{"id":201205,"date":"2025-05-10T09:30:39","date_gmt":"2025-05-10T01:30:39","guid":{"rendered":"https:\/\/server.hk\/cnblog\/201205\/"},"modified":"2025-05-10T09:30:39","modified_gmt":"2025-05-10T01:30:39","slug":"redis%e9%9b%86%e7%be%a4%e8%8a%82%e7%82%b9%e9%80%9a%e4%bf%a1%e8%bf%87%e7%a8%8b-%e5%8e%9f%e7%90%86%e6%b5%81%e7%a8%8b%e5%88%86%e6%9e%90","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/201205\/","title":{"rendered":"Redis\u96c6\u7fa4\u8282\u70b9\u901a\u4fe1\u8fc7\u7a0b\/\u539f\u7406\u6d41\u7a0b\u5206\u6790"},"content":{"rendered":"

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

Redis\u96c6\u7fa4\u8282\u70b9\u901a\u4fe1\u8fc7\u7a0b\/\u539f\u7406\u6d41\u7a0b\u5206\u6790<\/h1>\n

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

\u5728\u6570\u636e\u5e93\u5b9e\u6218\u5f00\u53d1\u7684\u8fc7\u7a0b\u4e2d\uff0c\u6211\u4eec\u7ecf\u5e38\u4f1a\u9047\u5230\u4e00\u4e9b\u8fd9\u6837\u90a3\u6837\u7684\u95ee\u9898\uff0c\u7136\u540e\u8981\u5361\u597d\u534a\u5929\uff0c\u7b49\u95ee\u9898\u89e3\u51b3\u4e86\u624d\u53d1\u73b0\u539f\u6765\u4e00\u4e9b\u7ec6\u8282\u77e5\u8bc6\u70b9\u8fd8\u662f\u6ca1\u6709\u638c\u63e1\u597d\u3002\u4eca\u5929golang\u5b66\u4e60\u7f51\u5c31\u6574\u7406\u5206\u4eab\u300aRedis\u96c6\u7fa4\u8282\u70b9\u901a\u4fe1\u8fc7\u7a0b\/\u539f\u7406\u6d41\u7a0b\u5206\u6790\u300b\uff0c\u804a\u804aredis\u96c6\u7fa4\u3001\u8282\u70b9\u901a\u4fe1\uff0c\u5e0c\u671b\u53ef\u4ee5\u5e2e\u52a9\u5230\u6b63\u5728\u52aa\u529b\u8d5a\u94b1\u7684\u4f60\u3002<\/p>\n

\u7b80\u4ecb<\/h2>\n

        \u672c\u6587\u4ecb\u7ecdRedis\u7684Cluster\uff08\u96c6\u7fa4\uff09\u7684\u8282\u70b9\u901a\u4fe1\u7684\u6d41\u7a0b\u3002<\/p>\n

\u901a\u4fe1\u6d41\u7a0b<\/h2>\n

        \u5728\u5206\u5e03\u5f0f\u5b58\u50a8\u4e2d\u9700\u8981\u63d0\u4f9b\u7ef4\u62a4\u8282\u70b9\u5143\u6570\u636e\u4fe1\u606f\u7684\u673a\u5236\uff0c \u6240\u8c13\u5143\u6570\u636e\u662f\u6307\uff1a \u8282\u70b9\u8d1f\u8d23\u54ea\u4e9b\u6570\u636e\uff0c \u662f\u5426\u51fa\u73b0\u6545\u969c\u7b49\u72b6\u6001\u4fe1\u606f\u3002 \u5e38\u89c1\u7684\u5143\u6570\u636e\u7ef4\u62a4\u65b9\u5f0f\u5206\u4e3a\uff1a \u96c6\u4e2d\u5f0f\u548cP2P\u65b9\u5f0f\u3002 Redis\u96c6\u7fa4\u91c7\u7528P2P\u7684Gossip\uff08\u6d41\u8a00\uff09 \u534f\u8bae\uff0cGossip\u534f\u8bae\u5de5\u4f5c\u539f\u7406\u5c31\u662f\u8282\u70b9\u5f7c\u6b64\u4e0d\u65ad\u901a\u4fe1\u4ea4\u6362\u4fe1\u606f\uff0c \u4e00\u6bb5\u65f6\u95f4\u540e\u6240\u6709\u7684\u8282\u70b9\u90fd\u4f1a\u77e5\u9053\u96c6\u7fa4\u5b8c\u6574\u7684\u4fe1\u606f\uff0c \u8fd9\u79cd\u65b9\u5f0f\u7c7b\u4f3c\u6d41\u8a00\u4f20\u64ad\uff0c \u5982\u4e0b\u6240\u793a<\/p>\n

