{"id":3266,"date":"2011-11-14T08:58:00","date_gmt":"2011-11-14T00:58:00","guid":{"rendered":"http:\/\/www.orczhou.com\/?p=3266"},"modified":"2024-04-02T09:01:16","modified_gmt":"2024-04-02T01:01:16","slug":"mysql-mha","status":"publish","type":"post","link":"https:\/\/www.orczhou.com\/index.php\/2011\/11\/mysql-mha\/","title":{"rendered":"MySQL MHA"},"content":{"rendered":"\n

7\u6708\u4efdYOSHINORI MATSUNOBU<\/a>\u5728Blog\u4e0aRelease\u4e86\u7b2c\u4e00\u4e2a\u7248\u672c\u7684MySQL Master High Availability manager and tools<\/a>(\u7b80\u79f0MHA)\u3002<\/p>\n\n\n\n

1. Overview<\/h3>\n\n\n\n

\u7528\u4e8e\u81ea\u52a8\u4e3b\u5907\u5207\u6362\uff08Master\u7684Failover\uff09\uff0c\u5207\u6362\u65f6\u95f4\u5927\u7ea6\u662f10-30\u79d2\uff0cMHA\u4e3b\u8981\u7684\u4f18\u52bf\u662f\u89e3\u51b3\u4e86\u4e3b\u5907\u7684\u4e00\u81f4\u6027\u95ee\u9898\uff0c\u662f\u7b2c\u4e09\u65b9\u811a\u672c\u7684\u65b9\u5f0f\uff0c\u5bf9\u539f\u6765\u7684MySQL\u6ca1\u6709\u4efb\u4f55\u5f71\u54cd\uff0c\u4e5f\u4e0d\u9700\u8981\u6539\u53d8\u4efb\u4f55\u539f\u6765\u7684\u67b6\u6784\u90e8\u7f72\u3002\u5f53\u7136\u4e5f\u652f\u6301\u5728\u7ebf\u7684\u8ba1\u5212\u5207\u6362\uff0c\u5207\u6362\u65f6\u95f4\u5927\u7ea6\u4e5f\u5c310.5-2\u79d2\u3010\u53ef\u8bfb\uff0c\u4e0d\u53ef\u5199\u3011<\/p>\n\n\n\n

\u662f\u4e00\u79cd\u7b80\u5355\u3001\u4f18\u96c5\u7684\u9ad8\u53ef\u7528\u89e3\u51b3\u65b9\u6848\uff0c\u6709\u4e00\u4e9b\u529f\u80fd\uff1a<\/p>\n\n\n\n

