{"id":4273,"date":"2020-04-13T18:45:09","date_gmt":"2020-04-13T10:45:09","guid":{"rendered":"https:\/\/damogame.cn\/wordpress\/?p=4273"},"modified":"2020-04-13T18:45:09","modified_gmt":"2020-04-13T10:45:09","slug":"%e5%a6%82%e4%bd%95%e6%ad%a3%e7%a1%ae%e5%ae%9e%e7%8e%b0redis%e5%88%86%e5%b8%83%e5%bc%8f%e9%94%81","status":"publish","type":"post","link":"https:\/\/i007.cc\/wordpress\/archives\/4273","title":{"rendered":"\u5982\u4f55\u6b63\u786e\u5b9e\u73b0Redis\u5206\u5e03\u5f0f\u9501"},"content":{"rendered":"

\u539f\u6587\u5730\u5740<\/a><\/p>\n

 <\/p>\n

Java\u6280\u672f\u67b6\u6784\u00a02018-05-24 07:10:00<\/div>\n
\n
\n

\u70b9\u51fb\u4e0a\u65b9”java\u5168\u6808\u6280\u672f”\u5173\u6ce8\uff0c\u6bcf\u5929\u5b66\u4e60\u4e00\u4e2ajava\u77e5\u8bc6\u70b9<\/strong><\/p><\/blockquote>\n

\n

\u5206\u5e03\u5f0f\u9501\u7684\u5b9e\u73b0\u65b9\u5f0f\u4e00\u822c\u6709\u4e09\u79cd\uff1a<\/p>\n

    \n
  1. \u6570\u636e\u5e93\u4e50\u89c2\u9501<\/li>\n
  2. \u57fa\u4e8eRedis\u7684\u5206\u5e03\u5f0f\u9501<\/li>\n
  3. \u57fa\u4e8eZooKeeper\u7684\u5206\u5e03\u5f0f\u9501<\/li>\n<\/ol>\n

    \u672c\u7bc7\u5c06\u4ecb\u7ecd\u7b2c\u4e8c\u79cd\u65b9\u5f0f\uff0c\u57fa\u4e8eRedis\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\uff0c\u8bd5\u56fe\u63d0\u4f9b\u4e00\u4e2a\u4f7f\u7528Redis\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\u7684\u89c4\u8303\u7b97\u6cd5\u3002<\/p>\n

    \n
    \n
    \"\u300c\u6bcf\u5929\u4e00\u4e2a\u77e5\u8bc6\u70b9\u300d\u5982\u4f55\u6b63\u786e\u5b9e\u73b0Redis\u5206\u5e03\u5f0f\u9501\"<\/div>\n<\/div>\n
    \n

    redis\u547d\u4ee4\uff1aSETNX key value<\/p>\n

    \u5c06 key \u7684\u503c\u8bbe\u4e3a value \uff0c\u5f53\u4e14\u4ec5\u5f53 key \u4e0d\u5b58\u5728\u3002\u82e5\u7ed9\u5b9a\u7684 key \u5df2\u7ecf\u5b58\u5728\uff0c\u5219SETNX\u4e0d\u505a\u4efb\u4f55\u52a8\u4f5c\u3002<\/p>\n

    SETNX \u662f\u300eSET if Not eXists\u300f(\u5982\u679c\u4e0d\u5b58\u5728\uff0c\u5219 SET)\u7684\u7b80\u5199\u3002<\/p>\n

    \u65f6\u95f4\u590d\u6742\u5ea6\uff1a<\/strong>O(1)\u3002\u8fd4\u56de\u503c\uff1a<\/strong>\u8bbe\u7f6e\u6210\u529f\uff0c\u8fd4\u56de 1 \u3002\u8bbe\u7f6e\u5931\u8d25\uff0c\u8fd4\u56de 0 \u3002<\/p><\/blockquote>\n

    \u5b89\u5168\u548c\u6d3b\u6027\u5931\u6548\u4fdd\u969c<\/strong><\/p>\n

    \u4e3a\u4e86\u786e\u4fdd\u5206\u5e03\u5f0f\u9501\u53ef\u7528\uff0c\u81f3\u5c11\u8981\u786e\u4fdd\u9501\u7684\u5b9e\u73b0\u6ee1\u8db3\u4ee5\u4e0b\u4e09\u4e2a\u7279\u6027\uff1a<\/p>\n

      \n
    1. \u5b89\u5168\u5c5e\u6027\uff08Safety property\uff09: \u72ec\u4eab\uff08\u76f8\u4e92\u6392\u65a5\uff09\u3002\u5728\u4efb\u610f\u4e00\u4e2a\u65f6\u523b\uff0c\u53ea\u6709\u4e00\u4e2a\u5ba2\u6237\u7aef\u6301\u6709\u9501\u3002<\/li>\n
    2. \u6d3b\u6027A(Liveness property A): \u65e0\u6b7b\u9501\u3002\u5373\u4fbf\u6301\u6709\u9501\u7684\u5ba2\u6237\u7aef\u5d29\u6e83\uff08crashed)\u6216\u8005\u7f51\u7edc\u88ab\u5206\u88c2\uff08gets partitioned)\uff0c\u9501\u4ecd\u7136\u53ef\u4ee5\u88ab\u83b7\u53d6\u3002<\/li>\n
    3. \u6d3b\u6027B(Liveness property B): \u5bb9\u9519\u3002 \u53ea\u8981\u5927\u90e8\u5206Redis\u8282\u70b9\u90fd\u6d3b\u7740\uff0c\u5ba2\u6237\u7aef\u5c31\u53ef\u4ee5\u83b7\u53d6\u548c\u91ca\u653e\u9501.<\/li>\n<\/ol>\n

      \u4e3a\u4ec0\u4e48\u57fa\u4e8e\u6545\u969c\u8f6c\u79fb\u7684\u5b9e\u73b0\u8fd8\u4e0d\u591f<\/strong><\/p>\n

      \u4e3a\u4e86\u66f4\u597d\u7684\u7406\u89e3\u53ef\u4ee5\u6539\u8fdb\u7684\u65b9\u9762\uff0c\u6211\u4eec\u5148\u5206\u6790\u4e00\u4e0b\u5f53\u524d\u5927\u591a\u6570\u57fa\u4e8eRedis\u7684\u5206\u5e03\u5f0f\u9501\u73b0\u72b6\u548c\u5b9e\u73b0\u65b9\u6cd5.<\/p>\n

      \u5b9e\u73b0Redis\u5206\u5e03\u5f0f\u9501\u7684\u6700\u7b80\u5355\u7684\u65b9\u6cd5\u5c31\u662f\u5728Redis\u4e2d\u521b\u5efa\u4e00\u4e2akey\uff0c\u8fd9\u4e2akey\u6709\u4e00\u4e2a\u5931\u6548\u65f6\u95f4\uff08TTL)\uff0c\u4ee5\u4fdd\u8bc1\u9501\u6700\u7ec8\u4f1a\u88ab\u81ea\u52a8\u91ca\u653e\u6389\uff08\u8fd9\u4e2a\u5bf9\u5e94\u7279\u60272\uff09\u3002\u5f53\u5ba2\u6237\u7aef\u91ca\u653e\u8d44\u6e90(\u89e3\u9501\uff09\u7684\u65f6\u5019\uff0c\u4f1a\u5220\u9664\u6389\u8fd9\u4e2akey\u3002<\/p>\n

