1\u3001\u590d\u5236\u8fdb\u7a0b
Mysql\u7684\u590d\u5236\uff08Replication\uff09\u662f\u4e00\u4e2a\u5f02\u6b65\u7684\u590d\u5236\uff0c\u4ece\u4e00\u4e2aMysql instace\uff08\u79f0\u4e4b\u4e3aMaster\uff09\u590d\u5236\u5230\u53e6\u4e00\u4e2aMysql instance\uff08\u79f0\u4e4bSlave\uff09\u3002\u5b9e\u73b0\u6574\u4e2a\u590d\u5236\u64cd\u4f5c\u4e3b\u8981\u7531\u4e09\u4e2a\u8fdb\u7a0b\u5b8c\u6210\u7684\uff0c\u5176\u4e2d\u4e24\u4e2a\u8fdb\u7a0b\u5728Slave\uff08Sql\u8fdb\u7a0b\u548cIO\u8fdb\u7a0b\uff09\uff0c\u53e6\u5916\u4e00\u4e2a\u8fdb\u7a0b\u5728 Master\uff08IO\u8fdb\u7a0b\uff09\u4e0a\u3002
\u8981\u5b9e\u65bd\u590d\u5236\uff0c\u9996\u5148\u5fc5\u987b\u6253\u5f00Master\u7aef\u7684binary log\uff08bin-log\uff09\u529f\u80fd\uff0c\u5426\u5219\u65e0\u6cd5\u5b9e\u73b0\u3002\u56e0\u4e3a\u6574\u4e2a\u590d\u5236\u8fc7\u7a0b\u5b9e\u9645\u4e0a\u5c31\u662fSlave\u4eceMaster\u7aef\u83b7\u53d6\u8be5\u65e5\u5fd7\u7136\u540e\u518d\u5728\u81ea\u5df1\u8eab\u4e0a\u5b8c\u5168\u987a\u5e8f\u7684\u6267\u884c\u65e5\u5fd7\u4e2d\u6240\u8bb0\u5f55\u7684\u5404\u79cd\u64cd\u4f5c\u3002
\u590d\u5236\u7684\u57fa\u672c\u8fc7\u7a0b\u5982\u4e0b\uff1a
1)\u3001Slave\u4e0a\u9762\u7684IO\u8fdb\u7a0b\u8fde\u63a5\u4e0aMaster\uff0c\u5e76\u8bf7\u6c42\u4ece\u6307\u5b9a\u65e5\u5fd7\u6587\u4ef6\u7684\u6307\u5b9a\u4f4d\u7f6e\uff08\u6216\u8005\u4ece\u6700\u5f00\u59cb\u7684\u65e5\u5fd7\uff09\u4e4b\u540e\u7684\u65e5\u5fd7\u5185\u5bb9\uff1b<\/p>\n
2)\u3001Master\u63a5\u6536\u5230\u6765\u81eaSlave\u7684IO\u8fdb\u7a0b\u7684\u8bf7\u6c42\u540e\uff0c\u901a\u8fc7\u8d1f\u8d23\u590d\u5236\u7684IO\u8fdb\u7a0b\u6839\u636e\u8bf7\u6c42\u4fe1\u606f\u8bfb\u53d6\u5236\u5b9a\u65e5\u5fd7\u6307\u5b9a\u4f4d\u7f6e\u4e4b\u540e\u7684\u65e5\u5fd7\u4fe1\u606f\uff0c\u8fd4\u56de\u7ed9Slave \u7684IO\u8fdb\u7a0b\u3002\u8fd4\u56de\u4fe1\u606f\u4e2d\u9664\u4e86\u65e5\u5fd7\u6240\u5305\u542b\u7684\u4fe1\u606f\u4e4b\u5916\uff0c\u8fd8\u5305\u62ec\u672c\u6b21\u8fd4\u56de\u7684\u4fe1\u606f\u5df2\u7ecf\u5230Master\u7aef\u7684bin-log\u6587\u4ef6\u7684\u540d\u79f0\u4ee5\u53cabin-log\u7684\u4f4d\u7f6e\uff1b<\/p>\n