1.1 \u4e3b\u5e93\u76d1\u63a7\u548cFailover<\/h4>\n\n\n\n

\u5728\u4e00\u4e2a\u914d\u597d\u7684\u4e3b\u4ece\u73af\u5883\u4e2d\uff0cMHA\u80fd\u591f\u5b9e\u65f6\u7684\u76d1\u63a7MySQL\u4e3b\u5e93\uff0c\u5982\u679c\u63a2\u6d4b\u5230\u4e3b\u5e93\u5931\u8d25\uff0c\u5219\u4f1a\u542f\u52a8\u81ea\u52a8\u7684\u5207\u6362\u7a0b\u5e8f(master failover)\u3002\u8fd9\u65f6\uff0cMHA\u80fd\u591f\u4fdd\u8bc1\u6240\u6709\u7684\u5907\u5e93\u4e0a\u7684\u6570\u636e\u90fd\u4e00\u81f4\u3002MHA\u4f1a\u68c0\u67e5\u6240\u6709\u5907\u5e93\u4e0a\u7684relay log\uff0c\u5e76\u4f7f\u7528\u6700\u9760\u524d\u7684relay log\uff0c\u6765\u540c\u6b65\u6240\u6709\u5176\u4ed6\u7684\u5907\u5e93\uff0c\u4fdd\u8bc1\u5404\u4e2a\u5907\u5e93\u7684\u6570\u636e\u4e00\u81f4\u3002MHA\u4e00\u822c\u80fd\u591f\u5f88\u5feb\u5b8c\u6210\u5207\u6362\u5de5\u4f5c\uff1a9-12\u79d2\u6765\u63a2\u6d4b\u4e3b\u5e93\u5931\u8d25\uff0c7-10\u79d2\u6765\u5173\u95edmaster\u6765\u907f\u514d\u8111\u88c2(\u53ef\u9009\u7684)\uff0c\u7136\u540e\u5728\u5404\u4e2a\u843d\u540e\u7684\u5907\u5e93\u4e0a\u5e94\u7528\u6700\u65b0\u7684\u65e5\u5fd7(\u67d0\u4e00\u4e2a\u5907\u5e93\u4e0a\u53d7\u5230\u7684\u6700\u65b0\u7684\u65e5\u5fd7)\u3002\u6574\u4e2adowntime\u5927\u6982\u662f10-30\u79d2\u3002\u53ef\u4ee5\u8bbe\u7f6e\u67d0\u4e00\u4e2a\u5907\u5e93\uff0c\u603b\u662f\u4f18\u5148\u6210\u4e3a\u4e3b\u5e93\uff08\u53ef\u4ee5\u901a\u8fc7\u5728\u914d\u7f6e\u6587\u4ef6\u4e2d\u8bbe\u7f6e\u4f18\u5148\u7ea7\u6765\u5b9e\u73b0\uff09\uff0c\u56e0\u4e3a\u5404\u4e2a\u5907\u5e93\u4f1a\u5168\u90e8\u540c\u6b65\uff0c\u6240\u4ee5\u4efb\u4f55\u4e00\u4e2a\u5907\u5e93\u90fd\u53ef\u4ee5\u6210\u4e3a\u4e3b\u5e93\u3002\u7531\u4e8e\u4e0d\u4e00\u81f4\u5bfc\u81f4\u7684\u5907\u5e93\u5931\u8d25\uff0c\u8fd9\u91cc\u90fd\u53ef\u4ee5\u907f\u514d\u3002<\/p>\n\n\n\n

1.2 \u547d\u4ee4\u884c\u4ea4\u4e92\u5f0f\u5207\u6362\uff08\u624b\u52a8\u5207\u6362\uff09<\/h4>\n\n\n\n

\u4e0d\u76d1\u63a7\uff0c\u76f4\u63a5\u8fdb\u884c\u5207\u6362\u64cd\u4f5c\u3002<\/p>\n\n\n\n

1.3 \u76f4\u63a5\u5207\u6362\uff08\u975e\u4ea4\u4e92\u5f0f\uff09<\/h4>\n\n\n\n

1.4 \u5728\u7ebf\u5207\u6362\u4e3b\u5e93<\/h4>\n\n\n\n

\u6709\u65f6\u5019\uff0c\u9700\u8981\u66f4\u6362\u4e3b\u5e93\uff0c\u4f8b\u5982\u539f\u4e3b\u5e93\u6709\u5df2\u77e5\u7684\u786c\u4ef6\u6545\u969c\uff08RAM\u3001RAID control\u7b49\uff09\u6216\u8005\u6362\u4e0a\u66f4\u597d\u7684\u786c\u4ef6\u7b49\u7b49\u3002\u8fd9\u662f\u4e00\u79cd\u8ba1\u5212\u5207\u6362\uff0cMHA\u80fd\u591f\u975e\u5e38\u5feb\u901f\u3001\u5e76\u4e14\u201c\u4e00\u81f4\u7684\u201d\u7684\u5b8c\u6210\u5207\u6362\u3002\u6240\u8c13\u201c\u4e00\u81f4\u7684\u201d\uff0c\u5373\u907f\u514d\u5728\u5207\u6362\u65f6\uff0c\u539f\u4e3b\u5e93\u4e0a\u8fd8\u5b58\u5728\u5b58\u6d3b\u7684Session\uff0c\u5728\u505a\u4e00\u4e9b\u4e8b\u52a1\uff0c\u5bfc\u81f4\u6570\u636e\u7684\u4e0d\u4e00\u81f4\u3002MHA\u5b8c\u6210\u8fd9\u4e2a\u201c\u4e00\u81f4\u7684\u201d\u5207\u6362\uff0c\u5927\u6982\u4f1a\u67090.5-2\u79d2\u7684\u5199<\/strong>\u963b\u585e\uff0c\u4e00\u822c\u8fd9\u90fd\u662f\u53ef\u4ee5\u63a5\u53d7\u7684\u7ef4\u62a4\u65f6\u95f4\u3002<\/p>\n\n\n\n