      \u4ece\u8868\u9762\u4e0a\u770b\uff0c\u4f3c\u4e4e\u6548\u679c\u8fd8\u4e0d\u9519\uff0c\u4f46\u662f\u8fd9\u91cc\u6709\u4e00\u4e2a\u95ee\u9898\uff1a\u8fd9\u4e2a\u67b6\u6784\u4e2d\u5b58\u5728\u4e00\u4e2a\u4e25\u91cd\u7684\u5355\u70b9\u5931\u8d25\u95ee\u9898\u3002\u5982\u679cRedis\u6302\u4e86\u600e\u4e48\u529e\uff1f\u4f60\u53ef\u80fd\u4f1a\u8bf4\uff0c\u53ef\u4ee5\u901a\u8fc7\u589e\u52a0\u4e00\u4e2aslave\u8282\u70b9\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\u3002\u4f46\u8fd9\u901a\u5e38\u662f\u884c\u4e0d\u901a\u7684\u3002\u8fd9\u6837\u505a\uff0c\u6211\u4eec\u4e0d\u80fd\u5b9e\u73b0\u8d44\u6e90\u7684\u72ec\u4eab,\u56e0\u4e3aRedis\u7684\u4e3b\u4ece\u540c\u6b65\u901a\u5e38\u662f\u5f02\u6b65\u7684\u3002<\/p>\n

      \u5728\u8fd9\u79cd\u573a\u666f\uff08\u4e3b\u4ece\u7ed3\u6784\uff09\u4e2d\u5b58\u5728\u660e\u663e\u7684\u7ade\u6001:<\/p>\n

        \n
      1. \u5ba2\u6237\u7aefA\u4ecemaster\u83b7\u53d6\u5230\u9501<\/li>\n
      2. \u5728master\u5c06\u9501\u540c\u6b65\u5230slave\u4e4b\u524d\uff0cmaster\u5b95\u6389\u4e86\u3002<\/li>\n
      3. slave\u8282\u70b9\u88ab\u664b\u7ea7\u4e3amaster\u8282\u70b9<\/li>\n
      4. \u5ba2\u6237\u7aefB\u53d6\u5f97\u4e86\u540c\u4e00\u4e2a\u8d44\u6e90\u88ab\u5ba2\u6237\u7aefA\u5df2\u7ecf\u83b7\u53d6\u5230\u7684\u53e6\u5916\u4e00\u4e2a\u9501\u3002\u5b89\u5168\u5931\u6548\uff01<\/strong><\/li>\n<\/ol>\n

        \u6709\u65f6\u5019\u7a0b\u5e8f\u5c31\u662f\u8fd9\u4e48\u5de7\uff0c\u6bd4\u5982\u8bf4\u6b63\u597d\u4e00\u4e2a\u8282\u70b9\u6302\u6389\u7684\u65f6\u5019\uff0c\u591a\u4e2a\u5ba2\u6237\u7aef\u540c\u65f6\u53d6\u5230\u4e86\u9501\u3002\u5982\u679c\u4f60\u53ef\u4ee5\u63a5\u53d7\u8fd9\u79cd\u5c0f\u6982\u7387\u9519\u8bef\uff0c\u90a3\u7528\u8fd9\u4e2a\u57fa\u4e8e\u590d\u5236\u7684\u65b9\u6848\u5c31\u5b8c\u5168\u6ca1\u6709\u95ee\u9898\u3002\u5426\u5219\u7684\u8bdd\uff0c\u6211\u4eec\u5efa\u8bae\u4f60\u5b9e\u73b0\u4e0b\u9762\u63cf\u8ff0\u7684\u89e3\u51b3\u65b9\u6848\u3002<\/p>\n

        \u5355Redis\u5b9e\u4f8b\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\u7684\u6b63\u786e\u65b9\u6cd5<\/strong><\/p>\n

        \u5728\u5c1d\u8bd5\u514b\u670d\u4e0a\u8ff0\u5355\u5b9e\u4f8b\u8bbe\u7f6e\u7684\u9650\u5236\u4e4b\u524d\uff0c\u8ba9\u6211\u4eec\u5148\u8ba8\u8bba\u4e00\u4e0b\u5728\u8fd9\u79cd\u7b80\u5355\u60c5\u51b5\u4e0b\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\u7684\u6b63\u786e\u505a\u6cd5\uff0c\u5b9e\u9645\u4e0a\u8fd9\u662f\u4e00\u79cd\u53ef\u884c\u7684\u65b9\u6848\uff0c\u5c3d\u7ba1\u5b58\u5728\u7ade\u6001\uff0c\u7ed3\u679c\u4ecd\u7136\u662f\u53ef\u63a5\u53d7\u7684\uff0c\u53e6\u5916\uff0c\u8fd9\u91cc\u8ba8\u8bba\u7684\u5355\u5b9e\u4f8b\u52a0\u9501\u65b9\u6cd5\u4e5f\u662f\u5206\u5e03\u5f0f\u52a0\u9501\u7b97\u6cd5\u7684\u57fa\u7840\u3002<\/p>\n

        \u83b7\u53d6\u9501<\/strong>\u4f7f\u7528\u547d\u4ee4:<\/p>\n

        SET resource_name my_random_value NX PX 30000<\/p><\/blockquote>\n

        \u8fd9\u4e2a\u547d\u4ee4\u4ec5\u5728\u4e0d\u5b58\u5728key\u7684\u65f6\u5019\u624d\u80fd\u88ab\u6267\u884c\u6210\u529f\uff08NX\u9009\u9879\uff09\uff0c\u5e76\u4e14\u8fd9\u4e2akey\u6709\u4e00\u4e2a30\u79d2\u7684\u81ea\u52a8\u5931\u6548\u65f6\u95f4\uff08PX\u5c5e\u6027\uff09\u3002\u8fd9\u4e2akey\u7684\u503c\u662f\u201cmy_random_value\u201d(\u4e00\u4e2a\u968f\u673a\u503c\uff09\uff0c\u8fd9\u4e2a\u503c\u5728\u6240\u6709\u7684\u5ba2\u6237\u7aef\u5fc5\u987b\u662f\u552f\u4e00\u7684\uff0c\u6240\u6709\u540c\u4e00key\u7684\u83b7\u53d6\u8005\uff08\u7ade\u4e89\u8005\uff09\u8fd9\u4e2a\u503c\u90fd\u4e0d\u80fd\u4e00\u6837\u3002value\u7684\u503c\u5fc5\u987b\u662f\u968f\u673a\u6570\u4e3b\u8981\u662f\u4e3a\u4e86\u66f4\u5b89\u5168\u7684\u91ca\u653e\u9501\uff08java\u4e2d\u53ef\u4ee5\u4f7f\u7528UUID.randomUUID().toString()\u65b9\u6cd5\u751f\u6210\uff09\u3002<\/p>\n

        \u5bf9\u5e94java\u5b9e\u73b0\uff1a<\/p>\n

        \n
        \"\u300c\u6bcf\u5929\u4e00\u4e2a\u77e5\u8bc6\u70b9\u300d\u5982\u4f55\u6b63\u786e\u5b9e\u73b0Redis\u5206\u5e03\u5f0f\u9501\"<\/div>\n<\/div>\n

        \u91ca\u653e\u9501<\/strong>\u7684\u65f6\u5019\u4f7f\u7528\u811a\u672c\u544a\u8bc9Redis:\u53ea\u6709key\u5b58\u5728\u5e76\u4e14\u5b58\u50a8\u7684\u503c\u548c\u6211\u6307\u5b9a\u7684\u503c\u4e00\u6837\u624d\u80fd\u544a\u8bc9\u6211\u5220\u9664\u6210\u529f\u3002<\/p>\n