<\/p>\n

\u901a\u4fe1\u8fc7\u7a0b\u8bf4\u660e\uff1a<\/p>\n

    \n
  • \u96c6\u7fa4\u4e2d\u7684\u6bcf\u4e2a\u8282\u70b9\u90fd\u4f1a\u5355\u72ec\u5f00\u8f9f\u4e00\u4e2aTCP\u901a\u9053\uff0c \u7528\u4e8e\u8282\u70b9\u4e4b\u95f4\u5f7c\u6b64\u901a\u4fe1\uff0c \u901a\u4fe1\u7aef\u53e3\u53f7\u5728\u57fa\u7840\u7aef\u53e3\u4e0a\u52a010000\u3002<\/li>\n
  • \u6bcf\u4e2a\u8282\u70b9\u5728\u56fa\u5b9a\u5468\u671f\u5185\u901a\u8fc7\u7279\u5b9a\u89c4\u5219\u9009\u62e9\u51e0\u4e2a\u8282\u70b9\u53d1\u9001ping\u6d88\u606f\u3002\u63a5\u6536\u5230ping\u6d88\u606f\u7684\u8282\u70b9\u7528pong\u6d88\u606f\u4f5c\u4e3a\u54cd\u5e94\u3002<\/li>\n
  • \u96c6\u7fa4\u4e2d\u6bcf\u4e2a\u8282\u70b9\u901a\u8fc7\u4e00\u5b9a\u89c4\u5219\u6311\u9009\u8981\u901a\u4fe1\u7684\u8282\u70b9\uff0c \u6bcf\u4e2a\u8282\u70b9\u53ef\u80fd\u77e5\u9053\u5168\u90e8\u8282\u70b9\uff0c \u4e5f\u53ef\u80fd\u4ec5\u77e5\u9053\u90e8\u5206\u8282\u70b9\uff0c \u53ea\u8981\u8fd9\u4e9b\u8282\u70b9\u5f7c\u6b64\u53ef\u4ee5\u6b63\u5e38\u901a\u4fe1\uff0c \u6700\u7ec8\u5b83\u4eec\u4f1a\u8fbe\u5230\u4e00\u81f4\u7684\u72b6\u6001\u3002 \u5f53\u8282\u70b9\u51fa\u6545\u969c\u3001 \u65b0\u8282\u70b9\u52a0\u5165\u3001 \u4e3b\u4ece\u89d2\u8272\u53d8\u5316\u3001 \u69fd\u4fe1\u606f\u53d8\u66f4\u7b49\u4e8b\u4ef6\u53d1\u751f\u65f6\uff0c \u901a\u8fc7\u4e0d\u65ad\u7684ping\/pong\u6d88\u606f\u901a\u4fe1\uff0c \u7ecf\u8fc7\u4e00\u6bb5\u65f6\u95f4\u540e\u6240\u6709\u7684\u8282\u70b9\u90fd\u4f1a\u77e5\u9053\u6574\u4e2a\u96c6\u7fa4\u5168\u90e8\u8282\u70b9\u7684\u6700\u65b0\u72b6\u6001\uff0c \u4ece\u800c\u8fbe\u5230\u96c6\u7fa4\u72b6\u6001\u540c\u6b65\u7684\u76ee\u7684\u3002 <\/li>\n<\/ul>\n

    Gossip\u6d88\u606f<\/h2>\n

    \u6d88\u606f\u6d41\u7a0b<\/h3>\n

            Gossip\u534f\u8bae\u7684\u4e3b\u8981\u804c\u8d23\u5c31\u662f\u4fe1\u606f\u4ea4\u6362\u3002 \u4fe1\u606f\u4ea4\u6362\u7684\u8f7d\u4f53\u5c31\u662f\u8282\u70b9\u5f7c\u6b64\u53d1\u9001\u7684Gossip\u6d88\u606f\uff0c \u4e86\u89e3\u8fd9\u4e9b\u6d88\u606f\u6709\u52a9\u4e8e\u6211\u4eec\u7406\u89e3\u96c6\u7fa4\u5982\u4f55\u5b8c\u6210\u4fe1\u606f\u4ea4\u6362\u3002<\/p>\n