2. Master Failover\u7684\u6311\u6218<\/h3>\n\n\n\n
\"\"<\/a><\/figure>\n\n\n\n

\u4e3b\u5e93Failover\u5e76\u6ca1\u6709\u60f3\u8c61\u7684\u90a3\u4e48\u7e41\u7410\u3002\u6211\u4eec\u770b\u770b\u6700\u5178\u578b\u7684MySQL\u90e8\u7f72\u60c5\u51b5\uff1a\u5355\u4e2a\u4e3b\u5e93\u62d6\u591a\u4e2a\u5907\u5e93\u3002\u5f53\u4e3b\u5e93\u6302\u4e86\uff0c\u5219\u9700\u8981\u5148\u627e\u5230\u201c\u6700\u65b0\u201d\u7684Slave\uff0c\u5c06\u5176\u5347\u7ea7\u4e3a\u65b0\u7684\u4e3b\u5e93\uff0c\u5e76\u4e14\u8ba9\u5176\u4ed6\u7684\u5907\u5e93\u90fd\u6307\u5411\u8fd9\u4e2a\u65b0\u4e3b\u5e93\u3002\u8fd9\u5e76\u4e0d\u590d\u6742\u3002\u5f53\u627e\u5230\u201c\u6700\u65b0\u201d\u7684slave\uff0c\u5f88\u5bb9\u6613\u786e\u5b9a\u5176\u4ed6\u5907\u5e93\u54ea\u4e9bevent\u8fd8\u6ca1\u6709\u6536\u5230\uff0c\u5982\u679c\u8fd9\u4e9b\u975e\u201c\u6700\u65b0\u201d\u7684\u5907\u5e93\u4e0d\u95ee\u9752\u7ea2\u7682\u767d\u5c31\u76f4\u63a5\u8fde\u5230\u65b0\u4e3b\u5e93\u4e0a\u7684\u8bdd\uff0c\u5219\u4f1a\u5bfc\u81f4\u4e00\u4e9b\u6570\u636e\u4e0d\u4e00\u81f4\u3002\u4e3a\u4e86\u907f\u514d\u8fd9\u79cd\u4e0d\u4e00\u81f4\uff0c\u5219\u9700\u8981\u786e\u5b9a\u54ea\u4e9b\u662f\u4e22\u5931\u7684events\uff0c\u7136\u540eapply\u5230\u8fd9\u4e9b\u5907\u5e93\u4e0a\uff0c\u518d\u8fde\u65b0\u4e3b\u5e93\u3002\u5982\u679c\u624b\u52a8\u6765\u505a\u8fd9\u4e9b\u4e8b\u513f\u7684\u8bdd\uff0c\u90a3\u5c31\u5341\u5206\u7e41\u7410\u800c\u4e14\u590d\u6742\u3002\u5728\u8fd9\u4e2aSlide\u91cc\u9762\u8be6\u7ec6\u63cf\u8ff0\u4e86\u8fd9\u4e2a\u7ec6\u8282\uff1aAutomated master failover<\/a>
<\/p>\n\n\n\n

Fig: Master Failover: What makes it difficult?<\/p>\n\n\n\n

\u201c\u6700\u65b0\u201d\u7684slave\u8868\u793a\uff1a\u83b7\u5f97\u6700\u591abinlog\u7684\u5907\u5e93\u3002<\/p>\n\n\n\n

