{"id":2217,"date":"2022-03-29T15:03:06","date_gmt":"2022-03-29T07:03:06","guid":{"rendered":"https:\/\/aif.amtbbs.org\/?p=2217"},"modified":"2022-03-29T15:03:06","modified_gmt":"2022-03-29T07:03:06","slug":"mysql-%e4%b8%ba%e4%bb%80%e4%b9%88%e9%9c%80%e8%a6%81%e4%b8%a4%e9%98%b6%e6%ae%b5%e6%8f%90%e4%ba%a4%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/aif.amtbbs.org\/index.php\/2022\/03\/29\/2217\/","title":{"rendered":"MySQL \u4e3a\u4ec0\u4e48\u9700\u8981\u4e24\u9636\u6bb5\u63d0\u4ea4\uff1f"},"content":{"rendered":"
\n
\n

\u4e3a\u4ec0\u4e48\u8981\u4e24\u9636\u6bb5\u63d0\u4ea4?\u4e00\u9636\u6bb5\u63d0\u4ea4\u4e0d\u884c\u5417?<\/p>\n

\u5c0f\u4f19\u4f34\u4eec\u77e5\u9053\uff0cMySQL \u4e2d\u7684\u4e8b\u52a1\u662f\u4e24\u9636\u6bb5\u63d0\u4ea4\uff0c\u6211\u4eec\u89c1\u5230\u7684\u5f88\u591a\u5206\u5e03\u5f0f\u4e8b\u52a1\u4e5f\u90fd\u662f\u4e24\u9636\u6bb5\u63d0\u4ea4\u7684\uff0c\u4f8b\u5982 Seata\uff0c\u90a3\u4e48\u4e3a\u4ec0\u4e48\u8981\u4e24\u9636\u6bb5\u63d0\u4ea4\u5462?\u4e00\u6b21\u76f4\u63a5\u63d0\u4ea4\u4e86\u4e0d\u884c\u5417?\u4eca\u5929\u6211\u4eec\u6765\u804a\u804a\u8fd9\u4e2a\u8bdd\u9898\u3002<\/p>\n

1. \u4ec0\u4e48\u662f\u4e24\u9636\u6bb5\u63d0\u4ea4<\/h2>\n

1.1 binlog \u4e0e redologbinlog<\/h3>\n

binlog<\/h4>\n

\u6211\u4eec\u4e2d\u6587\u4e00\u822c\u79f0\u4f5c\u5f52\u6863\u65e5\u5fd7\uff0c\u5982\u679c\u5927\u5bb6\u770b\u8fc7\u677e\u54e5\u4e4b\u524d\u53d1\u7684 MySQL \u4e3b\u4ece\u642d\u5efa\uff0c\u5e94\u8be5\u5bf9\u8fd9\u4e2a\u65e5\u5fd7\u6709\u5370\u8c61\uff0c\u5f53\u6211\u4eec\u642d\u5efa MySQL \u4e3b\u4ece\u7684\u65f6\u5019\u5c31\u79bb\u4e0d\u5f00 binlog\u3002<\/p>\n

binlog \u662f MySQL Server \u5c42\u7684\u65e5\u5fd7\uff0c\u800c\u4e0d\u662f\u5b58\u50a8\u5f15\u64ce\u81ea\u5e26\u7684\u65e5\u5fd7\uff0c\u5b83\u8bb0\u5f55\u4e86\u6240\u6709\u7684 DDL \u548c DML(\u4e0d\u5305\u542b\u6570\u636e\u67e5\u8be2\u8bed\u53e5)\u8bed\u53e5\uff0c\u800c\u4e14\u662f\u4ee5\u4e8b\u4ef6\u5f62\u5f0f\u8bb0\u5f55\uff0c\u8fd8\u5305\u542b\u8bed\u53e5\u6240\u6267\u884c\u7684\u6d88\u8017\u7684\u65f6\u95f4\u7b49\uff0c\u9700\u8981\u6ce8\u610f\u7684\u662f\uff1a<\/p>\n

