e24\u4e2a\u64cd\u4f5c\uff0c\u9700Lua\u811a\u672c\u4fdd\u8bc1\u539f\u5b50\u6267\u884c\uff1a<\/p>\n
        #\u83b7\u53d6\u5546\u54c1\u5e93\u5b58\u4fe1\u606f            \nlocal counts = redis.call(\"HMGET\", KEYS[1], \"total\", \"ordered\");\n#\u5c06\u603b\u5e93\u5b58\u8f6c\u6362\u4e3a\u6570\u503c\nlocal total = tonumber(counts[1])\n#\u5c06\u5df2\u88ab\u79d2\u6740\u7684\u5e93\u5b58\u8f6c\u6362\u4e3a\u6570\u503c\nlocal ordered = tonumber(counts[2])  \n#\u5982\u679c\u5f53\u524d\u8bf7\u6c42\u7684\u5e93\u5b58\u91cf\u52a0\u4e0a\u5df2\u88ab\u79d2\u6740\u7684\u5e93\u5b58\u91cf\u4ecd\u7136\u5c0f\u4e8e\u603b\u5e93\u5b58\u91cf\uff0c\u5c31\u53ef\u4ee5\u66f4\u65b0\u5e93\u5b58         \nif ordered + k \n
        \u7136\u540e\u5c31\u80fd\u5728Redis\u5ba2\u6237\u7aef\uff0c\u4f7f\u7528EVAL\u547d\u4ee4\u6267\u884c\u811a\u672c\u3002\u5ba2\u6237\u7aef\u6839\u636e\u811a\u672c\u8fd4\u56de\u503c\uff0c\u786e\u5b9a\u79d2\u6740\u662f\u5426\u6210\u529f\uff1a<\/p>\n<\/pre>\n
          \n
        • \u8fd4\u56de\u503ck\uff0c\u6210\u529f<\/li>\n
        • 0\uff0c\u5931\u8d25<\/li>\n<\/ul>\n
          5 \u57fa\u4e8e\u5206\u5e03\u5f0f\u9501\u652f\u6491\u79d2\u6740<\/h2>\n
          \u8ba9\u5ba2\u6237\u7aef\u5411Redis\u7533\u8bf7\u5206\u5e03\u5f0f\u9501\uff0c\u62ff\u5230\u9501\u7684\u5ba2\u6237\u7aef\u624d\u80fd\u6267\u884c\u5e93\u5b58\u67e5\u9a8c\u3001\u5e93\u5b58\u6263\u51cf\u3002
          \u8fd9\u6837\u5927\u91cf\u79d2\u6740\u8bf7\u6c42\u5c31\u4f1a\u5728\u4e89\u593a\u5206\u5e03\u5f0f\u9501\u65f6\u88ab\u8fc7\u6ee4\u6389\u3002
          \u5e93\u5b58\u67e5\u9a8c\u3001\u6263\u51cf\u4e5f\u4e0d\u7528\u539f\u5b50\u64cd\u4f5c\u4e86\uff0c\u56e0\u4e3a\u591a\u4e2a\u5e76\u53d1\u5ba2\u6237\u7aef\u53ea\u6709\u4e00\u4e2a\u5ba2\u6237\u7aef\u80fd\u591f\u62ff\u5230\u9501\uff0c\u5df2\u4fdd\u8bc1\u5ba2\u6237\u7aef\u5e76\u53d1\u8bbf\u95ee\u7684\u4e92\u65a5\u6027\u3002<\/p>\n
          \/\/ \u4f7f\u7528\u5546\u54c1ID\u4f5c\u4e3akey\nkey = itemID\n\/\/ \u4f7f\u7528\u5ba2\u6237\u7aef\u552f\u4e00\u6807\u8bc6\u4f5c\u4e3avalue\nval = clientUniqueID\n\/\/\u7533\u8bf7\u5206\u5e03\u5f0f\u9501\uff0cTimeout\u662f\u8d85\u65f6\u65f6\u95f4\nlock =acquireLock(key, val, Timeout)\n\/\/\u5f53\u62ff\u5230\u9501\u540e\uff0c\u624d\u80fd\u8fdb\u884c\u5e93\u5b58\u67e5\u9a8c\u548c\u6263\u51cf\nif(lock == True) {\n   \/\/\u5e93\u5b58\u67e5\u9a8c\u548c\u6263\u51cf\n   availStock = DECR(key, k)\n   \/\/\u5e93\u5b58\u5df2\u7ecf\u6263\u51cf\u5b8c\u4e86\uff0c\u91ca\u653e\u9501\uff0c\u8fd4\u56de\u79d2\u6740\u5931\u8d25\n   if (availStock \n