Currently most MySQL Replication users have no choice but to perform failover manually on master crashes.
\u5728\u4e3b\u5e93crash\u7684\u65f6\u5019\uff0c\u76ee\u524d\u8fd8\u6ca1\u6709\u4ec0\u4e48\u597d\u529e\u6cd5\u4fdd\u8bc1\u5404\u4e2a\u5907\u5e93\u7684\u4e00\u81f4\u3002\u6240\u4ee5\uff0c\u5f88\u591a\u65f6\u5019\u9700\u8981\u624b\u52a8\u53bb\u505a\u8fd9\u4e9b\u64cd\u4f5c\uff0c\u867d\u7136\u4e3b\u5e93crash\u7684\u65f6\u5019\u4e0d\u591a\uff0c\u4f46\u662f\u4e00\u65e6\u51fa\u73b0\uff0c\u90a3\u5c06\u662f\u201c\u76f8\u5f53\u201d\uff08\u7528\u5b8b\u4e39\u4e39\u7684\u53e3\u6c14\u8bf4\uff09\u7684\u75db\u82e6\u3002<\/p>\n\n\n\n

MHA\u76ee\u6807\u5c31\u662f\u5b9e\u73b0\u8fd9\u6837\u7684\u81ea\u52a8\u6062\u590d\u3002\u8fd9\u4e2a\u6062\u590d\u5305\u62ec\u9009\u5b9a\u65b0\u4e3b\u5e93\u3001\u786e\u5b9a\u5404\u4e2a\u5907\u5e93relay log\u7684\u5dee\u5f02\u3001\u5728\u65b0\u4e3b\u5e93\u4e0a\u5e94\u7528\u5dee\u5f02\u7684relay log\uff0c\u7136\u540e\u5c06\u5176\u4ed6\u5907\u5e93\u6307\u5411\u65b0\u4e3b\u5e93\u3002\u4e00\u822cMHA10-30\u79d2\u53ef\u4ee5\u5b8c\u6210\u5168\u90e8\u7684\u64cd\u4f5c\uff08\u53ef\u80fd\u66f4\u4e45\u5982\u679c\u4f60\u7684\u5907\u5e93\u5ef6\u8fdf\u4e86\u5f88\u4e45\u7684\u8bdd\uff09\u3002<\/p>\n\n\n\n

MHA\u6709\u81ea\u52a8\u548c\u547d\u4ee4\u884c\u5207\u6362\u5de5\u5177\uff0c\u81ea\u52a8\u5207\u6362\u547d\u4ee4”masterha_manager (MHA Manager)”\u7531\u4e3b\u5e93\u76d1\u63a7\u548c\u4e3b\u5e93Failover\u4e24\u90e8\u5206\u7ec4\u6210\u3002masterha_manager\u4e00\u76f4\u76d1\u63a7\u4e3b\u5e93\u662f\u5426\u53ef\u7528\uff0c\u5982\u679c\u53d1\u73b0\u65e0\u6cd5\u8fde\u63a5\u4e3b\u5e93\uff0c\u5219\u53ef\u4ee5\u7acb\u5373\u6267\u884c\u4e00\u4e2a\u975e\u4ea4\u4e92\u662f\u7684\u5207\u6362\u8fc7\u7a0b\u3002<\/p>\n\n\n\n

\u624b\u52a8\u5207\u6362\u547d\u4ee4\uff1amasterha_master_switch\u5148\u68c0\u67e5\u4e3b\u5e93\u662f\u5426\u786e\u5b9e\u6302\u4e86\uff0c\u5982\u679c\u771f\u6302\u4e86\uff0cmasterha_master_switch\u9009\u4e00\u4e2a\u5907\u5e93\u4f5c\u4e3a\u65b0\u4e3b\u5e93\uff08\u4e5f\u53ef\u4ee5\u6307\u5b9a\u4e00\u4e2a\uff09\uff0c\u7136\u540e\u505a\u6062\u590d\u548c\u5207\u6362\u3002\u547d\u4ee4\u884c\u628a\u524d\u9762\u7684\u590d\u6742\u64cd\u4f5c\u5168\u90e8\u90fd\u5c01\u88c5\u8d77\u6765\u4e86\u3002<\/p>\n\n\n\n