3)\u3001Slave\u7684IO\u8fdb\u7a0b\u63a5\u6536\u5230\u4fe1\u606f\u540e\uff0c\u5c06\u63a5\u6536\u5230\u7684\u65e5\u5fd7\u5185\u5bb9\u4f9d\u6b21\u6dfb\u52a0\u5230Slave\u7aef\u7684relay-log\u6587\u4ef6\u7684\u6700\u672b\u7aef\uff0c\u5e76\u5c06\u8bfb\u53d6\u5230\u7684Master\u7aef\u7684 bin-log\u7684\u6587\u4ef6\u540d\u548c\u4f4d\u7f6e\u8bb0\u5f55\u5230master-info\u6587\u4ef6\u4e2d\uff0c\u4ee5\u4fbf\u5728\u4e0b\u4e00\u6b21\u8bfb\u53d6\u7684\u65f6\u5019\u80fd\u591f\u6e05\u695a\u7684\u544a\u8bc9Master\u201c\u6211\u9700\u8981\u4ece\u67d0\u4e2abin-log\u7684\u54ea\u4e2a\u4f4d\u7f6e\u5f00\u59cb\u5f80\u540e\u7684\u65e5\u5fd7\u5185\u5bb9\uff0c\u8bf7\u53d1\u7ed9\u6211\u201d\uff1b<\/p>\n
4)\u3001Slave\u7684Sql\u8fdb\u7a0b\u68c0\u6d4b\u5230relay-log\u4e2d\u65b0\u589e\u52a0\u4e86\u5185\u5bb9\u540e\uff0c\u4f1a\u9a6c\u4e0a\u89e3\u6790relay-log\u7684\u5185\u5bb9\u6210\u4e3a\u5728Master\u7aef\u771f\u5b9e\u6267\u884c\u65f6\u5019\u7684\u90a3\u4e9b\u53ef\u6267\u884c\u7684\u5185\u5bb9\uff0c\u5e76\u5728\u81ea\u8eab\u6267\u884c\u3002
\u5b9e\u9645\u4e0a\u5728\u8001\u7248\u672c\u7684Mysql\u7684\u590d\u5236\u5b9e\u73b0\u5728Slave\u7aef\u5e76\u4e0d\u662f\u4e24\u4e2a\u8fdb\u7a0b\u5b8c\u6210\u7684\uff0c\u800c\u662f\u7531\u4e00\u4e2a\u8fdb\u7a0b\u5b8c\u6210\u3002\u4f46\u662f\u540e\u6765\u53d1\u73b0\u8fd9\u6837\u505a\u5b58\u5728\u8f83\u5927\u7684\u98ce\u9669\u548c\u6027\u80fd\u95ee\u9898\uff0c\u4e3b\u8981\u5982\u4e0b\uff1a
\u9996\u5148\uff0c\u4e00\u4e2a\u8fdb\u7a0b\u5c31\u4f7f\u590d\u5236bin-log\u65e5\u5fd7\u548c\u89e3\u6790\u65e5\u5fd7\u5e76\u5728\u81ea\u8eab\u6267\u884c\u7684\u8fc7\u7a0b\u6210\u4e3a\u4e00\u4e2a\u4e32\u884c\u7684\u8fc7\u7a0b\uff0c\u6027\u80fd\u53d7\u5230\u4e86\u4e00\u5b9a\u7684\u9650\u5236\uff0c\u5f02\u6b65\u590d\u5236\u7684\u5ef6\u8fdf\u4e5f\u4f1a\u6bd4\u8f83\u957f\u3002