    \n
  • binlog \u662f\u4e00\u79cd\u903b\u8f91\u65e5\u5fd7\uff0c\u4ed6\u91cc\u8fb9\u6240\u8bb0\u5f55\u7684\u662f\u4e00\u6761 SQL \u8bed\u53e5\u7684\u539f\u59cb\u903b\u8f91\uff0c\u4f8b\u5982\u7ed9\u67d0\u4e00\u4e2a\u5b57\u6bb5 +1\uff0c\u6ce8\u610f\u8fd9\u4e2a\u533a\u522b\u4e8e redo log \u7684\u7269\u7406\u65e5\u5fd7(\u5728\u67d0\u4e2a\u6570\u636e\u9875\u4e0a\u505a\u4e86\u4ec0\u4e48\u4fee\u6539)\u3002<\/li>\n
  • binlog \u6587\u4ef6\u5199\u6ee1\u540e\uff0c\u4f1a\u81ea\u52a8\u5207\u6362\u5230\u4e0b\u4e00\u4e2a\u65e5\u5fd7\u6587\u4ef6\u7ee7\u7eed\u5199\uff0c\u800c\u4e0d\u4f1a\u8986\u76d6\u4ee5\u524d\u7684\u65e5\u5fd7\uff0c\u8fd9\u4e2a\u4e5f\u533a\u522b\u4e8e redo log\uff0credo log \u662f\u5faa\u73af\u5199\u5165\u7684\uff0c\u5373\u540e\u9762\u5199\u5165\u7684\u53ef\u80fd\u4f1a\u8986\u76d6\u524d\u9762\u5199\u5165\u7684\u3002<\/li>\n
  • \u4e00\u822c\u6765\u8bf4\uff0c\u6211\u4eec\u5728\u914d\u7f6e binlog \u7684\u65f6\u5019\uff0c\u53ef\u4ee5\u6307\u5b9a binlog \u6587\u4ef6\u7684\u6709\u6548\u671f\uff0c\u8fd9\u6837\u5728\u5230\u671f\u540e\uff0c\u65e5\u5fd7\u6587\u4ef6\u4f1a\u81ea\u52a8\u5220\u9664\uff0c\u8fd9\u6837\u907f\u514d\u5360\u7528\u8f83\u591a\u5b58\u50a8\u7a7a\u95f4\u3002<\/li>\n<\/ul>\n

    \u6839\u636e MySQL \u5b98\u65b9\u6587\u6863\u7684\u4ecb\u7ecd\uff0c\u5f00\u542f binlog \u4e4b\u540e\uff0c\u5927\u6982\u4f1a\u6709 1% \u7684\u6027\u80fd\u635f\u8017\uff0c\u4e0d\u8fc7\u8fd9\u8fd8\u662f\u53ef\u4ee5\u63a5\u53d7\u7684\uff0c\u4e00\u822c\u6765\u8bf4\uff0cbinlog \u6709\u4e24\u4e2a\u91cd\u8981\u7684\u4f7f\u7528\u573a\u666f\uff1a<\/p>\n

      \n
    • MySQL \u4e3b\u4ece\u590d\u5236\u65f6\uff1a\u5728\u4e3b\u673a\u4e0a\u5f00\u542f binlog\uff0c\u4e3b\u673a\u5c06 binlog \u540c\u6b65\u7ed9\u4ece\u673a\uff0c\u4ece\u673a\u901a\u8fc7 binlog \u6765\u540c\u6b65\u6570\u636e\uff0c\u8fdb\u800c\u5b9e\u73b0\u4e3b\u673a\u548c\u4ece\u673a\u7684\u6570\u636e\u540c\u6b65\u3002<\/li>\n
    • MySQL \u6570\u636e\u6062\u590d\uff0c\u901a\u8fc7\u4f7f\u7528 mysqlbinlog \u5de5\u5177\u518d\u7ed3\u5408 binlog \u6587\u4ef6\uff0c\u53ef\u4ee5\u5c06\u6570\u636e\u6062\u590d\u5230\u8fc7\u53bb\u7684\u67d0\u4e00\u65f6\u523b\u3002<\/li>\n<\/ul>\n

      redo log<\/h4>\n

      \u524d\u9762\u6211\u4eec\u8bf4\u7684 binlog \u662f MySQL \u81ea\u5df1\u63d0\u4f9b\u7684\uff0c\u5728 MySQL \u7684 server \u5c42\uff0c\u800c redo log \u5219\u4e0d\u662f MySQL \u63d0\u4f9b\u7684\uff0c\u662f\u5b58\u50a8\u5f15\u64ce InnoDB \u81ea\u5df1\u63d0\u4f9b\u7684\u3002\u6240\u4ee5\u5728 MySQL \u4e2d\u5c31\u5b58\u5728\u4e24\u7c7b\u65e5\u5fd7 binlog \u548c redo log\uff0c\u5b58\u5728\u4e24\u7c7b\u65e5\u5fd7\u65e2\u6709\u5386\u53f2\u539f\u56e0(InnoDB \u6700\u65e9\u4e0d\u662f MySQL \u5b98\u65b9\u5b58\u50a8\u5f15\u64ce)\u4e5f\u6709\u6280\u672f\u539f\u56e0\uff0c\u8fd9\u4e2a\u54b1\u4eec\u4ee5\u540e\u518d\u7ec6\u804a\u3002<\/p>\n