\u5f53\u5df2\u7ecf\u6709\u4e86\u81ea\u5df1\u7684\u76d1\u63a7\u7cfb\u7edf\u65f6\uff08\u4f8b\u5982\uff0c\u4f60\u53ef\u4ee5\u4f7f\u7528Pacemake\u4e4b\u7c7b\u7684\u76d1\u63a7\uff09\uff0c\u65e0\u9700\u4f7f\u7528MHA\u7684\u76d1\u63a7\u529f\u80fd\u65f6\uff0c\u8fd9\u4e2a\u529f\u80fd\u53ef\u4ee5\u5e2e\u4f60\u5b9e\u73b0MySQL\u7684\u5207\u6362\u64cd\u4f5c\u3002<\/p>\n\n\n\n

3. MHA\u4f7f\u7528\u6ce8\u610f\u4e8b\u9879<\/h3>\n\n\n\n

\u6ce8\u610f\u4e8b\u9879\uff1a<\/p>\n\n\n\n

    \n
  1. \u68c0\u6d4bMaster\u662f\u5426\u6302\u4e86\uff0c\u53ef\u4ee5\u901a\u8fc7\u4e24\u4e2a\u8def\u7531\u6765\u786e\u8ba4\u3002\u8be6\u7ec6\u53c2\u8003\uff1asecondary_network_script<\/a><\/li>\n\n\n\n
  2. MHA\u5b8c\u6210\u5207\u6362\u540e\uff0c\u5e94\u7528\u8fd8\u9700\u8981\u5b8c\u6210\u5207\u6362\uff0c\u53ef\u4ee5\u901a\u8fc7\u811a\u672c\uff1amaster_ip_failover_script parameter<\/a>\u6765\u5e2e\u52a9\u4f60\u505a\u540e\u7eed\u7684\u5de5\u4f5c\u3002<\/li>\n\n\n\n
  3. \u4e3a\u4e86\u907f\u514d\u8111\u88c2\uff0cMHA\u63d0\u4f9b\u4e86\u4e00\u4e2a\u5173\u95ed\u539fMaster\u7684\u811a\u672cshutdown_script parameter<\/a><\/li>\n\n\n\n
  4. \u53e6\u5916MHA\uff0c\u8fd8\u63d0\u4f9b\u4e86\u4e00\u4e2a\u53d1\u9001Email\u5207\u6362\u62a5\u544a\u7684\u529f\u80fd\uff1areport_script parameter<\/a><\/li>\n\n\n\n
  5. \u9700\u8981\u8003\u8651\u7ea7\u8054\u7684\u60c5\u51b5<\/a><\/li>\n\n\n\n
  6. Relay log\u4e0d\u80fd\u518d\u505a\u81ea\u52a8\u6e05\u9664\u4e86\uff0c\u5426\u5219\u9700\u8981\u7684\u65f6\u5019\u53ef\u80fd\u5c31\u6ca1\u4e86\u3002\u9700\u8981\u624b\u52a8\u6e05\u7406relay log\uff0c\u6e05\u7406relay log\u65f6\u9700\u8981\u6ce8\u610f\uff0c\u6ca1\u6709\u5e94\u7528\u7684relay log\u5343\u4e07\u4e0d\u8981\u6e05\uff0c\u5426\u5219\u5907\u5e93\u5c31\u9700\u8981\u91cd\u65b0\u6307\u5411\u4e86\u3002MHA\u6709\u4e2a\u811a\u672c\u53ef\u4ee5\u505a\u8fd9\u4e2a\u5de5\u4f5c\uff1apurge_relay_logs script<\/a><\/li>\n\n\n\n
  7. \u5728SBR\u65f6\u4e0d\u8981\u4f7f\u7528LOAD DATA INFILE<\/li>\n<\/ol>\n\n\n\n

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

    \u53c2\u8003\u8d44\u6599<\/h3>\n\n\n\n
      \n
    1. MHA Google code\u4e3b\u9875<\/a><\/li>\n\n\n\n
    2. MHA \u6587\u6863\u8d44\u6e90<\/a><\/li>\n\n\n\n
    3. MHA download<\/a><\/li>\n\n\n\n
    4. MHA \u4ecb\u7ecd: Announcing MySQL-MHA: “MySQL Master High Availability manager and tools”<\/a> |<\/li>\n\n\n\n
    5. MHA for MySQL 0.52 released<\/a><\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"