\u53e6\u5916\uff0cSlave\u7aef\u4eceMaster\u7aef\u83b7\u53d6bin-log\u8fc7\u6765\u4e4b\u540e\uff0c\u9700\u8981\u63a5\u7740\u89e3\u6790\u65e5\u5fd7\u5185\u5bb9\uff0c\u7136\u540e\u5728\u81ea\u8eab\u6267\u884c\u3002\u5728\u8fd9\u4e2a\u8fc7\u7a0b\u4e2d\uff0cMaster\u7aef\u53ef\u80fd\u53c8\u4ea7\u751f\u4e86\u5927\u91cf\u53d8\u5316\u5e76\u58f0\u79f0\u4e86\u5927\u91cf\u7684\u65e5\u5fd7\u3002\u5982\u679c\u5728\u8fd9\u4e2a\u9636\u6bb5Master\u7aef\u7684\u5b58\u50a8\u51fa\u73b0\u4e86\u65e0\u6cd5\u4fee\u590d\u7684\u9519\u8bef\uff0c\u90a3\u4e48\u5728\u8fd9\u4e2a\u9636\u6bb5\u6240\u4ea7\u751f\u7684\u6240\u6709\u53d8\u66f4\u90fd\u5c06\u6c38\u8fdc\u65e0\u6cd5\u627e\u56de\u3002\u5982\u679c\u5728Slave \u7aef\u7684\u538b\u529b\u6bd4\u8f83\u5927\u7684\u65f6\u5019\uff0c\u8fd9\u4e2a\u8fc7\u7a0b\u7684\u65f6\u95f4\u53ef\u80fd\u4f1a\u6bd4\u8f83\u957f\u3002
\u6240\u4ee5\uff0c\u540e\u9762\u7248\u672c\u7684Mysql\u4e3a\u4e86\u89e3\u51b3\u8fd9\u4e2a\u98ce\u9669\u5e76\u63d0\u9ad8\u590d\u5236\u7684\u6027\u80fd\uff0c\u5c06Slave\u7aef\u7684\u590d\u5236\u6539\u4e3a\u4e24\u4e2a\u8fdb\u7a0b\u6765\u5b8c\u6210\u3002\u63d0\u51fa\u8fd9\u4e2a\u6539\u8fdb\u65b9\u6848\u7684\u4eba\u662fYahoo!\u7684\u4e00\u4f4d\u5de5\u7a0b\u5e08\u201cJeremy Zawodny\u201d\u3002\u8fd9\u6837\u65e2\u89e3\u51b3\u4e86\u6027\u80fd\u95ee\u9898\uff0c\u53c8\u7f29\u77ed\u4e86\u5f02\u6b65\u7684\u5ef6\u65f6\u65f6\u95f4\uff0c\u540c\u65f6\u4e5f\u51cf\u5c11\u4e86\u53ef\u80fd\u5b58\u5728\u7684\u6570\u636e\u4e22\u5931\u91cf\u3002\u5f53\u7136\uff0c\u5373\u4f7f\u662f\u6362\u6210\u4e86\u73b0\u5728\u8fd9\u6837\u4e24\u4e2a\u7ebf\u7a0b\u5904\u7406\u4ee5\u540e\uff0c\u540c\u6837\u4e5f\u8fd8\u662f\u5b58\u5728slave\u6570\u636e\u5ef6\u65f6\u4ee5\u53ca\u6570\u636e\u4e22\u5931\u7684\u53ef\u80fd\u6027\u7684\uff0c\u6bd5\u7adf\u8fd9\u4e2a\u590d\u5236\u662f\u5f02\u6b65\u7684\u3002\u53ea\u8981\u6570\u636e\u7684\u66f4\u6539\u4e0d\u662f\u5728\u4e00\u4e2a\u4e8b\u7269\u4e2d\uff0c\u8fd9\u4e9b\u95ee\u9898\u90fd\u662f\u4f1a\u5b58\u5728\u7684\u3002\u5982\u679c\u8981\u5b8c\u5168\u907f\u514d\u8fd9\u4e9b\u95ee\u9898\uff0c\u5c31\u53ea\u80fd\u7528mysql\u7684cluster\u6765\u89e3\u51b3\u4e86\u3002\u4e0d\u8fc7mysql\u7684cluster\u662f\u5185\u5b58\u6570\u636e\u5e93\u7684\u89e3\u51b3\u65b9\u6848\uff0c\u9700\u8981\u5c06\u6240\u6709\u6570\u636e\u90fdload\u5230\u5185\u5b58\u4e2d\uff0c\u8fd9\u6837\u5c31\u5bf9\u5185\u5b58\u7684\u8981\u6c42\u5c31\u975e\u5e38\u5927\u4e86\uff0c\u5bf9\u4e8e\u4e00\u822c\u7684\u5e94\u7528\u6765\u8bf4\u53ef\u5b9e\u65bd\u6027\u4e0d\u662f\u592a\u5927\u3002<\/p>\n