      \u6211\u4eec\u90fd\u77e5\u9053\uff0c\u4e8b\u52a1\u7684\u56db\u5927\u7279\u6027\u91cc\u9762\u6709\u4e00\u4e2a\u662f\u6301\u4e45\u6027\uff0c\u5373\u53ea\u8981\u4e8b\u52a1\u63d0\u4ea4\u6210\u529f\uff0c\u90a3\u4e48\u5bf9\u6570\u636e\u5e93\u505a\u7684\u4fee\u6539\u5c31\u88ab\u6c38\u4e45\u4fdd\u5b58\u4e0b\u6765\u4e86\uff0c\u5199\u5230\u78c1\u76d8\u4e2d\u4e86\uff0c\u600e\u4e48\u505a\u5230\u7684\u5462?\u5176\u5b9e\u6211\u4eec\u5f88\u5bb9\u6613\u60f3\u5230\u662f\u5728\u6bcf\u6b21\u4e8b\u52a1\u63d0\u4ea4\u7684\u65f6\u5019\uff0c\u5c06\u8be5\u4e8b\u52a1\u6d89\u53ca\u4fee\u6539\u7684\u6570\u636e\u9875\u5168\u90e8\u5237\u65b0\u5230\u78c1\u76d8\u4e2d\uff0c\u4e00\u65e6\u5199\u5230\u78c1\u76d8\u4e2d\uff0c\u5c31\u4e0d\u6015\u6570\u636e\u4e22\u5931\u4e86\u3002<\/p>\n

      \u4f46\u662f\u8981\u662f\u6bcf\u6b21\u90fd\u8fd9\u4e48\u641e\uff0c\u6570\u636e\u5e93\u5c31\u4e0d\u77e5\u9053\u6162\u5230\u54ea\u91cc\u53bb\u4e86!\u56e0\u4e3a Innodb \u662f\u4ee5\u9875\u4e3a\u5355\u4f4d\u8fdb\u884c\u78c1\u76d8\u4ea4\u4e92\u7684\uff0c\u800c\u4e00\u4e2a\u4e8b\u52a1\u5f88\u53ef\u80fd\u53ea\u4fee\u6539\u4e00\u4e2a\u6570\u636e\u9875\u91cc\u9762\u7684\u51e0\u4e2a\u5b57\u8282\uff0c\u8fd9\u4e2a\u65f6\u5019\u5c06\u5b8c\u6574\u7684\u6570\u636e\u9875\u5237\u5230\u78c1\u76d8\u7684\u8bdd\uff0c\u4e0d\u4ec5\u6548\u7387\u4f4e\uff0c\u4e5f\u6d6a\u8d39\u8d44\u6e90\u3002\u6548\u7387\u4f4e\u662f\u56e0\u4e3a\u8fd9\u4e9b\u6570\u636e\u9875\u5728\u7269\u7406\u4e0a\u5e76\u4e0d\u8fde\u7eed\uff0c\u5c06\u6570\u636e\u9875\u5237\u5230\u78c1\u76d8\u4f1a\u6d89\u53ca\u5230\u968f\u673a IO\u3002<\/p>\n

      \u6709\u9274\u4e8e\u6b64\uff0cMySQL \u8bbe\u8ba1\u4e86 redo log\uff0c\u5728 redo log \u4e2d\u53ea\u8bb0\u5f55\u4e8b\u52a1\u5bf9\u6570\u636e\u9875\u505a\u4e86\u54ea\u4e9b\u4fee\u6539\u3002\u90a3\u6709\u4eba\u8bf4\uff0c\u5199 redo log \u4e0d\u5c31\u662f\u78c1\u76d8 IO \u5417?\u800c\u5199\u6570\u636e\u5230\u78c1\u76d8\u4e5f\u662f\u78c1\u76d8 IO\uff0c\u65e2\u7136\u90fd\u662f\u78c1\u76d8 IO\uff0c\u90a3\u5e72\u561b\u4e0d\u628a\u76f4\u63a5\u628a\u6570\u636e\u5199\u5230\u78c1\u76d8\u5462?\u8fd8\u8d39\u8fd9\u4e8b!<\/p>\n