            \u5e38\u7528\u7684Gossip\u6d88\u606f\u53ef\u5206\u4e3a\uff1a ping\u6d88\u606f\u3001 pong\u6d88\u606f\u3001 meet\u6d88\u606f\u3001 fail\u6d88\u606f\u7b49\uff0c \u5b83\u4eec\u7684\u901a\u4fe1\u6a21\u5f0f\u5982\u4e0b\u56fe\u6240\u793a\uff1a<\/p>\n

    <\/p>\n

      \n
    • meet\u6d88\u606f\uff1a \u7528\u4e8e\u901a\u77e5\u65b0\u8282\u70b9\u52a0\u5165\u3002<\/li>\n<\/ul>\n

      \u6d88\u606f\u53d1\u9001\u8005\u901a\u77e5\u63a5\u6536\u8005\u52a0\u5165\u5230\u5f53\u524d\u96c6\u7fa4\uff0c meet\u6d88\u606f\u901a\u4fe1\u6b63\u5e38\u5b8c\u6210\u540e\uff0c \u63a5\u6536\u8282\u70b9\u4f1a\u52a0\u5165\u5230\u96c6\u7fa4\u4e2d\u5e76\u8fdb\u884c\u5468\u671f\u6027\u7684ping\u3001 pong\u6d88\u606f\u4ea4\u6362\u3002<\/p>\n

        \n
      • ping\u6d88\u606f\uff1a \u96c6\u7fa4\u5185\u4ea4\u6362\u6700\u9891\u7e41\u7684\u6d88\u606f<\/li>\n<\/ul>\n

         \u96c6\u7fa4\u5185\u6bcf\u4e2a\u8282\u70b9\u6bcf\u79d2\u5411\u591a\u4e2a\u5176\u4ed6\u8282\u70b9\u53d1\u9001ping\u6d88\u606f\uff0c \u7528\u4e8e\u68c0\u6d4b\u8282\u70b9\u662f\u5426\u5728\u7ebf\u548c\u4ea4\u6362\u5f7c\u6b64\u72b6\u6001\u4fe1\u606f\u3002 ping\u6d88\u606f\u53d1\u9001\u5c01\u88c5\u4e86\u81ea\u8eab\u8282\u70b9\u548c\u90e8\u5206\u5176\u4ed6\u8282\u70b9\u7684\u72b6\u6001\u6570\u636e\u3002<\/p>\n

          \n
        • pong\u6d88\u606f\uff1a \u5f53\u63a5\u6536\u5230ping\u3001 meet\u6d88\u606f\u65f6\uff0c \u4f5c\u4e3a\u54cd\u5e94\u6d88\u606f\u56de\u590d\u7ed9\u53d1\u9001\u65b9\u786e\u8ba4\u6d88\u606f\u6b63\u5e38\u901a\u4fe1\u3002<\/li>\n<\/ul>\n

          pong\u6d88\u606f\u5185\u90e8\u5c01\u88c5\u4e86\u81ea\u8eab\u72b6\u6001\u6570\u636e\u3002 \u8282\u70b9\u4e5f\u53ef\u4ee5\u5411\u96c6\u7fa4\u5185\u5e7f\u64ad\u81ea\u8eab\u7684pong\u6d88\u606f\u6765\u901a\u77e5\u6574\u4e2a\u96c6\u7fa4\u5bf9\u81ea\u8eab\u72b6\u6001\u8fdb\u884c\u66f4\u65b0\u3002
          fail\u6d88\u606f\uff1a \u5f53\u8282\u70b9\u5224\u5b9a\u96c6\u7fa4\u5185\u53e6\u4e00\u4e2a\u8282\u70b9\u4e0b\u7ebf\u65f6\uff0c \u4f1a\u5411\u96c6\u7fa4\u5185\u5e7f\u64ad\u4e00\u4e2afail\u6d88\u606f\uff0c \u5176\u4ed6\u8282\u70b9\u63a5\u6536\u5230fail\u6d88\u606f\u4e4b\u540e\u628a\u5bf9\u5e94\u8282\u70b9\u66f4\u65b0\u4e3a\u4e0b\u7ebf\u72b6\u6001\u3002 \u5177\u4f53\u7ec6\u8282\u5c06\u5728\u540e\u9762\u201c\u6545\u969c\u8f6c\u79fb\u201d\u4e2d\u8bf4\u660e\u3002<\/p>\n