2\u3001\u590d\u5236\u5b9e\u73b0\u7ea7\u522b
Mysql\u7684\u590d\u5236\u53ef\u4ee5\u662f\u57fa\u4e8e\u4e00\u6761\u8bed\u53e5\uff08Statement level\uff09\uff0c\u4e5f\u53ef\u4ee5\u662f\u57fa\u4e8e\u4e00\u6761\u8bb0\u5f55\uff08Row level\uff09\uff0c\u53ef\u4ee5\u5728Mysql\u7684\u914d\u7f6e\u53c2\u6570\u4e2d\u8bbe\u5b9a\u8fd9\u4e2a\u590d\u5236\u7ea7\u522b\uff0c\u4e0d\u540c\u590d\u5236\u7ea7\u522b\u7684\u8bbe\u7f6e\u4f1a\u5f71\u54cd\u5230Master\u7aef\u7684bin-log\u8bb0\u5f55\u6210\u4e0d\u540c\u7684\u5f62\u5f0f\u3002
Row Level\uff1a\u65e5\u5fd7\u4e2d\u4f1a\u8bb0\u5f55\u6210\u6bcf\u4e00\u884c\u6570\u636e\u88ab\u4fee\u6539\u7684\u5f62\u5f0f\uff0c\u7136\u540e\u5728slave\u7aef\u518d\u5bf9\u76f8\u540c\u7684\u6570\u636e\u8fdb\u884c\u4fee\u6539\u3002
\u4f18\u70b9\uff1a\u5728row level\u6a21\u5f0f\u4e0b\uff0cbin-log\u4e2d\u53ef\u4ee5\u4e0d\u8bb0\u5f55\u6267\u884c\u7684sql\u8bed\u53e5\u7684\u4e0a\u4e0b\u6587\u76f8\u5173\u7684\u4fe1\u606f\uff0c\u4ec5\u4ec5\u53ea\u9700\u8981\u8bb0\u5f55\u90a3\u4e00\u6761\u8bb0\u5f55\u88ab\u4fee\u6539\u4e86\uff0c\u4fee\u6539\u6210\u4ec0\u4e48\u6837\u4e86\u3002\u6240\u4ee5row level\u7684\u65e5\u5fd7\u5185\u5bb9\u4f1a\u975e\u5e38\u6e05\u695a\u7684\u8bb0\u5f55\u4e0b\u6bcf\u4e00\u884c\u6570\u636e\u4fee\u6539\u7684\u7ec6\u8282\uff0c\u975e\u5e38\u5bb9\u6613\u7406\u89e3\u3002\u800c\u4e14\u4e0d\u4f1a\u51fa\u73b0\u67d0\u4e9b\u7279\u5b9a\u60c5\u51b5\u4e0b\u7684\u5b58\u50a8\u8fc7\u7a0b\uff0c\u6216function\uff0c\u4ee5\u53ca trigger\u7684\u8c03\u7528\u548c\u89e6\u53d1\u65e0\u6cd5\u88ab\u6b63\u786e\u590d\u5236\u7684\u95ee\u9898\u3002