          \u4f7f\u7528\u5206\u5e03\u5f0f\u9501\u65f6\uff0c\u5ba2\u6237\u7aef\u8981\u5148\u5411Redis\u8bf7\u6c42\u9501\uff0c\u53ea\u6709\u8bf7\u6c42\u5230\u9501\uff0c\u624d\u80fd\u8fdb\u884c\u5e93\u5b58\u67e5\u9a8c\u7b49\u64cd\u4f5c\uff0c\u8fd9\u6837\u5ba2\u6237\u7aef\u5728\u4e89\u62a2\u5206\u5e03\u5f0f\u9501\u65f6\uff0c\u5927\u90e8\u5206\u79d2\u6740\u8bf7\u6c42\u672c\u8eab\u5c31\u4f1a\u56e0\u4e3a\u62a2\u4e0d\u5230\u9501\u800c\u88ab\u62e6\u622a\u3002<\/p>\n
          \u63a8\u8350\u4f7f\u7528\u5207\u7247\u96c6\u7fa4\u4e2d\u7684\u4e0d\u540c\u5b9e\u4f8b\u6765\u5206\u522b\u4fdd\u5b58\u5206\u5e03\u5f0f\u9501\u548c\u5546\u54c1\u5e93\u5b58\u4fe1\u606f\u3002\u79d2\u6740\u8bf7\u6c42\u4f1a\u5148\u8bbf\u95ee\u4fdd\u5b58\u5206\u5e03\u5f0f\u9501\u7684\u5b9e\u4f8b\u3002\u82e5\u5ba2\u6237\u7aef\u6ca1\u62ff\u5230\u9501\uff0c\u8fd9\u4e9b\u5ba2\u6237\u7aef\u5c31\u4e0d\u4f1a\u67e5\u8be2\u5546\u54c1\u5e93\u5b58\uff0c\u51cf\u8f7b\u4fdd\u5b58\u5e93\u5b58\u4fe1\u606f\u7684\u5b9e\u4f8b\u7684\u538b\u529b\u3002<\/p>\n
          6 \u603b\u7ed3<\/h2>\n
          \u79d2\u6740\u7cfb\u7edf\u662f\u4e2a\u7cfb\u7edf\u6027\u5de5\u7a0b\uff0cRedis\u5b9e\u73b0\u5bf9\u5e93\u5b58\u67e5\u9a8c\u3001\u6263\u51cf\u73af\u8282\u7684\u652f\u6491\u3002<\/p>\n
          \u6b64\u5916\uff0c\u8fd8\u6709\u73af\u8282\u9700\u8981\u5904\u7406\uff1a<\/p>\n
          \u524d\u7aef\u9759\u6001\u9875\u9762\u7684\u8bbe\u8ba1<\/strong><\/p>\n
          \u79d2\u6740\u9875\u9762\u4e0a\u80fd\u9759\u6001\u5316\u5904\u7406\u7684\u9875\u9762\u5143\u7d20\uff0c\u8981\u5c3d\u91cf\u9759\u6001\u5316\uff0c\u5145\u5206\u5229\u7528CDN\u6216\u6d4f\u89c8\u5668\u7f13\u5b58\u670d\u52a1\u79d2\u6740\u5f00\u59cb\u524d\u7684\u8bf7\u6c42<\/p>\n
          \u8bf7\u6c42\u62e6\u622a\u548c\u6d41\u63a7<\/strong><\/p>\n