      \u6b64\u8a00\u5dee\u77e3\u3002<\/p>\n

      \u5199 redo log \u8ddf\u5199\u6570\u636e\u6709\u4e00\u4e2a\u5f88\u5927\u7684\u5dee\u5f02\uff0c\u90a3\u5c31\u662f redo log \u662f\u987a\u5e8f IO\uff0c\u800c\u5199\u6570\u636e\u6d89\u53ca\u5230\u968f\u673a IO\uff0c\u5199\u6570\u636e\u9700\u8981\u5bfb\u5740\uff0c\u627e\u5230\u5bf9\u5e94\u7684\u4f4d\u7f6e\uff0c\u7136\u540e\u66f4\u65b0\/\u6dfb\u52a0\/\u5220\u9664\uff0c\u800c\u5199 redo log \u5219\u662f\u5728\u4e00\u4e2a\u56fa\u5b9a\u7684\u4f4d\u7f6e\u5faa\u73af\u5199\u5165\uff0c\u662f\u987a\u5e8f IO\uff0c\u6240\u4ee5\u901f\u5ea6\u8981\u9ad8\u4e8e\u5199\u6570\u636e\u3002<\/p>\n

      redo log \u672c\u8eab\u53c8\u5206\u4e3a\uff1a<\/p>\n

        \n
      • \u65e5\u5fd7\u7f13\u51b2(redo log buffer)\uff0c\u8be5\u90e8\u5206\u65e5\u5fd7\u662f\u6613\u5931\u6027\u7684\u3002<\/li>\n
      • \u91cd\u505a\u65e5\u5fd7(redo log file)\uff0c\u8fd9\u662f\u78c1\u76d8\u4e0a\u7684\u65e5\u5fd7\u6587\u4ef6\uff0c\u8be5\u90e8\u5206\u65e5\u5fd7\u662f\u6301\u4e45\u7684\u3002<\/li>\n<\/ul>\n

        MySQL \u6bcf\u6267\u884c\u4e00\u6761 DML \u8bed\u53e5\uff0c\u5148\u5c06\u8bb0\u5f55\u5199\u5165 redo log buffer\uff0c\u540e\u7eed\u5728\u67d0\u4e2a\u65f6\u95f4\u70b9\u518d\u4e00\u6b21\u6027\u5c06\u591a\u4e2a\u64cd\u4f5c\u8bb0\u5f55\u5199\u5230 redo log file\uff0c\u8fd9\u79cd\u5148\u5199\u65e5\u5fd7\u518d\u5199\u78c1\u76d8\u7684\u6280\u672f\u5c31\u662f MySQL \u91cc\u7ecf\u5e38\u8bf4\u5230\u7684 WAL(Write-Ahead Logging) \u6280\u672f(\u9884\u5199\u65e5\u5fd7)\u3002<\/p>\n

        1.2 \u4e24\u9636\u6bb5\u63d0\u4ea4<\/h3>\n

        \u5728 MySQL \u4e2d\uff0c\u4e24\u9636\u6bb5\u63d0\u4ea4\u7684\u4e3b\u89d2\u5c31\u662f binlog \u548c redolog\uff0c\u6211\u4eec\u6765\u770b\u4e00\u4e2a\u4e24\u9636\u6bb5\u63d0\u4ea4\u7684\u6d41\u7a0b\u56fe\uff1a<\/p>\n

        \"\"<\/p>\n

        \u4ece\u4e0a\u56fe\u4e2d\u53ef\u4ee5\u770b\u51fa\uff0c\u5728\u6700\u540e\u63d0\u4ea4\u4e8b\u52a1\u7684\u65f6\u5019\uff0c\u6709 3 \u4e2a\u6b65\u9aa4\uff1a<\/p>\n

          \n
        • \u5199\u5165 redo log\uff0c\u5904\u4e8e prepare \u72b6\u6001\u3002<\/li>\n
        • \u5199 binlog\u3002<\/li>\n
        • \u4fee\u6539 redo log \u72b6\u6001\u53d8\u4e3a commit\u3002<\/li>\n<\/ul>\n