\u7f3a\u70b9\uff1arow level\u4e0b\uff0c\u6240\u6709\u7684\u6267\u884c\u7684\u8bed\u53e5\u5f53\u8bb0\u5f55\u5230\u65e5\u5fd7\u4e2d\u7684\u65f6\u5019\uff0c\u90fd\u5c06\u4ee5\u6bcf\u884c\u8bb0\u5f55\u7684\u4fee\u6539\u6765\u8bb0\u5f55\uff0c\u8fd9\u6837\u53ef\u80fd\u4f1a\u4ea7\u751f\u5927\u91cf\u7684\u65e5\u5fd7\u5185\u5bb9\uff0c\u6bd4\u5982\u6709\u8fd9\u6837\u4e00\u6761update\u8bed\u53e5\uff1aupdate product set owner_member_id = \u2018b\u2019 where owner_member_id = \u2018a\u2019\uff0c\u6267\u884c\u4e4b\u540e\uff0c\u65e5\u5fd7\u4e2d\u8bb0\u5f55\u7684\u4e0d\u662f\u8fd9\u6761update\u8bed\u53e5\u6240\u5bf9\u5e94\u989d\u4e8b\u4ef6\uff08mysql\u4ee5\u4e8b\u4ef6\u7684\u5f62\u5f0f\u6765\u8bb0\u5f55bin-log\u65e5\u5fd7\uff09\uff0c\u800c\u662f\u8fd9\u6761\u8bed\u53e5\u6240\u66f4\u65b0\u7684\u6bcf\u4e00\u6761\u8bb0\u5f55\u7684\u53d8\u5316\u60c5\u51b5\uff0c\u8fd9\u6837\u5c31\u8bb0\u5f55\u6210\u5f88\u591a\u6761\u8bb0\u5f55\u88ab\u66f4\u65b0\u7684\u5f88\u591a\u4e2a\u4e8b\u4ef6\u3002\u81ea\u7136\uff0cbin-log\u65e5\u5fd7\u7684\u91cf\u5c31\u4f1a\u5f88\u5927\u3002\u5c24\u5176\u662f\u5f53\u6267\u884calter table\u4e4b\u7c7b\u7684\u8bed\u53e5\u7684\u65f6\u5019\uff0c\u4ea7\u751f\u7684\u65e5\u5fd7\u91cf\u662f\u60ca\u4eba\u7684\u3002\u56e0\u4e3aMysql\u5bf9\u4e8ealter table\u4e4b\u7c7b\u7684\u8868\u7ed3\u6784\u53d8\u66f4\u8bed\u53e5\u7684\u5904\u7406\u65b9\u5f0f\u662f\u6574\u4e2a\u8868\u7684\u6bcf\u4e00\u6761\u8bb0\u5f55\u90fd\u9700\u8981\u53d8\u52a8\uff0c\u5b9e\u9645\u4e0a\u5c31\u662f\u91cd\u5efa\u4e86\u6574\u4e2a\u8868\u3002\u90a3\u4e48\u8be5\u8868\u7684\u6bcf\u4e00\u6761\u8bb0\u5f55\u90fd\u4f1a\u88ab\u8bb0\u5f55\u5230\u65e5\u5fd7\u4e2d\u3002
Statement Level:\u6bcf\u4e00\u6761\u4f1a\u4fee\u6539\u6570\u636e\u7684sql\u90fd\u4f1a\u8bb0\u5f55\u5230 master\u7684bin-log\u4e2d\u3002slave\u5728\u590d\u5236\u7684\u65f6\u5019sql\u8fdb\u7a0b\u4f1a\u89e3\u6790\u6210\u548c\u539f\u6765master\u7aef\u6267\u884c\u8fc7\u7684\u76f8\u540c\u7684sql\u6765\u518d\u6b21\u6267\u884c\u3002
\u4f18\u70b9\uff1astatement level\u4e0b\u7684\u4f18\u70b9\u9996\u5148\u5c31\u662f\u89e3\u51b3\u4e86row level\u4e0b\u7684\u7f3a\u70b9\uff0c\u4e0d\u9700\u8981\u8bb0\u5f55\u6bcf\u4e00\u884c\u6570\u636e\u7684\u53d8\u5316\uff0c\u51cf\u5c11bin-log\u65e5\u5fd7\u91cf\uff0c\u8282\u7ea6IO\uff0c\u63d0\u9ad8\u6027\u80fd\u3002\u56e0\u4e3a\u4ed6\u53ea\u9700\u8981\u8bb0\u5f55\u5728Master\u4e0a\u6240\u6267\u884c\u7684\u8bed\u53e5\u7684\u7ec6\u8282\uff0c\u4ee5\u53ca\u6267\u884c\u8bed\u53e5\u65f6\u5019\u7684\u4e0a\u4e0b\u6587\u7684\u4fe1\u606f\u3002