          \u6d88\u606f\u683c\u5f0f<\/h3>\n

                  \u6240\u6709\u7684\u6d88\u606f\u683c\u5f0f\u5212\u5206\u4e3a\uff1a \u6d88\u606f\u5934\u548c\u6d88\u606f\u4f53\u3002 \u6d88\u606f\u5934\u5305\u542b\u53d1\u9001\u8282\u70b9\u81ea\u8eab\u72b6\u6001\u6570\u636e\uff0c \u63a5\u6536\u8282\u70b9\u6839\u636e\u6d88\u606f\u5934\u5c31\u53ef\u4ee5\u83b7\u53d6\u5230\u53d1\u9001\u8282\u70b9\u7684\u76f8\u5173\u6570\u636e\uff0c \u7ed3\u6784\u5982\u4e0b\uff1a<\/p>\n

          typedef struct {\n    char sig[4]; \/* \u4fe1\u53f7\u6807\u793a *\/\n    uint32_t totlen; \/* \u6d88\u606f\u603b\u957f\u5ea6 *\/\n    uint16_t ver; \/* \u534f\u8bae\u7248\u672c*\/\n    uint16_t type; \/* \u6d88\u606f\u7c7b\u578b,\u7528\u4e8e\u533a\u5206meet,ping,pong\u7b49\u6d88\u606f *\/\n    uint16_t count; \/* \u6d88\u606f\u4f53\u5305\u542b\u7684\u8282\u70b9\u6570\u91cf\uff0c \u4ec5\u7528\u4e8emeet,ping,ping\u6d88\u606f\u7c7b\u578b*\/\n    uint64_t currentEpoch; \/* \u5f53\u524d\u53d1\u9001\u8282\u70b9\u7684\u914d\u7f6e\u7eaa\u5143 *\/\n    uint64_t configEpoch; \/* \u4e3b\u8282\u70b9\/\u4ece\u8282\u70b9\u7684\u4e3b\u8282\u70b9\u914d\u7f6e\u7eaa\u5143 *\/\n    uint64_t offset; \/* \u590d\u5236\u504f\u79fb\u91cf *\/\n    char sender[CLUSTER_NAMELEN]; \/* \u53d1\u9001\u8282\u70b9\u7684nodeId *\/\n    unsigned char myslots[CLUSTER_SLOTS\/8]; \/* \u53d1\u9001\u8282\u70b9\u8d1f\u8d23\u7684\u69fd\u4fe1\u606f *\/\n    char slaveof[CLUSTER_NAMELEN]; \/* \u5982\u679c\u53d1\u9001\u8282\u70b9\u662f\u4ece\u8282\u70b9\uff0c \u8bb0\u5f55\u5bf9\u5e94\u4e3b\u8282\u70b9\u7684nodeId *\/\n    uint16_t port; \/* \u7aef\u53e3\u53f7 *\/\n    uint16_t flags; \/* \u53d1\u9001\u8282\u70b9\u6807\u8bc6,\u533a\u5206\u4e3b\u4ece\u89d2\u8272\uff0c \u662f\u5426\u4e0b\u7ebf\u7b49 *\/\n    unsigned char state; \/* \u53d1\u9001\u8282\u70b9\u6240\u5904\u7684\u96c6\u7fa4\u72b6\u6001 *\/\n    unsigned char mflags[3]; \/* \u6d88\u606f\u6807\u8bc6 *\/\n    union clusterMsgData data \/* \u6d88\u606f\u6b63\u6587 *\/;\n} clusterMsg;<\/pre>\n
                  \u96c6\u7fa4\u5185\u6240\u6709\u7684\u6d88\u606f\u90fd\u91c7\u7528\u76f8\u540c\u7684\u6d88\u606f\u5934\u7ed3\u6784clusterMsg\uff0c \u5b83\u5305\u542b\u4e86\u53d1\u9001\u8282\u70b9\u5173\u952e\u4fe1\u606f\uff0c \u5982\u8282\u70b9id\u3001 \u69fd\u6620\u5c04\u3001 \u8282\u70b9\u6807\u8bc6\uff08\u4e3b\u4ece\u89d2\u8272\uff0c \u662f\u5426\u4e0b\u7ebf\uff09 \u7b49\u3002\u6d88\u606f\u4f53\u5728Redis\u5185\u90e8\u91c7\u7528clusterMsgData\u7ed3\u6784\u58f0\u660e\uff0c \u7ed3\u6784\u5982\u4e0b\uff1a<\/p>\n