        \u901a\u8fc7\u4ee5\u4e0bLua\u811a\u672c\u5b9e\u73b0\uff1a<\/p>\n

        \n
        \"\u300c\u6bcf\u5929\u4e00\u4e2a\u77e5\u8bc6\u70b9\u300d\u5982\u4f55\u6b63\u786e\u5b9e\u73b0Redis\u5206\u5e03\u5f0f\u9501\"<\/div>\n<\/div>\n

        \u4f7f\u7528\u8fd9\u79cd\u65b9\u5f0f\u91ca\u653e\u9501\u53ef\u4ee5\u907f\u514d\u5220\u9664\u522b\u7684\u5ba2\u6237\u7aef\u83b7\u53d6\u6210\u529f\u7684\u9501\u3002<\/p>\n

        \u4e3e\u4e2a\u4f8b\u5b50\uff1a\u5ba2\u6237\u7aefA\u53d6\u5f97\u8d44\u6e90\u9501\uff0c\u4f46\u662f\u7d27\u63a5\u7740\u88ab\u4e00\u4e2a\u5176\u4ed6\u64cd\u4f5c\u963b\u585e\u4e86\uff0c\u5f53\u5ba2\u6237\u7aefA\u8fd0\u884c\u5b8c\u6bd5\u5176\u4ed6\u64cd\u4f5c\u540e\u8981\u91ca\u653e\u9501\u65f6\uff0c\u539f\u6765\u7684\u9501\u65e9\u5df2\u8d85\u65f6\u5e76\u4e14\u88abRedis\u81ea\u52a8\u91ca\u653e\uff0c\u5e76\u4e14\u5728\u8fd9\u671f\u95f4\u8d44\u6e90\u9501\u53c8\u88ab\u5ba2\u6237\u7aefB\u518d\u6b21\u83b7\u53d6\u5230\u3002\u5982\u679c\u4ec5\u4f7f\u7528DEL\u547d\u4ee4\u5c06key\u5220\u9664\uff0c\u90a3\u4e48\u8fd9\u79cd\u60c5\u51b5\u5c31\u4f1a\u628a\u5ba2\u6237\u7aefB\u7684\u9501\u7ed9\u5220\u9664\u6389\u3002\u4f7f\u7528Lua\u811a\u672c\u5c31\u4e0d\u4f1a\u5b58\u5728\u8fd9\u79cd\u60c5\u51b5\uff0c\u56e0\u4e3a\u811a\u672c\u4ec5\u4f1a\u5220\u9664value\u7b49\u4e8e\u5ba2\u6237\u7aefA\u7684value\u7684key\uff08value\u76f8\u5f53\u4e8e\u5ba2\u6237\u7aef\u7684\u4e00\u4e2a\u7b7e\u540d\uff09\u3002<\/p>\n

        key\u7684\u5931\u6548\u65f6\u95f4\uff0c\u88ab\u79f0\u4f5c\u201c\u9501\u5b9a\u6709\u6548\u671f\u201d\u3002\u5b83\u4e0d\u4ec5\u662fkey\u81ea\u52a8\u5931\u6548\u65f6\u95f4\uff0c\u800c\u4e14\u8fd8\u662f\u4e00\u4e2a\u5ba2\u6237\u7aef\u6301\u6709\u9501\u591a\u957f\u65f6\u95f4\u540e\u53ef\u4ee5\u88ab\u53e6\u5916\u4e00\u4e2a\u5ba2\u6237\u7aef\u91cd\u65b0\u83b7\u5f97\u3002<\/p>\n

        \u5bf9\u5e94java\u5b9e\u73b0\uff1a<\/p>\n

        \n
        \"\u300c\u6bcf\u5929\u4e00\u4e2a\u77e5\u8bc6\u70b9\u300d\u5982\u4f55\u6b63\u786e\u5b9e\u73b0Redis\u5206\u5e03\u5f0f\u9501\"<\/div>\n<\/div>\n

        \u7b2c\u4e8c\u884c\u4ee3\u7801\uff0c\u6211\u4eec\u5c06Lua\u4ee3\u7801\u4f20\u5230jedis.eval()\u65b9\u6cd5\u91cc\uff0c\u5e76\u4f7f\u53c2\u6570KEYS[1]\u8d4b\u503c\u4e3alockKey\uff0cARGV[1]\u8d4b\u503c\u4e3arequestId\u3002eval()\u65b9\u6cd5\u662f\u5c06Lua\u4ee3\u7801\u4ea4\u7ed9Redis\u670d\u52a1\u7aef\u6267\u884c\u3002<\/p>\n

        \u4e3a\u4ec0\u4e48\u8981\u4f7f\u7528Lua\u8bed\u8a00\u6765\u5b9e\u73b0\u3002\u56e0\u4e3a\u8981\u786e\u4fdd\u4e0a\u8ff0\u64cd\u4f5c\u662f\u539f\u5b50\u6027\u7684\u3002<\/p>\n

        \u90a3\u4e48\u4e3a\u4ec0\u4e48\u6267\u884ceval()\u65b9\u6cd5\u53ef\u4ee5\u786e\u4fdd\u539f\u5b50\u6027\u3002\u6e90\u4e8eRedis\u7684\u7279\u6027\uff0c\u4e0b\u9762\u662f\u5b98\u7f51\u5bf9eval\u547d\u4ee4\u7684\u90e8\u5206\u89e3\u91ca\uff1a<\/p>\n

        \n
        \"\u300c\u6bcf\u5929\u4e00\u4e2a\u77e5\u8bc6\u70b9\u300d\u5982\u4f55\u6b63\u786e\u5b9e\u73b0Redis\u5206\u5e03\u5f0f\u9501\"<\/div>\n<\/div>\n

        \u7b80\u5355\u6765\u8bf4\uff0c\u5c31\u662f\u5728eval\u547d\u4ee4\u6267\u884cLua\u4ee3\u7801\u7684\u65f6\u5019\uff0cLua\u4ee3\u7801\u5c06\u88ab\u5f53\u6210\u4e00\u4e2a\u547d\u4ee4\u53bb\u6267\u884c\uff0c\u5e76\u4e14\u76f4\u5230eval\u547d\u4ee4\u6267\u884c\u5b8c\u6210\uff0cRedis\u624d\u4f1a\u6267\u884c\u5176\u4ed6\u547d\u4ee4\u3002<\/p>\n

        \u622a\u81f3\u5230\u76ee\u524d\uff0c\u6211\u4eec\u5df2\u7ecf\u6709\u8f83\u597d\u7684\u65b9\u6cd5\u83b7\u53d6\u9501\u548c\u91ca\u653e\u9501\u3002\u57fa\u4e8eRedis\u5355\u5b9e\u4f8b\uff0c\u5047\u8bbe\u8fd9\u4e2a\u5355\u5b9e\u4f8b\u603b\u662f\u53ef\u7528\uff0c\u8fd9\u79cd\u65b9\u6cd5\u5df2\u7ecf\u8db3\u591f\u5b89\u5168<\/strong>\u3002<\/p>\n

        \n

        \u73b0\u5728\u8ba9\u6211\u4eec\u6269\u5c55<\/strong>\u4e00\u4e0b\uff0c\u5047\u8bbeRedis\u6ca1\u6709\u603b\u662f\u53ef\u7528\u7684\u4fdd\u969c\u3002<\/p>\n