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3\u3001\u590d\u5236\u5e38\u7528\u67b6\u6784
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Mysql\u4e0d\u652f\u6301\u4e00\u4e2aSlave instance\u4ece\u5c5e\u4e8e\u591a\u4e2aMaster\u7684\u67b6\u6784\u3002\u5c31\u662f\u8bf4\uff0c\u4e00\u4e2aslave instance\u53ea\u80fd\u63a5\u53d7\u4e00\u4e2amaster\u7684\u540c\u6b65\u6e90\uff0c\u542c\u8bf4\u6709patch\u53ef\u4ee5\u6539\u8fdb\u8fd9\u6837\u7684\u529f\u80fd\uff0c\u4f46\u6ca1\u6709\u5b9e\u8df5\u8fc7\u3002Mysql AB\u4e4b\u6240\u4ee5\u4e0d\u5b9e\u73b0\u8fd9\u6837\u7684\u529f\u80fd\uff0c\u4e3b\u8981\u662f\u8003\u8651\u5230\u51b2\u7a81\u89e3\u51b3\u7684\u95ee\u9898\u3002
Mysql\u4e5f\u53ef\u4ee5\u642d\u5efa\u6210dual master\u6a21\u5f0f\uff0c\u4e5f\u5c31\u662f\u8bf4\u4e24\u4e2aMysql instance\u4e92\u4e3a\u5bf9\u65b9\u7684Master\uff0c\u4e5f\u540c\u65f6\u4e3a\u5bf9\u65b9\u7684Slave\u3002\u4e0d\u8fc7\u4e00\u822c\u8fd9\u79cd\u67b6\u6784\u4e5f\u662f\u53ea\u6709\u4e00\u7aef\u63d0\u4f9b\u670d\u52a1\uff0c\u907f\u514d\u51b2\u7a81\u95ee\u9898\u3002\u56e0\u4e3a\u5373\u4f7f\u5728\u4e24\u8fb9\u6267\u884c\u7684\u4fee\u6539\u6709\u5148\u540e\u987a\u5e8f\uff0c\u7531\u4e8e\u590d\u5236\u7684\u5f02\u6b65\u5b9e\u73b0\u673a\u5236\uff0c\u540c\u6837\u4f1a\u5bfc\u81f4\u5373\u4f7f\u5728\u665a\u505a\u7684\u4fee\u6539\u4e5f\u53ef\u80fd\u4f1a\u88ab\u65e9\u505a\u7684\u4fee\u6539\u6240\u8986\u76d6\uff0c\u5c31\u50cf\u5982\u4e0b\u60c5\u5f62\uff1a
\u65f6\u95f4\u70b9 Mysql A Mysql B
1 \u66f4\u65b0x\u8868y\u8bb0\u5f55\u4e3a10
2 \u66f4\u65b0x\u8868y\u8bb0\u5f55\u4e3a20
3 \u83b7\u53d6\u5230A\u65e5\u5fd7\u5e76\u5e94\u7528\uff0c\u66f4\u65b0x\u8868\u7684y\u8bb0\u5f55\u4e3a10\uff08\u4e0d\u7b26\u5408\u671f\u671b\uff09
4 \u83b7\u53d6B\u65e5\u5fd7\u66f4\u65b0x\u8868y\u8bb0\u5f55\u4e3a20\uff08\u7b26\u5408\u671f\u671b\uff09
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