      7\u6708\u4efdYOSHINORI MATSUNOBU\u5728Blog\u4e0aRelease\u4e86\u7b2c\u4e00\u4e2a\u7248\u672c\u7684MySQL Master High Availability manager and tools(\u7b80\u79f0MHA)\u3002 1. Overview \u7528\u4e8e\u81ea\u52a8\u4e3b\u5907\u5207\u6362\uff08Master\u7684Failover\uff09\uff0c\u5207\u6362\u65f6\u95f4\u5927\u7ea6\u662f10-30\u79d2\uff0cMHA\u4e3b\u8981\u7684\u4f18\u52bf\u662f\u89e3\u51b3\u4e86\u4e3b\u5907\u7684\u4e00\u81f4\u6027\u95ee\u9898\uff0c\u662f\u7b2c\u4e09\u65b9\u811a\u672c\u7684\u65b9\u5f0f\uff0c\u5bf9\u539f\u6765\u7684MySQL\u6ca1\u6709\u4efb\u4f55\u5f71\u54cd\uff0c\u4e5f\u4e0d\u9700\u8981\u6539\u53d8\u4efb\u4f55\u539f\u6765\u7684\u67b6\u6784\u90e8\u7f72\u3002\u5f53\u7136\u4e5f\u652f\u6301\u5728\u7ebf\u7684\u8ba1\u5212\u5207\u6362\uff0c\u5207\u6362\u65f6\u95f4\u5927\u7ea6\u4e5f\u5c310.5-2\u79d2\u3010\u53ef\u8bfb\uff0c\u4e0d\u53ef\u5199\u3011 \u662f\u4e00\u79cd\u7b80\u5355\u3001\u4f18\u96c5\u7684\u9ad8\u53ef\u7528\u89e3\u51b3\u65b9\u6848\uff0c\u6709\u4e00\u4e9b\u529f\u80fd\uff1a 1.1 \u4e3b\u5e93\u76d1\u63a7\u548cFailover \u5728\u4e00\u4e2a\u914d\u597d\u7684\u4e3b\u4ece\u73af\u5883\u4e2d\uff0cMHA\u80fd\u591f\u5b9e\u65f6\u7684\u76d1\u63a7MySQL\u4e3b\u5e93\uff0c\u5982\u679c\u63a2\u6d4b\u5230\u4e3b\u5e93\u5931\u8d25\uff0c\u5219\u4f1a\u542f\u52a8\u81ea\u52a8\u7684\u5207\u6362\u7a0b\u5e8f(master failover)\u3002\u8fd9\u65f6\uff0cMHA\u80fd\u591f\u4fdd\u8bc1\u6240\u6709\u7684\u5907\u5e93\u4e0a\u7684\u6570\u636e\u90fd\u4e00\u81f4\u3002MHA\u4f1a\u68c0\u67e5\u6240\u6709\u5907\u5e93\u4e0a\u7684relay log\uff0c\u5e76\u4f7f\u7528\u6700\u9760\u524d\u7684relay log\uff0c\u6765\u540c\u6b65\u6240\u6709\u5176\u4ed6\u7684\u5907\u5e93\uff0c\u4fdd\u8bc1\u5404\u4e2a\u5907\u5e93\u7684\u6570\u636e\u4e00\u81f4\u3002MHA\u4e00\u822c\u80fd\u591f\u5f88\u5feb\u5b8c\u6210\u5207\u6362\u5de5\u4f5c\uff1a9-12\u79d2\u6765\u63a2\u6d4b\u4e3b\u5e93\u5931\u8d25\uff0c7-10\u79d2\u6765\u5173\u95edmaster\u6765\u907f\u514d\u8111\u88c2(\u53ef\u9009\u7684)\uff0c\u7136\u540e\u5728\u5404\u4e2a\u843d\u540e\u7684\u5907\u5e93\u4e0a\u5e94\u7528\u6700\u65b0\u7684\u65e5\u5fd7(\u67d0\u4e00\u4e2a\u5907\u5e93\u4e0a\u53d7\u5230\u7684\u6700\u65b0\u7684\u65e5\u5fd7)\u3002\u6574\u4e2adowntime\u5927\u6982\u662f10-30\u79d2\u3002\u53ef\u4ee5\u8bbe\u7f6e\u67d0\u4e00\u4e2a\u5907\u5e93\uff0c\u603b\u662f\u4f18\u5148\u6210\u4e3a\u4e3b\u5e93\uff08\u53ef\u4ee5\u901