          union clusterMsgData {\n    \/* ping,meet,pong\u6d88\u606f\u4f53*\/\n    struct {\n        \/* gossip\u6d88\u606f\u7ed3\u6784\u6570\u7ec4 *\/\n        clusterMsgDataGossip gossip[1];\n    } ping;\n    \n    \/* FAIL \u6d88\u606f\u4f53 *\/\n    struct {\n        clusterMsgDataFail about;\n    } fail;\n    \/\/ ...\n};<\/pre>\n
                  \u6d88\u606f\u4f53clusterMsgData\u5b9a\u4e49\u53d1\u9001\u6d88\u606f\u7684\u6570\u636e\uff0c \u5176\u4e2dping\u3001 meet\u3001 pong\u90fd\u91c7\u7528cluster MsgDataGossip\u6570\u7ec4\u4f5c\u4e3a\u6d88\u606f\u4f53\u6570\u636e\uff0c \u5b9e\u9645\u6d88\u606f\u7c7b\u578b\u4f7f\u7528\u6d88\u606f\u5934\u7684type\u5c5e\u6027\u533a\u5206\u3002 \u6bcf\u4e2a\u6d88\u606f\u4f53\u5305\u542b\u8be5\u8282\u70b9\u7684\u591a\u4e2aclusterMsgDataGossip\u7ed3\u6784\u6570\u636e\uff0c \u7528\u4e8e\u4fe1\u606f\u4ea4\u6362\uff0c \u7ed3\u6784\u5982\u4e0b\uff1a<\/p>\n
          typedef struct {\n    char nodename[CLUSTER_NAMELEN]; \/* \u8282\u70b9\u7684nodeId *\/\n    uint32_t ping_sent; \/* \u6700\u540e\u4e00\u6b21\u5411\u8be5\u8282\u70b9\u53d1\u9001ping\u6d88\u606f\u65f6\u95f4 *\/\n    uint32_t pong_received; \/* \u6700\u540e\u4e00\u6b21\u63a5\u6536\u8be5\u8282\u70b9pong\u6d88\u606f\u65f6\u95f4 *\/\n    char ip[NET_IP_STR_LEN]; \/* IP *\/\n    uint16_t port; \/* port*\/\n    uint16_t flags; \/* \u8be5\u8282\u70b9\u6807\u8bc6, *\/\n} clusterMsgDataGossip;<\/pre>\n
                  \u5f53\u63a5\u6536\u5230ping\u3001 meet\u6d88\u606f\u65f6\uff0c \u63a5\u6536\u8282\u70b9\u4f1a\u89e3\u6790\u6d88\u606f\u5185\u5bb9\u5e76\u6839\u636e\u81ea\u8eab\u7684\u8bc6\u522b\u60c5\u51b5\u505a\u51fa\u76f8\u5e94\u5904\u7406\uff0c \u5bf9\u5e94\u6d41\u7a0b\u5982\u4e0b\u56fe\u6240\u793a\uff1a<\/p>\n
          <\/p>\n
          \u63a5\u6536\u8282\u70b9\u6536\u5230ping\/meet\u6d88\u606f\u65f6\uff0c \u6267\u884c\u89e3\u6790\u6d88\u606f\u5934\u548c\u6d88\u606f\u4f53\u6d41\u7a0b\uff1a<\/p>\n
            \n
          • \u89e3\u6790\u6d88\u606f\u5934\u8fc7\u7a0b\uff1a<\/li>\n<\/ul>\n
            \u6d88\u606f\u5934\u5305\u542b\u4e86\u53d1\u9001\u8282\u70b9\u7684\u4fe1\u606f\uff0c \u5982\u679c\u53d1\u9001\u8282\u70b9\u662f\u65b0\u8282\u70b9\u4e14\u6d88\u606f\u662fmeet\u7c7b\u578b\uff0c \u5219\u52a0\u5165\u5230\u672c\u5730\u8282\u70b9\u5217\u8868\uff1b \u5982\u679c\u662f\u5df2\u77e5\u8282\u70b9\uff0c \u5219\u5c1d\u8bd5\u66f4\u65b0\u53d1\u9001\u8282\u70b9\u7684\u72b6\u6001\uff0c \u5982\u69fd\u6620\u5c04\u5173\u7cfb\u3001 \u4e3b\u4ece\u89d2\u8272\u7b49\u72b6\u6001\u3002<\/p>\n