        Redlock\u7b97\u6cd5<\/strong><\/p>\n

        \u5728Redis\u7684\u5206\u5e03\u5f0f\u73af\u5883\u4e2d\uff0c\u6211\u4eec\u5047\u8bbe\u6709N\u4e2aRedis master\u3002\u8fd9\u4e9b\u8282\u70b9\u5b8c\u5168\u4e92\u76f8\u72ec\u7acb\uff0c\u4e0d\u5b58\u5728\u4e3b\u4ece\u590d\u5236\u6216\u8005\u5176\u4ed6\u96c6\u7fa4\u534f\u8c03\u673a\u5236\u3002\u4e4b\u524d\u6211\u4eec\u5df2\u7ecf\u63cf\u8ff0\u4e86\u5728Redis\u5355\u5b9e\u4f8b\u4e0b\u600e\u4e48\u5b89\u5168\u5730\u83b7\u53d6\u548c\u91ca\u653e\u9501\u3002\u6211\u4eec\u786e\u4fdd\u5c06\u5728\u6bcf\uff08N)\u4e2a\u5b9e\u4f8b\u4e0a\u4f7f\u7528\u6b64\u65b9\u6cd5\u83b7\u53d6\u548c\u91ca\u653e\u9501\u3002\u5728\u8fd9\u4e2a\u6837\u4f8b\u4e2d\uff0c\u6211\u4eec\u5047\u8bbe\u67095\u4e2aRedis master\u8282\u70b9\uff0c\u8fd9\u662f\u4e00\u4e2a\u6bd4\u8f83\u5408\u7406\u7684\u8bbe\u7f6e\uff0c\u6240\u4ee5\u6211\u4eec\u9700\u8981\u57285\u53f0\u673a\u5668\u4e0a\u9762\u6216\u80055\u53f0\u865a\u62df\u673a\u4e0a\u9762\u8fd0\u884c\u8fd9\u4e9b\u5b9e\u4f8b\uff0c\u8fd9\u6837\u4fdd\u8bc1\u4ed6\u4eec\u4e0d\u4f1a\u540c\u65f6\u90fd\u5b95\u6389\u3002<\/p>\n

        \u4e3a\u4e86\u53d6\u5230\u9501\uff0c\u5ba2\u6237\u7aef\u5e94\u8be5\u6267\u884c\u4ee5\u4e0b\u64cd\u4f5c:<\/p>\n

          \n
        1. \u83b7\u53d6\u5f53\u524dUnix\u65f6\u95f4\uff0c\u4ee5\u6beb\u79d2\u4e3a\u5355\u4f4d\u3002<\/li>\n
        2. \u4f9d\u6b21\u5c1d\u8bd5\u4eceN\u4e2a\u5b9e\u4f8b\uff0c\u4f7f\u7528\u76f8\u540c\u7684key\u548c\u968f\u673a\u503c\u83b7\u53d6\u9501\u3002\u5728\u6b65\u9aa42\uff0c\u5f53\u5411Redis\u8bbe\u7f6e\u9501\u65f6,\u5ba2\u6237\u7aef\u5e94\u8be5\u8bbe\u7f6e\u4e00\u4e2a\u7f51\u7edc\u8fde\u63a5\u548c\u54cd\u5e94\u8d85\u65f6\u65f6\u95f4\uff0c\u8fd9\u4e2a\u8d85\u65f6\u65f6\u95f4\u5e94\u8be5\u5c0f\u4e8e\u9501\u7684\u5931\u6548\u65f6\u95f4\u3002\u4f8b\u5982\u4f60\u7684\u9501\u81ea\u52a8\u5931\u6548\u65f6\u95f4\u4e3a10\u79d2\uff0c\u5219\u8d85\u65f6\u65f6\u95f4\u5e94\u8be5\u57285-50\u6beb\u79d2\u4e4b\u95f4\u3002\u8fd9\u6837\u53ef\u4ee5\u907f\u514d\u670d\u52a1\u5668\u7aefRedis\u5df2\u7ecf\u6302\u6389\u7684\u60c5\u51b5\u4e0b\uff0c\u5ba2\u6237\u7aef\u8fd8\u5728\u6b7b\u6b7b\u5730\u7b49\u5f85\u54cd\u5e94\u7ed3\u679c\u3002\u5982\u679c\u670d\u52a1\u5668\u7aef\u6ca1\u6709\u5728\u89c4\u5b9a\u65f6\u95f4\u5185\u54cd\u5e94\uff0c\u5ba2\u6237\u7aef\u5e94\u8be5\u5c3d\u5feb\u5c1d\u8bd5\u53e6\u5916\u4e00\u4e2aRedis\u5b9e\u4f8b\u3002<\/li>\n
        3. \u5ba2\u6237\u7aef\u4f7f\u7528\u5f53\u524d\u65f6\u95f4\u51cf\u53bb\u5f00\u59cb\u83b7\u53d6\u9501\u65f6\u95f4\uff08\u6b65\u9aa41\u8bb0\u5f55\u7684\u65f6\u95f4\uff09\u5c31\u5f97\u5230\u83b7\u53d6\u9501\u4f7f\u7528\u7684\u65f6\u95f4\u3002\u5f53\u4e14\u4ec5\u5f53\u4ece\u5927\u591a\u6570\uff08\u8fd9\u91cc\u662f3\u4e2a\u8282\u70b9\uff09\u7684Redis\u8282\u70b9\u90fd\u53d6\u5230\u9501\uff0c\u5e76\u4e14\u4f7f\u7528\u7684\u65f6\u95f4\u5c0f\u4e8e\u9501\u5931\u6548\u65f6\u95f4\u65f6\uff0c\u9501\u624d\u7b97\u83b7\u53d6\u6210\u529f\u3002<\/li>\n
        4. \u5982\u679c\u53d6\u5230\u4e86\u9501\uff0ckey\u7684\u771f\u6b63\u6709\u6548\u65f6\u95f4\u7b49\u4e8e\u6709\u6548\u65f6\u95f4\u51cf\u53bb\u83b7\u53d6\u9501\u6240\u4f7f\u7528\u7684\u65f6\u95f4\uff08\u6b65\u9aa43\u8ba1\u7b97\u7684\u7ed3\u679c\uff09\u3002<\/li>\n
        5. \u5982\u679c\u56e0\u4e3a\u67d0\u4e9b\u539f\u56e0\uff0c\u83b7\u53d6\u9501\u5931\u8d25\uff08\u6ca1\u6709\u5728\u81f3\u5c11N\/2+1\u4e2aRedis\u5b9e\u4f8b\u53d6\u5230\u9501\u6216\u8005\u53d6\u9501\u65f6\u95f4\u5df2\u7ecf\u8d85\u8fc7\u4e86\u6709\u6548\u65f6\u95f4\uff09\uff0c\u5ba2\u6237\u7aef\u5e94\u8be5\u5728\u6240\u6709\u7684Redis\u5b9e\u4f8b\u4e0a\u8fdb\u884c\u89e3\u9501\uff08\u5373\u4fbf\u67d0\u4e9bRedis\u5b9e\u4f8b\u6839\u672c\u5c31\u6ca1\u6709\u52a0\u9501\u6210\u529f\uff09\u3002<\/li>\n<\/ol>\n