          \u5728\u79d2\u6740\u7cfb\u7edf\u7684\u63a5\u5165\u5c42\uff0c\u5bf9\u6076\u610f\u8bf7\u6c42\u8fdb\u884c\u62e6\u622a\uff0c\u907f\u514d\u5bf9\u7cfb\u7edf\u7684\u6076\u610f\u653b\u51fb\uff0c\u4f8b\u5982\u4f7f\u7528\u9ed1\u540d\u5355\u7981\u6b62\u6076\u610fIP\u8fdb\u884c\u8bbf\u95ee\u3002\u5982\u679cRedis\u5b9e\u4f8b\u7684\u8bbf\u95ee\u538b\u529b\u8fc7\u5927\uff0c\u4e3a\u4e86\u907f\u514d\u5b9e\u4f8b\u5d29\u6e83\uff0c\u6211\u4eec\u4e5f\u9700\u8981\u5728\u63a5\u5165\u5c42\u8fdb\u884c\u9650\u6d41\uff0c\u63a7\u5236\u8fdb\u5165\u79d2\u6740\u7cfb\u7edf\u7684\u8bf7\u6c42\u6570\u91cf\u3002<\/p>\n
          \u5e93\u5b58\u4fe1\u606f\u8fc7\u671f\u65f6\u95f4\u5904\u7406<\/strong><\/p>\n
          Redis\u4e2d\u4fdd\u5b58\u7684\u5e93\u5b58\u4fe1\u606f\u5176\u5b9e\u662f\u6570\u636e\u5e93\u7684\u7f13\u5b58\uff0c\u4e3a\u4e86\u907f\u514d\u7f13\u5b58\u51fb\u7a7f\u95ee\u9898\uff0c\u4e0d\u8981\u7ed9\u5e93\u5b58\u4fe1\u606f\u8bbe\u7f6e\u8fc7\u671f\u65f6\u95f4\u3002
          \u6570\u636e\u5e93\u8ba2\u5355\u5f02\u5e38\u5904\u7406\u3002\u5982\u679c\u6570\u636e\u5e93\u6ca1\u80fd\u6210\u529f\u5904\u7406\u8ba2\u5355\uff0c\u53ef\u4ee5\u589e\u52a0\u8ba2\u5355\u91cd\u8bd5\u529f\u80fd\uff0c\u4fdd\u8bc1\u8ba2\u5355\u6700\u7ec8\u80fd\u88ab\u6210\u529f\u5904\u7406\u3002<\/p>\n
          \u8d44\u6e90\u9694\u79bb<\/strong><\/p>\n
          \u79d2\u6740\u6d3b\u52a8\u5e26\u6765\u7684\u8bf7\u6c42\u6d41\u91cf\u5de8\u5927\uff0c\u6211\u4eec\u9700\u8981\u628a\u79d2\u6740\u5546\u54c1\u7684\u5e93\u5b58\u4fe1\u606f\u7528\u5355\u72ec\u7684\u5b9e\u4f8b\u4fdd\u5b58\uff0c\u800c\u4e0d\u8981\u548c\u65e5\u5e38\u4e1a\u52a1\u7cfb\u7edf\u7684\u6570\u636e\u4fdd\u5b58\u5728\u540c\u4e00\u4e2a\u5b9e\u4f8b\u4e0a\uff0c\u8fd9\u6837\u53ef\u4ee5\u907f\u514d\u5e72\u6270\u4e1a\u52a1\u7cfb\u7edf\u7684\u6b63\u5e38\u8fd0\u884c\u3002<\/p>\n<\/pre>\n","protected":false},"excerpt":{"rendered":"
          \u6d45\u8c08Redis\u5728\u79d2\u6740\u573a\u666f\u7684\u4f5c\u7528 ...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-201602","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/201602","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=201602"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/201602\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=201602"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=201602"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=201602"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}