              \n
            • \u89e3\u6790\u6d88\u606f\u4f53\u8fc7\u7a0b\uff1a<\/li>\n<\/ul>\n
              \u5982\u679c\u6d88\u606f\u4f53\u7684clusterMsgDataGossip\u6570\u7ec4\u5305\u542b\u7684\u8282\u70b9\u662f\u65b0\u8282\u70b9\uff0c \u5219\u5c1d\u8bd5\u53d1\u8d77\u4e0e\u65b0\u8282\u70b9\u7684meet\u63e1\u624b\u6d41\u7a0b\uff1b \u5982\u679c\u662f\u5df2\u77e5\u8282\u70b9\uff0c \u5219\u6839\u636ecluster MsgDataGossip\u4e2d\u7684flags\u5b57\u6bb5\u5224\u65ad\u8be5\u8282\u70b9\u662f\u5426\u4e0b\u7ebf\uff0c \u7528\u4e8e\u6545\u969c\u8f6c\u79fb\u3002
              \u6d88\u606f\u5904\u7406\u5b8c\u540e\u56de\u590dpong\u6d88\u606f\uff0c \u5185\u5bb9\u540c\u6837\u5305\u542b\u6d88\u606f\u5934\u548c\u6d88\u606f\u4f53\uff0c \u53d1\u9001\u8282\u70b9\u63a5\u6536\u5230\u56de\u590d\u7684pong\u6d88\u606f\u540e\uff0c \u91c7\u7528\u7c7b\u4f3c\u7684\u6d41\u7a0b\u89e3\u6790\u5904\u7406\u6d88\u606f\u5e76\u66f4\u65b0\u4e0e\u63a5\u6536\u8282\u70b9\u6700\u540e\u901a\u4fe1\u65f6\u95f4\uff0c \u5b8c\u6210\u4e00\u6b21\u6d88\u606f\u901a\u4fe1\u3002<\/p>\n
              \u8282\u70b9\u9009\u62e9<\/h2>\n
                      \u867d\u7136Gossip\u534f\u8bae\u7684\u4fe1\u606f\u4ea4\u6362\u673a\u5236\u5177\u6709\u5929\u7136\u7684\u5206\u5e03\u5f0f\u7279\u6027\uff0c \u4f46\u5b83\u662f\u6709\u6210\u672c\u7684\u3002 \u7531\u4e8e\u5185\u90e8\u9700\u8981\u9891\u7e41\u5730\u8fdb\u884c\u8282\u70b9\u4fe1\u606f\u4ea4\u6362\uff0c \u800cping\/pong\u6d88\u606f\u4f1a\u643a\u5e26\u5f53\u524d\u8282\u70b9\u548c\u90e8\u5206\u5176\u4ed6\u8282\u70b9\u7684\u72b6\u6001\u6570\u636e\uff0c \u52bf\u5fc5\u4f1a\u52a0\u91cd\u5e26\u5bbd\u548c\u8ba1\u7b97\u7684\u8d1f\u62c5\u3002 Redis\u96c6\u7fa4\u5185\u8282\u70b9\u901a\u4fe1\u91c7\u7528\u56fa\u5b9a\u9891\u7387\uff08\u5b9a\u65f6\u4efb\u52a1\u6bcf\u79d2\u6267\u884c10\u6b21\uff09 \u3002 \u56e0\u6b64\u8282\u70b9\u6bcf\u6b21\u9009\u62e9\u9700\u8981\u901a\u4fe1\u7684\u8282\u70b9\u5217\u8868\u53d8\u5f97\u975e\u5e38\u91cd\u8981\u3002 \u901a\u4fe1\u8282\u70b9\u9009\u62e9\u8fc7\u591a\u867d\u7136\u53ef\u4ee5\u505a\u5230\u4fe1\u606f\u53ca\u65f6\u4ea4\u6362\u4f46\u6210\u672c\u8fc7\u9ad8\u3002 \u8282\u70b9\u9009\u62e9\u8fc7\u5c11\u4f1a\u964d\u4f4e\u96c6\u7fa4\u5185\u6240\u6709\u8282\u70b9\u5f7c\u6b64\u4fe1\u606f\u4ea4\u6362\u9891\u7387\uff0c\u4ece\u800c\u5f71\u54cd\u6545\u969c\u5224\u5b9a\u3001 \u65b0\u8282\u70b9\u53d1\u73b0\u7b49\u9700\u6c42\u7684\u901f\u5ea6\u3002 \u56e0\u6b64Redis\u96c6\u7fa4\u7684Gossip\u534f\u8bae\u9700\u8981\u517c\u987e\u4fe1\u606f\u4ea4\u6362\u5b9e\u65f6\u6027\u548c\u6210\u672c\u5f00\u9500\uff0c \u901a\u4fe1\u8282\u70b9\u9009\u62e9\u7684\u89c4\u5219\u5982\u4e0b\u56fe\u6240\u793a<\/p>\n