          \u8fd9\u4e2a\u7b97\u6cd5\u662f\u5f02\u6b65\u7684\u4e48?<\/strong><\/p>\n

          \u7b97\u6cd5\u57fa\u4e8e\u8fd9\u6837\u4e00\u4e2a\u5047\u8bbe\uff1a\u867d\u7136\u591a\u4e2a\u8fdb\u7a0b\u4e4b\u95f4\u6ca1\u6709\u65f6\u949f\u540c\u6b65\uff0c\u4f46\u6bcf\u4e2a\u8fdb\u7a0b\u90fd\u4ee5\u76f8\u540c\u7684\u65f6\u949f\u9891\u7387\u524d\u8fdb\uff0c\u65f6\u95f4\u5dee\u76f8\u5bf9\u4e8e\u5931\u6548\u65f6\u95f4\u6765\u8bf4\u51e0\u4e4e\u53ef\u4ee5\u5ffd\u7565\u4e0d\u8ba1\u3002\u8fd9\u79cd\u5047\u8bbe\u548c\u6211\u4eec\u7684\u771f\u5b9e\u4e16\u754c\u975e\u5e38\u63a5\u8fd1\uff1a\u6bcf\u4e2a\u8ba1\u7b97\u673a\u90fd\u6709\u4e00\u4e2a\u672c\u5730\u65f6\u949f\uff0c\u6211\u4eec\u53ef\u4ee5\u5bb9\u5fcd\u591a\u4e2a\u8ba1\u7b97\u673a\u4e4b\u95f4\u6709\u8f83\u5c0f\u7684\u65f6\u949f\u6f02\u79fb\u3002<\/p>\n

          \u4ece\u8fd9\u70b9\u6765\u8bf4\uff0c\u6211\u4eec\u5fc5\u987b\u518d\u6b21\u5f3a\u8c03\u6211\u4eec\u7684\u4e92\u76f8\u6392\u65a5\u89c4\u5219\uff1a\u53ea\u6709\u5728\u9501\u7684\u6709\u6548\u65f6\u95f4\uff08\u5728\u6b65\u9aa43\u8ba1\u7b97\u7684\u7ed3\u679c\uff09\u8303\u56f4\u5185\u5ba2\u6237\u7aef\u80fd\u591f\u505a\u5b8c\u5b83\u7684\u5de5\u4f5c\uff0c\u9501\u7684\u5b89\u5168\u6027\u624d\u80fd\u5f97\u5230\u4fdd\u8bc1\uff08\u9501\u7684\u5b9e\u9645\u6709\u6548\u65f6\u95f4\u901a\u5e38\u8981\u6bd4\u8bbe\u7f6e\u7684\u77ed\uff0c\u56e0\u4e3a\u8ba1\u7b97\u673a\u4e4b\u95f4\u6709\u65f6\u949f\u6f02\u79fb\u7684\u73b0\u8c61\uff09\u3002.<\/p>\n

          \u5931\u8d25\u65f6\u91cd\u8bd5<\/strong><\/p>\n

          \u5f53\u5ba2\u6237\u7aef\u65e0\u6cd5\u53d6\u5230\u9501\u65f6\uff0c\u5e94\u8be5\u5728\u4e00\u4e2a\u968f\u673a\u5ef6\u8fdf\u540e\u91cd\u8bd5,\u9632\u6b62\u591a\u4e2a\u5ba2\u6237\u7aef\u5728\u540c\u65f6\u62a2\u593a\u540c\u4e00\u8d44\u6e90\u7684\u9501\uff08\u8fd9\u6837\u4f1a\u5bfc\u81f4\u8111\u88c2\uff0c\u6ca1\u6709\u4eba\u4f1a\u53d6\u5230\u9501\uff09\u3002\u540c\u6837\uff0c\u5ba2\u6237\u7aef\u53d6\u5f97\u5927\u90e8\u5206Redis\u5b9e\u4f8b\u9501\u6240\u82b1\u8d39\u7684\u65f6\u95f4\u8d8a\u77ed\uff0c\u8111\u88c2\u51fa\u73b0\u7684\u6982\u7387\u5c31\u4f1a\u8d8a\u4f4e\uff08\u5fc5\u8981\u7684\u91cd\u8bd5\uff09\uff0c\u6240\u4ee5\uff0c\u7406\u60f3\u60c5\u51b5\u4e00\u4e0b\uff0c\u5ba2\u6237\u7aef\u5e94\u8be5\u540c\u65f6\uff08\u5e76\u53d1\u5730\uff09\u5411\u6240\u6709Redis\u53d1\u9001SET\u547d\u4ee4\u3002<\/p>\n

          \u9700\u8981\u5f3a\u8c03\uff0c\u5f53\u5ba2\u6237\u7aef\u4ece\u5927\u591a\u6570Redis\u5b9e\u4f8b\u83b7\u53d6\u9501\u5931\u8d25\u65f6\uff0c\u5e94\u8be5\u5c3d\u5feb\u5730\u91ca\u653e\uff08\u90e8\u5206\uff09\u5df2\u7ecf\u6210\u529f\u53d6\u5230\u7684\u9501\uff0c\u8fd9\u6837\u5176\u4ed6\u7684\u5ba2\u6237\u7aef\u5c31\u4e0d\u5fc5\u975e\u5f97\u7b49\u5230\u9501\u8fc7\u5b8c\u201c\u6709\u6548\u65f6\u95f4\u201d\u624d\u80fd\u53d6\u5230\uff08\u7136\u800c\uff0c\u5982\u679c\u5df2\u7ecf\u5b58\u5728\u7f51\u7edc\u5206\u88c2\uff0c\u5ba2\u6237\u7aef\u5df2\u7ecf\u65e0\u6cd5\u548cRedis\u5b9e\u4f8b\u901a\u4fe1\uff0c\u6b64\u65f6\u5c31\u53ea\u80fd\u7b49\u5f85key\u7684\u81ea\u52a8\u91ca\u653e\u4e86\uff0c\u7b49\u4e8e\u88ab\u60e9\u7f5a\u4e86\uff09\u3002<\/p>\n

          \u91ca\u653e\u9501<\/strong><\/p>\n

          \u91ca\u653e\u9501\u6bd4\u8f83\u7b80\u5355\uff0c\u5411\u6240\u6709\u7684Redis\u5b9e\u4f8b\u53d1\u9001\u91ca\u653e\u9501\u547d\u4ee4\u5373\u53ef\uff0c\u4e0d\u7528\u5173\u5fc3\u4e4b\u524d\u6709\u6ca1\u6709\u4eceRedis\u5b9e\u4f8b\u6210\u529f\u83b7\u53d6\u5230\u9501.<\/p>\n

          \u5b89\u5168\u4e89\u8bae<\/strong><\/p>\n

          \u8fd9\u4e2a\u7b97\u6cd5\u5b89\u5168\u4e48\uff1f\u6211\u4eec\u53ef\u4ee5\u4ece\u4e0d\u540c\u7684\u573a\u666f\u8ba8\u8bba\u4e00\u4e0b\u3002<\/p>\n