a\u8fc7\u5728\u914d\u7f6e\u6587\u4ef6\u4e2d\u8bbe\u7f6e\u4f18\u5148\u7ea7\u6765\u5b9e\u73b0\uff09\uff0c\u56e0\u4e3a\u5404\u4e2a\u5907\u5e93\u4f1a\u5168\u90e8\u540c\u6b65\uff0c\u6240\u4ee5\u4efb\u4f55\u4e00\u4e2a\u5907\u5e93\u90fd\u53ef\u4ee5\u6210\u4e3a\u4e3b\u5e93\u3002\u7531\u4e8e\u4e0d\u4e00\u81f4\u5bfc\u81f4\u7684\u5907\u5e93\u5931\u8d25\uff0c\u8fd9\u91cc\u90fd\u53ef\u4ee5\u907f\u514d\u3002 1.2 \u547d\u4ee4\u884c\u4ea4\u4e92\u5f0f\u5207\u6362\uff08\u624b\u52a8\u5207\u6362\uff09 \u4e0d\u76d1\u63a7\uff0c\u76f4\u63a5\u8fdb\u884c\u5207\u6362\u64cd\u4f5c\u3002 1.3 \u76f4\u63a5\u5207\u6362\uff08\u975e\u4ea4\u4e92\u5f0f\uff09 1.4 \u5728\u7ebf\u5207\u6362\u4e3b\u5e93 \u6709\u65f6\u5019\uff0c\u9700\u8981\u66f4\u6362\u4e3b\u5e93\uff0c\u4f8b\u5982\u539f\u4e3b\u5e93\u6709\u5df2\u77e5\u7684\u786c\u4ef6\u6545\u969c\uff08RAM\u3001RAID control\u7b49\uff09\u6216\u8005\u6362\u4e0a\u66f4\u597d\u7684\u786c\u4ef6\u7b49\u7b49\u3002\u8fd9\u662f\u4e00\u79cd\u8ba1\u5212\u5207\u6362\uff0cMHA\u80fd\u591f\u975e\u5e38\u5feb\u901f\u3001\u5e76\u4e14\u201c\u4e00\u81f4\u7684\u201d\u7684\u5b8c\u6210\u5207\u6362\u3002\u6240\u8c13\u201c\u4e00\u81f4\u7684\u201d\uff0c\u5373\u907f\u514d\u5728\u5207\u6362\u65f6\uff0c\u539f\u4e3b\u5e93\u4e0a\u8fd8\u5b58\u5728\u5b58\u6d3b\u7684Session\uff0c\u5728\u505a\u4e00\u4e9b\u4e8b\u52a1\uff0c\u5bfc\u81f4\u6570\u636e\u7684\u4e0d\u4e00\u81f4\u3002MHA\u5b8c\u6210\u8fd9\u4e2a\u201c\u4e00\u81f4\u7684\u201d\u5207\u6362\uff0c\u5927\u6982\u4f1a\u67090.5-2\u79d2\u7684\u5199\u963b\u585e\uff0c\u4e00\u822c\u8fd9\u90fd\u662f\u53ef\u4ee5\u63a5\u53d7\u7684\u7ef4\u62a4\u65f6\u95f4\u3002 2. Master Failover\u7684\u6311\u6218 \u4e3b\u5e93Failover\u5e76\u6ca1\u6709\u60f3\u8c61\u7684\u90a3\u4e48\u7e41\u7410\u3002\u6211\u4eec\u770b\u770b\u6700\u5178\u578b\u7684MySQL\u90e8\u7f72\u60c5\u51b5\uff1a\u5355\u4e2a\u4e3b\u5e93\u62d6\u591a\u4e2a\u5907\u5e93\u3002\u5f53\u4e3b\u5e93\u6302\u4e86\uff0c\u5219\u9700\u8981\u5148\u627e\u5230\u201c\u6700\u65b0\u201d\u7684Slave\uff0c\u5c06\u5176\u5347\u7ea7\u4e3a\u65b0\u7684\u4e3b\u5e93\uff0c\u5e76\u4e14\u8ba9\u5176\u4ed6\u7684\u5907\u5e93\u90fd\u6307\u5411\u8fd9\u4e2a\u65b0\u4e3b\u5e93\u3002\u8fd9\u5e76\u4e0d\u590d\u6742\u3002\u5f53\u627e\u5230\u201c\u6700\u65b0\u201d\u7684slave\uff0c\u5f88\u5bb9\u6613\u786e\u5b9a\u5176\u4ed6\u5907\u5e93\u54ea\u4e9bevent\u8fd8\u6ca1\u6709\u6536