              <\/p>\n
                      \u6839\u636e\u901a\u4fe1\u8282\u70b9\u9009\u62e9\u7684\u6d41\u7a0b\u53ef\u4ee5\u770b\u51fa\u6d88\u606f\u4ea4\u6362\u7684\u6210\u672c\u4e3b\u8981\u4f53\u73b0\u5728\u5355\u4f4d\u65f6\u95f4\u9009\u62e9\u53d1\u9001\u6d88\u606f\u7684\u8282\u70b9\u6570\u91cf\u548c\u6bcf\u4e2a\u6d88\u606f\u643a\u5e26\u7684\u6570\u636e\u91cf\u3002<\/p>\n
              1.\u9009\u62e9\u53d1\u9001\u6d88\u606f\u7684\u8282\u70b9\u6570\u91cf<\/h3>\n
                      \u96c6\u7fa4\u5185\u6bcf\u4e2a\u8282\u70b9\u7ef4\u62a4\u5b9a\u65f6\u4efb\u52a1\u9ed8\u8ba4\u6bcf\u79d2\u6267\u884c10\u6b21\uff0c \u6bcf\u79d2\u4f1a\u968f\u673a\u9009\u53d65\u4e2a\u8282\u70b9\u627e\u51fa\u6700\u4e45\u6ca1\u6709\u901a\u4fe1\u7684\u8282\u70b9\u53d1\u9001ping\u6d88\u606f\uff0c \u7528\u4e8e\u4fdd\u8bc1Gossip\u4fe1\u606f\u4ea4\u6362\u7684\u968f\u673a\u6027\u3002 \u6bcf100\u6beb\u79d2\u90fd\u4f1a\u626b\u63cf\u672c\u5730\u8282\u70b9\u5217\u8868\uff0c \u5982\u679c\u53d1\u73b0\u8282\u70b9\u6700\u8fd1\u4e00\u6b21\u63a5\u53d7pong\u6d88\u606f\u7684\u65f6\u95f4\u5927\u4e8ecluster_node_timeout\/2\uff0c \u5219\u7acb\u523b\u53d1\u9001ping\u6d88\u606f\uff0c \u9632\u6b62\u8be5\u8282\u70b9\u4fe1\u606f\u592a\u957f\u65f6\u95f4\u672a\u66f4\u65b0\u3002 \u6839\u636e\u4ee5\u4e0a\u89c4\u5219\u5f97\u51fa\u6bcf\u4e2a\u8282\u70b9\u6bcf\u79d2\u9700\u8981\u53d1\u9001ping\u6d88\u606f\u7684\u6570
              \u91cf=1+10*num\uff08node.pong_received>cluster_node_timeout\/2\uff09 \uff0c \u56e0\u6b64cluster_node_timeout\u53c2\u6570\u5bf9\u6d88\u606f\u53d1\u9001\u7684\u8282\u70b9\u6570\u91cf\u5f71\u54cd\u975e\u5e38\u5927\u3002 \u5f53\u6211\u4eec\u7684\u5e26\u5bbd\u8d44\u6e90\u7d27\u5f20\u65f6\uff0c \u53ef\u4ee5\u9002\u5f53\u8c03\u5927\u8fd9\u4e2a\u53c2\u6570\uff0c \u5982\u4ece\u9ed8\u8ba415\u79d2\u6539\u4e3a30\u79d2\u6765\u964d\u4f4e\u5e26\u5bbd\u5360\u7528\u7387\u3002 \u8fc7\u5ea6\u8c03\u5927cluster_node_timeout\u4f1a\u5f71\u54cd\u6d88\u606f\u4ea4\u6362\u7684\u9891\u7387\u4ece\u800c\u5f71\u54cd\u6545\u969c\u8f6c\u79fb\u3001 \u69fd\u4fe1\u606f\u66f4\u65b0\u3001 \u65b0\u8282\u70b9\u53d1\u73b0\u7684\u901f\u5ea6\u3002 \u56e0\u6b64\u9700\u8981\u6839\u636e\u4e1a\u52a1\u5bb9\u5fcd\u5ea6\u548c\u8d44\u6e90\u6d88\u8017\u8fdb\u884c\u5e73\u8861\u3002 \u540c\u65f6\u6574\u4e2a\u96c6\u7fa4\u6d88\u606f\u603b\u4ea4\u6362\u91cf\u4e5f\u8ddf\u8282\u70b9\u6570\u6210\u6b63\u6bd4\u3002<\/p>\n