          \u8ba9\u6211\u4eec\u5047\u8bbe\u5ba2\u6237\u7aef\u4ece\u5927\u591a\u6570Redis\u5b9e\u4f8b\u53d6\u5230\u4e86\u9501\u3002\u6240\u6709\u7684\u5b9e\u4f8b\u90fd\u5305\u542b\u540c\u6837\u7684key\uff0c\u5e76\u4e14key\u7684\u6709\u6548\u65f6\u95f4\u4e5f\u4e00\u6837\u3002\u7136\u800c\uff0ckey\u80af\u5b9a\u662f\u5728\u4e0d\u540c\u7684\u65f6\u95f4\u88ab\u8bbe\u7f6e\u4e0a\u7684\uff0c\u6240\u4ee5key\u7684\u5931\u6548\u65f6\u95f4\u4e5f\u4e0d\u662f\u7cbe\u786e\u7684\u76f8\u540c\u3002\u6211\u4eec\u5047\u8bbe\u7b2c\u4e00\u4e2a\u8bbe\u7f6e\u7684key\u65f6\u95f4\u662fT1(\u5f00\u59cb\u5411\u7b2c\u4e00\u4e2aserver\u53d1\u9001\u547d\u4ee4\u524d\u65f6\u95f4\uff09\uff0c\u6700\u540e\u4e00\u4e2a\u8bbe\u7f6e\u7684key\u65f6\u95f4\u662fT2(\u5f97\u5230\u6700\u540e\u4e00\u53f0server\u7684\u7b54\u590d\u540e\u7684\u65f6\u95f4\uff09\uff0c\u6211\u4eec\u53ef\u4ee5\u786e\u8ba4\uff0c\u7b2c\u4e00\u4e2aserver\u7684key\u81f3\u5c11\u4f1a\u5b58\u6d3b MIN_VALIDITY=TTL-(T2-T1)-CLOCK_DRIFT\u3002\u6240\u6709\u5176\u4ed6\u7684key\u7684\u5b58\u6d3b\u65f6\u95f4\uff0c\u90fd\u4f1a\u6bd4\u8fd9\u4e2akey\u65f6\u95f4\u665a\uff0c\u6240\u4ee5\u53ef\u4ee5\u80af\u5b9a\uff0c\u6240\u6709key\u7684\u5931\u6548\u65f6\u95f4\u81f3\u5c11\u662fMIN_VALIDITY\u3002<\/p>\n

          \u5f53\u5927\u90e8\u5206\u5b9e\u4f8b\u7684key\u88ab\u8bbe\u7f6e\u540e\uff0c\u5176\u4ed6\u7684\u5ba2\u6237\u7aef\u5c06\u4e0d\u80fd\u518d\u53d6\u5230\u9501\uff0c\u56e0\u4e3a\u81f3\u5c11N\/2+1\u4e2a\u5b9e\u4f8b\u5df2\u7ecf\u5b58\u5728key\u3002\u6240\u4ee5\uff0c\u5982\u679c\u4e00\u4e2a\u9501\u88ab\uff08\u5ba2\u6237\u7aef\uff09\u83b7\u53d6\u540e\uff0c\u5ba2\u6237\u7aef\u81ea\u5df1\u4e5f\u4e0d\u80fd\u518d\u6b21\u7533\u8bf7\u5230\u9501(\u8fdd\u53cd\u4e92\u76f8\u6392\u65a5\u5c5e\u6027\uff09\u3002<\/p>\n

          \u7136\u800c\u6211\u4eec\u4e5f\u60f3\u786e\u4fdd\uff0c\u5f53\u591a\u4e2a\u5ba2\u6237\u7aef\u540c\u65f6\u62a2\u593a\u4e00\u4e2a\u9501\u65f6\u4e0d\u80fd\u4e24\u4e2a\u90fd\u6210\u529f\u3002<\/p>\n

          \u5982\u679c\u5ba2\u6237\u7aef\u5728\u83b7\u53d6\u5230\u5927\u591a\u6570redis\u5b9e\u4f8b\u9501\uff0c\u4f7f\u7528\u7684\u65f6\u95f4\u63a5\u8fd1\u6216\u8005\u5df2\u7ecf\u5927\u4e8e\u5931\u6548\u65f6\u95f4\uff0c\u5ba2\u6237\u7aef\u5c06\u8ba4\u4e3a\u9501\u662f\u5931\u6548\u7684\u9501\uff0c\u5e76\u4e14\u5c06\u91ca\u653e\u6389\u5df2\u7ecf\u83b7\u53d6\u5230\u7684\u9501\uff0c\u6240\u4ee5\u6211\u4eec\u53ea\u9700\u8981\u5728\u6709\u6548\u65f6\u95f4\u8303\u56f4\u5185\u83b7\u53d6\u5230\u5927\u90e8\u5206\u9501\u8fd9\u79cd\u60c5\u51b5\u3002\u5728\u4e0a\u9762\u5df2\u7ecf\u8ba8\u8bba\u8fc7\u6709\u4e89\u8bae\u7684\u5730\u65b9\uff0c\u5728MIN_VALIDITY\u65f6\u95f4\u5185\uff0c\u5c06\u6ca1\u6709\u5ba2\u6237\u7aef\u518d\u6b21\u53d6\u5f97\u9501\u3002\u6240\u4ee5\u53ea\u6709\u4e00\u79cd\u60c5\u51b5\uff0c\u591a\u4e2a\u5ba2\u6237\u7aef\u4f1a\u5728\u76f8\u540c\u65f6\u95f4\u53d6\u5f97N\/2+1\u5b9e\u4f8b\u7684\u9501\uff0c\u90a3\u5c31\u662f\u53d6\u5f97\u9501\u7684\u65f6\u95f4\u5927\u4e8e\u5931\u6548\u65f6\u95f4\uff08TTL time)\uff0c\u8fd9\u6837\u53d6\u5230\u7684\u9501\u4e5f\u662f\u65e0\u6548\u7684.<\/p>\n

          \u5982\u679c\u4f60\u80fd\u63d0\u4f9b\u5173\u4e8e\u73b0\u6709\u7684\u7c7b\u4f3c\u7b97\u6cd5\u7684\u4e00\u4e2a\u6b63\u5f0f\u8bc1\u660e\uff08\u6307\u51fa\u6b63\u786e\u6027\uff09\uff0c\u6216\u8005\u662f\u53d1\u73b0\u8fd9\u4e2a\u7b97\u6cd5\u7684bug\uff1f \u6211\u4eec\u5c06\u975e\u5e38\u611f\u6fc0.<\/p>\n

          \u6d3b\u6027\u4e89\u8bae<\/strong><\/p>\n

          \u7cfb\u7edf\u7684\u6d3b\u6027\u5b89\u5168\u57fa\u4e8e\u4e09\u4e2a\u4e3b\u8981\u7279\u6027:<\/p>\n

            \n
          1. \u9501\u7684\u81ea\u52a8\u91ca\u653e\uff08\u56e0\u4e3akey\u5931\u6548\u4e86\uff09\uff1a\u6700\u7ec8\u9501\u53ef\u4ee5\u518d\u6b21\u88ab\u4f7f\u7528\u3002<\/li>\n
          2. \u5ba2\u6237\u7aef\u901a\u5e38\u4f1a\u5c06\u6ca1\u6709\u83b7\u53d6\u5230\u7684\u9501\u5220\u9664\uff0c\u6216\u8005\u9501\u88ab\u53d6\u5230\u540e\uff0c\u4f7f\u7528\u5b8c\u540e\uff0c\u5ba2\u6237\u7aef\u4f1a\u4e3b\u52a8\uff08\u63d0\u524d\uff09\u91ca\u653e\u9501\uff0c\u800c\u4e0d\u662f\u7b49\u5230\u9501\u5931\u6548\u53e6\u5916\u7684\u5ba2\u6237\u7aef\u624d\u80fd\u53d6\u5230\u9501\u3002<\/li>\n
          3. \u5f53\u5ba2\u6237\u7aef\u91cd\u8bd5\u83b7\u53d6\u9501\u65f6\uff0c\u9700\u8981\u7b49\u5f85\u4e00\u6bb5\u65f6\u95f4\uff0c\u8fd9\u4e2a\u65f6\u95f4\u5fc5\u987b\u5927\u4e8e\u4ece\u5927\u591a\u6570Redis\u5b9e\u4f8b\u6210\u529f\u83b7\u53d6\u9501\u4f7f\u7528\u7684\u65f6\u95f4\uff0c\u4ee5\u6700\u5927\u9650\u5ea6\u5730\u907f\u514d\u8111\u88c2\u3002<\/li>\n<\/ol>\n