\u5230\uff0c\u5982\u679c\u8fd9\u4e9b\u975e\u201c\u6700\u65b0\u201d\u7684\u5907\u5e93\u4e0d\u95ee\u9752\u7ea2\u7682\u767d\u5c31\u76f4\u63a5\u8fde\u5230\u65b0\u4e3b\u5e93\u4e0a\u7684\u8bdd\uff0c\u5219\u4f1a\u5bfc\u81f4\u4e00\u4e9b\u6570\u636e\u4e0d\u4e00\u81f4\u3002\u4e3a\u4e86\u907f\u514d\u8fd9\u79cd\u4e0d\u4e00\u81f4\uff0c\u5219\u9700\u8981\u786e\u5b9a\u54ea\u4e9b\u662f\u4e22\u5931\u7684events\uff0c\u7136\u540eapply\u5230\u8fd9\u4e9b\u5907\u5e93\u4e0a\uff0c\u518d\u8fde\u65b0\u4e3b\u5e93\u3002\u5982\u679c\u624b\u52a8\u6765\u505a\u8fd9\u4e9b\u4e8b\u513f\u7684\u8bdd\uff0c\u90a3\u5c31\u5341\u5206\u7e41\u7410\u800c\u4e14\u590d\u6742\u3002\u5728\u8fd9\u4e2aSlide\u91cc\u9762\u8be6\u7ec6\u63cf\u8ff0\u4e86\u8fd9\u4e2a\u7ec6\u8282\uff1aAutomated master failover Fig: Master Failover: What makes it difficult? \u201c\u6700\u65b0\u201d\u7684slave\u8868\u793a\uff1a\u83b7\u5f97\u6700\u591abinlog\u7684\u5907\u5e93\u3002 Currently most MySQL Replication users have no choice but to perform failover manually on […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_eb_attr":"","inline_featured_image":false,"_tocer_settings":[],"footnotes":""},"categories":[6,1],"tags":[],"class_list":["post-3266","post","type-post","status-publish","format-standard","hentry","category-mysql","category-simplelife"],"_links":{"self":[{"href":"https:\/\/www.orczhou.com\/index.php\/wp-json\/wp\/v2\/posts\/3266","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.orczhou.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.orczhou.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.orczhou.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.orczhou.com\/index.php\/wp-json\/wp\/v2\/comments?post=3266"}],"version-history":[{"count":19,"href":"https:\/\/www.orczhou.com\/index.php\/wp-json\/wp\/v2\/posts\/3266\/revisions"}],"predecessor-version":[{"id":11139,"href":"https:\/\/www.orczhou.com\/index.php\/wp-json\/wp\/v2\/posts\/3266\/revisions\/11139"}],"wp:attachment":[{"href":"https:\/\/www.orczhou.com\/index.php\/wp-json\/wp\/v2\/media?parent=3266"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.orczhou.com\/index.php\/wp-json\/wp\/v2\/categories?post=3266"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.orczhou.com\/index.php\/wp-json\/wp\/v2\/tags?post=3266"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}