              2.\u6d88\u606f\u6570\u636e\u91cf<\/h3>\n
                      \u6bcf\u4e2aping\u6d88\u606f\u7684\u6570\u636e\u91cf\u4f53\u73b0\u5728\u6d88\u606f\u5934\u548c\u6d88\u606f\u4f53\u4e2d\uff0c \u5176\u4e2d\u6d88\u606f\u5934\u4e3b\u8981\u5360\u7528\u7a7a\u95f4\u7684\u5b57\u6bb5\u662fmyslots[CLUSTER_SLOTS\/8]\uff0c \u5360\u75282KB\uff0c \u8fd9\u5757\u7a7a\u95f4\u5360\u7528\u76f8\u5bf9\u56fa\u5b9a\u3002 \u6d88\u606f\u4f53\u4f1a\u643a\u5e26\u4e00\u5b9a\u6570\u91cf\u7684\u5176\u4ed6\u8282\u70b9\u4fe1\u606f\u7528\u4e8e\u4fe1\u606f\u4ea4\u6362\u3002 \u5177\u4f53\u6570\u91cf\u89c1\u4ee5\u4e0b\u4f2a\u4ee3\u7801\uff1a<\/p>\n
              def get_wanted():\n    int total_size = size(cluster.nodes)\n    \n    # \u9ed8\u8ba4\u5305\u542b\u8282\u70b9\u603b\u91cf\u76841\/10\n    594int wanted = floor(total_size\/10);\n    if wanted  total_size -2 :\n    # \u6700\u591a\u5305\u542btotal_size - 2\u4e2a\n    wanted = total_size - 2;\n    return wanted;<\/pre>\n
                      \u6839\u636e\u4f2a\u4ee3\u7801\u53ef\u4ee5\u770b\u51fa\u6d88\u606f\u4f53\u643a\u5e26\u6570\u636e\u91cf\u8ddf\u96c6\u7fa4\u7684\u8282\u70b9\u6570\u606f\u606f\u76f8\u5173\uff0c \u66f4\u5927\u7684\u96c6\u7fa4\u6bcf\u6b21\u6d88\u606f\u901a\u4fe1\u7684\u6210\u672c\u4e5f\u5c31\u66f4\u9ad8\uff0c \u56e0\u6b64\u5bf9\u4e8eRedis\u96c6\u7fa4\u6765\u8bf4\u5e76\u4e0d\u662f\u5927\u800c\u5168\u7684\u96c6\u7fa4\u66f4\u597d\uff0c \u5bf9\u4e8e\u96c6\u7fa4\u89c4\u6a21\u63a7\u5236\u7684\u5efa\u8bae\u89c1\u4e4b\u540e\u201c\u96c6\u7fa4\u8fd0\u7ef4\u201d\u3002<\/p>\n
              \u5176\u4ed6\u7f51\u5740<\/h2>\n
              \u300aRedis\u5f00\u53d1\u4e0e\u8fd0\u7ef4\u300b=> \u7b2c10\u7ae0 \u96c6\u7fa4=> 10.3 \u8282\u70b9\u901a\u4fe1<\/p>\n","protected":false},"excerpt":{"rendered":"
              Redis\u96c6\u7fa4\u8282\u70b9\u901a\u4fe1\u8fc7\u7a0b\/\u539f\u7406...<\/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-201205","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/201205","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=201205"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/201205\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=201205"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=201205"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=201205"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}