            \u7136\u800c\uff0c\u5f53\u7f51\u7edc\u51fa\u73b0\u95ee\u9898\u65f6\u7cfb\u7edf\u5728\u5931\u6548\u65f6\u95f4(TTL)\u5185\u5c31\u65e0\u6cd5\u670d\u52a1\uff0c\u8fd9\u79cd\u60c5\u51b5\u4e0b\u6211\u4eec\u7684\u7a0b\u5e8f\u5c31\u4f1a\u4e3a\u6b64\u4ed8\u51fa\u4ee3\u4ef7\u3002\u5982\u679c\u7f51\u7edc\u6301\u7eed\u7684\u6709\u95ee\u9898\uff0c\u53ef\u80fd\u5c31\u4f1a\u51fa\u73b0\u6b7b\u5faa\u73af\u4e86\u3002 \u8fd9\u79cd\u60c5\u51b5\u53d1\u751f\u5728\u5f53\u5ba2\u6237\u7aef\u521a\u53d6\u5230\u4e00\u4e2a\u9501\u8fd8\u6ca1\u6709\u6765\u5f97\u53ca\u91ca\u653e\u9501\u5c31\u88ab\u7f51\u7edc\u9694\u79bb.<\/p>\n

            \u5982\u679c\u7f51\u7edc\u4e00\u76f4\u6ca1\u6709\u6062\u590d\uff0c\u8fd9\u4e2a\u7b97\u6cd5\u4f1a\u5bfc\u81f4\u7cfb\u7edf\u4e0d\u53ef\u7528.<\/p>\n

            \u6027\u80fd\uff0c\u5d29\u6e83\u6062\u590d\u548cRedis\u540c\u6b65<\/strong><\/p>\n

            \u5f88\u591a\u7528\u6237\u628aRedis\u5f53\u505a\u5206\u5e03\u5f0f\u9501\u670d\u52a1\u5668\uff0c\u4f7f\u7528\u83b7\u53d6\u9501\u548c\u91ca\u653e\u9501\u7684\u54cd\u5e94\u65f6\u95f4\uff0c\u6bcf\u79d2\u949f\u53ef\u7528\u6267\u884c\u591a\u5c11\u6b21 acquire \/ release \u64cd\u4f5c\u4f5c\u4e3a\u6027\u80fd\u6307\u6807\u3002\u4e3a\u4e86\u8fbe\u5230\u8fd9\u4e00\u8981\u6c42\uff0c\u589e\u52a0Redis\u5b9e\u4f8b\u5f53\u7136\u53ef\u7528\u964d\u4f4e\u54cd\u5e94\u5ef6\u8fdf\uff08\u6ca1\u6709\u94b1\u4e70\u786c\u4ef6\u7684\u201d\u7a77\u4eba\u201d,\u4e5f\u53ef\u4ee5\u5728\u7f51\u7edc\u65b9\u9762\u505a\u4f18\u5316\uff0c\u4f7f\u7528\u975e\u963b\u585e\u6a21\u578b\uff0c\u4e00\u6b21\u53d1\u9001\u6240\u6709\u7684\u547d\u4ee4\uff0c\u7136\u540e\u5f02\u6b65\u7684\u8bfb\u53d6\u54cd\u5e94\u7ed3\u679c\uff0c\u5047\u8bbe\u5ba2\u6237\u7aef\u548credis\u670d\u52a1\u5668\u4e4b\u95f4\u7684RTT\u90fd\u5dee\u4e0d\u591a\u3002<\/p>\n

            \u7136\u800c\uff0c\u5982\u679c\u6211\u4eec\u60f3\u4f7f\u7528\u53ef\u4ee5\u4ece\u5907\u4efd\u4e2d\u6062\u590d\u7684redis\u6a21\u5f0f\uff0c\u6709\u53e6\u5916\u4e00\u79cd\u6301\u4e45\u5316\u60c5\u51b5\u4f60\u9700\u8981\u8003\u8651\uff0c.<\/p>\n

            \u6211\u4eec\u8003\u8651\u8fd9\u6837\u4e00\u79cd\u573a\u666f\uff0c\u5047\u8bbe\u6211\u4eec\u7684redis\u6ca1\u7528\u4f7f\u7528\u5907\u4efd\u3002\u4e00\u4e2a\u5ba2\u6237\u7aef\u83b7\u53d6\u5230\u4e863\u4e2a\u5b9e\u4f8b\u7684\u9501\u3002\u6b64\u65f6\uff0c\u5176\u4e2d\u4e00\u4e2a\u5df2\u7ecf\u88ab\u5ba2\u6237\u7aef\u53d6\u5230\u9501\u7684redis\u5b9e\u4f8b\u88ab\u91cd\u542f\uff0c\u5728\u8fd9\u4e2a\u65f6\u95f4\u70b9\uff0c\u5c31\u53ef\u80fd\u51fa\u73b03\u4e2a\u8282\u70b9\u6ca1\u6709\u8bbe\u7f6e\u9501\uff0c\u6b64\u65f6\u5982\u679c\u6709\u53e6\u5916\u4e00\u4e2a\u5ba2\u6237\u7aef\u6765\u8bbe\u7f6e\u9501\uff0c\u9501\u5c31\u53ef\u80fd\u88ab\u518d\u6b21\u83b7\u53d6\u5230\uff0c\u8fd9\u6837\u9501\u7684\u4e92\u76f8\u6392\u65a5\u7684\u7279\u6027\u5c31\u88ab\u7834\u574f\u6389\u4e86\u3002<\/p>\n

            \u5982\u679c\u6211\u4eec\u542f\u7528\u4e86AOF\u6301\u4e45\u5316\uff0c\u60c5\u51b5\u4f1a\u597d\u5f88\u591a\u3002\u6211\u4eec\u53ef\u7528\u4f7f\u7528SHUTDOWN\u547d\u4ee4\u5173\u95ed\u7136\u540e\u518d\u6b21\u91cd\u542f\u3002\u56e0\u4e3aRedis\u5230\u671f\u662f\u8bed\u4e49\u4e0a\u5b9e\u73b0\u7684\uff0c\u6240\u4ee5\u5f53\u670d\u52a1\u5668\u5173\u95ed\u65f6\uff0c\u5b9e\u9645\u4e0a\u8fd8\u662f\u7ecf\u8fc7\u4e86\u65f6\u95f4\uff0c\u6240\u6709\uff08\u4fdd\u6301\u9501\uff09\u9700\u8981\u7684\u6761\u4ef6\u90fd\u6ca1\u6709\u53d7\u5230\u5f71\u54cd. \u6ca1\u6709\u53d7\u5230\u5f71\u54cd\u7684\u524d\u63d0\u662fredis\u4f18\u96c5\u7684\u5173\u95ed\u3002\u505c\u7535\u4e86\u600e\u4e48\u529e\uff1f\u5982\u679credis\u662f\u6bcf\u79d2\u6267\u884c\u4e00\u6b21fsync\uff0c\u90a3\u4e48\u5f88\u6709\u53ef\u80fd\u5728redis\u91cd\u542f\u4e4b\u540e\uff0ckey\u5df2\u7ecf\u4e22\u5f03\u3002\u7406\u8bba\u4e0a\uff0c\u5982\u679c\u6211\u4eec\u60f3\u5728Redis\u91cd\u542f\u5730\u4efb\u4f55\u60c5\u51b5\u4e0b\u90fd\u4fdd\u8bc1\u9501\u7684\u5b89\u5168\uff0c\u6211\u4eec\u5fc5\u987b\u5f00\u542ffsync=always\u7684\u914d\u7f6e\u3002\u8fd9\u53cd\u8fc7\u6765\u5c06\u5b8c\u5168\u7834\u574f\u4e0e\u4f20\u7edf\u4e0a\u7528\u4e8e\u4ee5\u5b89\u5168\u7684\u65b9\u5f0f\u5b9e\u73b0\u5206\u5e03\u5f0f\u9501\u7684\u540c\u4e00\u7ea7\u522b\u7684CP\u7cfb\u7edf\u7684\u6027\u80fd.<\/p>\n