          \u7531\u4e8e redo log \u7684\u63d0\u4ea4\u5206\u4e3a prepare \u548c commit \u4e24\u4e2a\u9636\u6bb5\uff0c\u6240\u4ee5\u79f0\u4e4b\u4e3a\u4e24\u9636\u6bb5\u63d0\u4ea4\u3002<\/p>\n

          2. \u4e3a\u4ec0\u4e48\u9700\u8981\u4e24\u9636\u6bb5\u63d0\u4ea4<\/h3>\n

          \u5982\u679c\u6ca1\u6709\u4e24\u9636\u6bb5\u63d0\u4ea4\uff0c\u90a3\u4e48 binlog \u548c redolog \u7684\u63d0\u4ea4\uff0c\u65e0\u975e\u5c31\u662f\u4e24\u79cd\u5f62\u5f0f\uff1a<\/p>\n

            \n
          • \u5148\u5199 binlog \u518d\u5199 redolog\u3002<\/li>\n
          • \u5148\u5199 redolog \u518d\u5199 binlog\u3002<\/li>\n<\/ul>\n

            \u8fd9\u4e24\u79cd\u60c5\u51b5\u6211\u4eec\u5206\u522b\u6765\u770b\u3002<\/p>\n

            \u5047\u8bbe\u6211\u4eec\u8981\u5411\u8868\u4e2d\u63d2\u5165\u4e00\u6761\u8bb0\u5f55 R\uff0c\u5982\u679c\u662f\u5148\u5199 binlog \u518d\u5199 redolog\uff0c\u90a3\u4e48\u5047\u8bbe binlog \u5199\u5b8c\u540e\u5d29\u6e83\u4e86\uff0c\u6b64\u65f6 redolog \u8fd8\u6ca1\u5199\u3002\u90a3\u4e48\u91cd\u542f\u6062\u590d\u7684\u65f6\u5019\u5c31\u4f1a\u51fa\u95ee\u9898\uff1abinlog \u4e2d\u5df2\u7ecf\u6709 R \u7684\u8bb0\u5f55\u4e86\uff0c\u5f53\u4ece\u673a\u4ece\u4e3b\u673a\u540c\u6b65\u6570\u636e\u7684\u65f6\u5019\u6216\u8005\u6211\u4eec\u4f7f\u7528 binlog \u6062\u590d\u6570\u636e\u7684\u65f6\u5019\uff0c\u5c31\u4f1a\u540c\u6b65\u5230 R \u8fd9\u6761\u8bb0\u5f55;\u4f46\u662f redolog \u4e2d\u6ca1\u6709\u5173\u4e8e R \u7684\u8bb0\u5f55\uff0c\u6240\u4ee5\u5d29\u6e83\u6062\u590d\u4e4b\u540e\uff0c\u63d2\u5165 R \u8bb0\u5f55\u7684\u8fd9\u4e2a\u4e8b\u52a1\u662f\u65e0\u6548\u7684\uff0c\u5373\u6570\u636e\u5e93\u4e2d\u6ca1\u6709\u8be5\u884c\u8bb0\u5f55\uff0c\u8fd9\u5c31\u9020\u6210\u4e86\u6570\u636e\u4e0d\u4e00\u81f4\u3002<\/p>\n

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            \u60c5\u51b5\u4e09\uff1a\u5047\u8bbe redolog \u5904\u4e8e commit \u72b6\u6001\u7684\u65f6\u5019\u5d29\u6e83\u4e86\uff0c\u90a3\u4e48\u91cd\u542f\u540e\u7684\u5904\u7406\u65b9\u6848\u540c\u60c5\u51b5\u4e8c\u3002<\/p>\n

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            \u6765\u6e90\uff1a \u6c5f\u5357\u4e00\u70b9\u96e8<\/p>\n<\/div>\n<\/div>\n

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            \u4e3a\u4ec0\u4e48\u8981\u4e24\u9636\u6bb5\u63d0\u4ea4?\u4e00\u9636\u6bb5\u63d0\u4ea4\u4e0d\u884c\u5417? \u5c0f\u4f19\u4f34\u4eec\u77e5\u9053\uff0cMySQL \u4e2d\u7684\u4e8b\u52a1\u662f\u4e24\u9636\u6bb5\u63d0\u4ea4\uff0c\u6211\u4eec\u89c1\u5230\u7684\u5f88\u591a\u5206\u5e03\u5f0f\u4e8b […]<\/p>\n

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