            \u7136\u800c\u60c5\u51b5\u603b\u6bd4\u4e00\u5f00\u59cb\u60f3\u8c61\u7684\u597d\u4e00\u4e9b\u3002\u5f53\u4e00\u4e2aredis\u8282\u70b9\u91cd\u542f\u540e\uff0c\u53ea\u8981\u5b83\u4e0d\u53c2\u4e0e\u5230\u4efb\u610f\u5f53\u524d\u6d3b\u52a8<\/strong>\u7684\u9501\uff0c\u6ca1\u6709\u88ab\u5f53\u505a\u201c\u5f53\u524d\u5b58\u6d3b\u201d\u8282\u70b9\u88ab\u5ba2\u6237\u7aef\u91cd\u65b0\u83b7\u53d6\u5230,\u7b97\u6cd5\u7684\u5b89\u5168\u6027\u4ecd\u7136\u662f\u6709\u4fdd\u969c\u7684\u3002<\/p>\n

            \u4e3a\u4e86\u8fbe\u5230\u8fd9\u79cd\u6548\u679c\uff0c\u6211\u4eec\u53ea\u9700\u8981\u5c06\u65b0\u7684redis\u5b9e\u4f8b\uff0c\u5728\u4e00\u4e2aTTL\u65f6\u95f4\u5185\uff0c\u5bf9\u5ba2\u6237\u7aef\u4e0d\u53ef\u7528\u5373\u53ef\uff0c\u5728\u8fd9\u4e2a\u65f6\u95f4\u5185\uff0c\u6240\u6709\u5ba2\u6237\u7aef\u9501\u5c06\u88ab\u5931\u6548\u6216\u8005\u81ea\u52a8\u91ca\u653e.<\/p>\n

            \u4f7f\u7528\u5ef6\u8fdf\u91cd\u542f\u53ef\u4ee5\u5728\u4e0d\u91c7\u7528\u6301\u4e45\u5316\u7b56\u7565\u7684\u60c5\u51b5\u4e0b\u8fbe\u5230\u540c\u6837\u7684\u5b89\u5168\uff0c\u7136\u800c\u8fd9\u6837\u505a\u6709\u65f6\u4f1a\u8ba9\u7cfb\u7edf\u8f6c\u5316\u4e3a\u5f7b\u5e95\u4e0d\u53ef\u7528\u3002\u6bd4\u5982\u5927\u90e8\u5206\u7684redis\u5b9e\u4f8b\u90fd\u5d29\u6e83\u4e86\uff0c\u7cfb\u7edf\u5728TTL\u65f6\u95f4\u5185\u4efb\u4f55\u9501\u90fd\u5c06\u65e0\u6cd5\u52a0\u9501\u6210\u529f\u3002<\/p>\n

            \u4f7f\u7b97\u6cd5\u66f4\u52a0\u53ef\u9760\uff1a\u9501\u7684\u6269\u5c55<\/strong><\/p>\n

            \u5982\u679c\u4f60\u7684\u5de5\u4f5c\u53ef\u4ee5\u62c6\u5206\u4e3a\u8bb8\u591a\u5c0f\u6b65\u9aa4\uff0c\u53ef\u4ee5\u5c06\u6709\u6548\u65f6\u95f4\u8bbe\u7f6e\u7684\u5c0f\u4e00\u4e9b\uff0c\u4f7f\u7528\u9501\u7684\u4e00\u4e9b\u6269\u5c55\u673a\u5236\u3002\u5728\u5de5\u4f5c\u8fdb\u884c\u7684\u8fc7\u7a0b\u4e2d\uff0c\u5f53\u53d1\u73b0\u9501\u5269\u4e0b\u7684\u6709\u6548\u65f6\u95f4\u5f88\u77ed\u65f6\uff0c\u53ef\u4ee5\u518d\u6b21\u5411redis\u7684\u6240\u6709\u5b9e\u4f8b\u53d1\u9001\u4e00\u4e2aLua\u811a\u672c\uff0c\u8ba9key\u7684\u6709\u6548\u65f6\u95f4\u5ef6\u957f\u4e00\u70b9\uff08\u524d\u63d0\u8fd8\u662fkey\u5b58\u5728\u5e76\u4e14value\u662f\u4e4b\u524d\u8bbe\u7f6e\u7684value)\u3002<\/p>\n

            \u5ba2\u6237\u7aef\u6269\u5c55TTL\u65f6\u5fc5\u987b\u50cf\u9996\u6b21\u53d6\u5f97\u9501\u4e00\u6837\u5728\u5927\u591a\u6570\u5b9e\u4f8b\u4e0a\u6269\u5c55\u6210\u529f\u624d\u7b97\u518d\u6b21\u53d6\u5230\u9501\uff0c\u5e76\u4e14\u662f\u5728\u6709\u6548\u65f6\u95f4\u5185\u518d\u6b21\u53d6\u5230\u9501\uff08\u7b97\u6cd5\u548c\u83b7\u53d6\u9501\u662f\u975e\u5e38\u76f8\u4f3c\u7684\uff09\u3002<\/p>\n

            \u8fd9\u6837\u505a\u4ece\u6280\u672f\u4e0a\u5c06\u5e76\u4e0d\u4f1a\u6539\u53d8\u7b97\u6cd5\u7684\u6b63\u786e\u6027\uff0c\u6240\u4ee5\u6269\u5c55\u9501\u7684\u8fc7\u7a0b\u4e2d\u4ecd\u7136\u9700\u8981\u8fbe\u5230\u83b7\u53d6\u5230N\/2+1\u4e2a\u5b9e\u4f8b\u8fd9\u4e2a\u8981\u6c42\uff0c\u5426\u5219\u6d3b\u6027\u7279\u6027\u4e4b\u4e00\u5c31\u4f1a\u5931\u6548\u3002<\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

            \u539f\u6587\u5730\u5740   Java\u6280\u672f\u67b6\u6784<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"colormag_page_container_layout":"default_layout","colormag_page_sidebar_layout":"default_layout","footnotes":""},"categories":[],"tags":[118],"class_list":["post-4273","post","type-post","status-publish","format-standard","hentry","tag-02-"],"_links":{"self":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/posts\/4273","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/comments?post=4273"}],"version-history":[{"count":0,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/posts\/4273\/revisions"}],"wp:attachment":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/media?parent=4273"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/categories?post=4273"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/tags?post=4273"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}