{"id":1719,"date":"2020-06-23T17:03:20","date_gmt":"2020-06-23T09:03:20","guid":{"rendered":"http:\/\/39.97.231.10\/?p=1719"},"modified":"2020-06-23T17:03:20","modified_gmt":"2020-06-23T09:03:20","slug":"mysql%e4%b9%8bbinlog%e6%97%a5%e5%bf%97%e3%80%81undo%e6%97%a5%e5%bf%97%e3%80%81redo%e6%97%a5%e5%bf%97","status":"publish","type":"post","link":"http:\/\/www.weijing.co\/?p=1719","title":{"rendered":"MySQL\u4e4bbinlog\u65e5\u5fd7\u3001undo\u65e5\u5fd7\u3001redo\u65e5\u5fd7"},"content":{"rendered":"<div>\n<div>\n<div>\n<div>\u4e00\u3001MySQL\u5e38\u7528\u7684\u51e0\u79cd\u65e5\u5fd7<\/div>\n<\/div>\n<\/div>\n<\/div>\n<article>MySQL\u4e3b\u8981\u5305\u542b\u4ee5\u4e0b\u51e0\u79cd\u65e5\u5fd7\uff1a<\/p>\n<ul>\n<li>\u9519\u8bef\u65e5\u5fd7<\/li>\n<li>\u67e5\u8be2\u65e5\u5fd7<\/li>\n<li>\u6162\u67e5\u8be2\u65e5\u5fd7<\/li>\n<li>\u4e8b\u52a1\u65e5\u5fd7 [undo\u65e5\u5fd7(\u56de\u6eda\u65e5\u5fd7)\u3001redo\u65e5\u5fd7(\u91cd\u505a\u65e5\u5fd7)]<\/li>\n<li>\u4e8c\u8fdb\u5236\u65e5\u5fd7\uff08binlog\u65e5\u5fd7\uff09<\/li>\n<\/ul>\n<p>\u672c\u7ae0\u4e3b\u8981\u4ecb\u7ecdbinlog\u65e5\u5fd7\u3001undo\u65e5\u5fd7\u3001redo\u65e5\u5fd7<\/p>\n<h1>\u4e8c\u3001binlog\u65e5\u5fd7<\/h1>\n<h3>1. \u4ec0\u4e48\u662fbinlog?<\/h3>\n<p>\u5728<a href=\\\"https:\/\/www.jianshu.com\/p\/f4a73eb27a1f\\\" target=\\\"_blank\\\" rel=\\\"noopener noreferrer\\\">MySQL\u7684\u57fa\u672c\u67b6\u6784<\/a>\u8fd9\u7bc7\u6587\u7ae0\u4e2d\uff0c\u6211\u4eec\u5206\u4eab\u4e86MySQL\u7684\u57fa\u7840\u67b6\u6784\uff0c\u5176\u4e2d\uff0cbinlog\u65e5\u5fd7\u5c5e\u4e8eServer\u5c42\u7684\u65e5\u5fd7\uff0c\u53ea\u80fd\u7528\u4e8e\u5f52\u6863\uff0c\u6ca1\u6709carsh-safe\u80fd\u529b\u3002<br \/>\nMySQL\u7684\u4e8c\u8fdb\u5236\u65e5\u5fd7\u53ef\u4ee5\u8bf4\u662fMySQL\u6700\u91cd\u8981\u7684\u65e5\u5fd7\u4e86\uff0c\u5b83\u8bb0\u5f55\u4e86\u6240\u6709\u7684DDL\u548cDML(\u9664\u4e86\u6570\u636e\u67e5\u8be2\u8bed\u53e5)\u8bed\u53e5\uff0c\u4ee5\u4e8b\u4ef6\u5f62\u5f0f\u8bb0\u5f55\uff0c\u8fd8\u5305\u542b\u8bed\u53e5\u6240\u6267\u884c\u7684\u6d88\u8017\u7684\u65f6\u95f4\uff0cMySQL\u7684\u4e8c\u8fdb\u5236\u65e5\u5fd7\u662f\u4e8b\u52a1\u5b89\u5168\u578b\u7684\u3002<\/p>\n<h3>2. binlog\u7684\u4f5c\u7528<\/h3>\n<ul>\n<li>\u4e3b\u4ece\u5907\u4efd\uff1aMySQL Replication\u5728Master\u7aef\u5f00\u542fbinlog\uff0cMster\u628a\u5b83\u7684\u4e8c\u8fdb\u5236\u65e5\u5fd7\u4f20\u9012\u7ed9slaves\u6765\u8fbe\u5230\u4e3b\u4ece\u6570\u636e\u4e00\u81f4\u7684\u76ee\u7684\u3002<\/li>\n<li>\u6570\u636e\u6062\u590d\uff1a\u901a\u8fc7\u4f7f\u7528mysqlbinlog\u5de5\u5177\u6765\u4f7f\u6062\u590d\u6570\u636e\u3002<\/li>\n<\/ul>\n<h3>3. binlog\u7684\u65e5\u5fd7\u683c\u5f0f<\/h3>\n<ul>\n<li>\u8bed\u53e5(statement)\uff1a\u9ed8\u8ba4\u7684\u8bb0\u5f55\u683c\u5f0f\uff0c\u6bcf\u4e00\u6761\u4f1a\u4fee\u6539\u6570\u636e\u7684sql\u90fd\u4f1a\u8bb0\u5f55\u5728binlog\u4e2d<br \/>\n\u4f18\u70b9\uff1a\u4e0d\u9700\u8981\u8bb0\u5f55\u6bcf\u4e00\u884c\u7684\u53d8\u5316\uff0c\u51cf\u5c11\u4e86binlog\u65e5\u5fd7\u91cf\uff0c\u8282\u7ea6\u4e86IO\uff0c\u63d0\u9ad8\u6027\u80fd\u3002(\u76f8\u6bd4row\u80fd\u8282\u7ea6\u591a\u5c11\u6027\u80fd\u4e0e\u65e5\u5fd7\u91cf\uff0c\u8fd9\u4e2a\u53d6\u51b3\u4e8e\u5e94\u7528\u7684SQL\u60c5\u51b5\uff0c\u6b63\u5e38\u540c\u4e00\u6761\u8bb0\u5f55\u4fee\u6539\u6216\u8005\u63d2\u5165row\u683c\u5f0f\u6240\u4ea7\u751f\u7684\u65e5\u5fd7\u91cf\u8fd8\u5c0f\u4e8eStatement\u4ea7\u751f\u7684\u65e5\u5fd7\u91cf\uff0c\u4f46\u662f\u8003\u8651\u5230\u5982\u679c\u5e26\u6761\u4ef6\u7684update\u64cd\u4f5c\uff0c\u4ee5\u53ca\u6574\u8868\u5220\u9664\uff0calter\u8868\u7b49\u64cd\u4f5c\uff0cROW\u683c\u5f0f\u4f1a\u4ea7\u751f\u5927\u91cf\u65e5\u5fd7\uff0c\u56e0\u6b64\u5728\u8003\u8651\u662f\u5426\u4f7f\u7528ROW\u683c\u5f0f\u65e5\u5fd7\u65f6\u5e94\u8be5\u8ddf\u636e\u5e94\u7528\u7684\u5b9e\u9645\u60c5\u51b5\uff0c\u5176\u6240\u4ea7\u751f\u7684\u65e5\u5fd7\u91cf\u4f1a\u589e\u52a0\u591a\u5c11\uff0c\u4ee5\u53ca\u5e26\u6765\u7684IO\u6027\u80fd\u95ee\u9898\u3002)<br \/>\n\u7f3a\u70b9\uff1a\u7531\u4e8e\u8bb0\u5f55\u7684\u53ea\u662f\u6267\u884c\u8bed\u53e5\uff0c\u4e3a\u4e86\u8fd9\u4e9b\u8bed\u53e5\u80fd\u5728slave\u4e0a\u6b63\u786e\u8fd0\u884c\uff0c\u56e0\u6b64\u8fd8\u5fc5\u987b\u8bb0\u5f55\u6bcf\u6761\u8bed\u53e5\u5728\u6267\u884c\u7684\u65f6\u5019\u7684\u4e00\u4e9b\u76f8\u5173\u4fe1\u606f\uff0c\u4ee5\u4fdd\u8bc1\u6240\u6709\u8bed\u53e5\u80fd\u5728slave\u5f97\u5230\u548c\u5728master\u7aef\u6267\u884c\u65f6\u5019\u76f8\u540c \u7684\u7ed3\u679c\u3002\u53e6\u5916mysql \u7684\u590d\u5236,\u50cf\u4e00\u4e9b\u7279\u5b9a\u51fd\u6570\u529f\u80fd\uff0cslave\u53ef\u4e0emaster\u4e0a\u8981\u4fdd\u6301\u4e00\u81f4\u4f1a\u6709\u5f88\u591a\u76f8\u5173\u95ee\u9898(\u5982sleep()\u51fd\u6570\uff0c last_insert_id()\uff0c\u4ee5\u53causer-defined functions(udf)\u4f1a\u51fa\u73b0\u95ee\u9898).<br \/>\n\u4f7f\u7528\u4ee5\u4e0b\u51fd\u6570\u7684\u8bed\u53e5\u4e5f\u65e0\u6cd5\u88ab\u590d\u5236\uff1a<br \/>\nLOAD_FILE()<br \/>\nUUID()<br \/>\nUSER()<br \/>\nFOUND_ROWS()<br \/>\nSYSDATE() (\u9664\u975e\u542f\u52a8\u65f6\u542f\u7528\u4e86 &#8211;sysdate-is-now \u9009\u9879)<br \/>\n\u540c\u65f6\u5728INSERT &#8230;SELECT \u4f1a\u4ea7\u751f\u6bd4 RBR \u66f4\u591a\u7684\u884c\u7ea7\u9501<\/li>\n<\/ul>\n<ul>\n<li>\u884c(row)\uff1a\u4e0d\u8bb0\u5f55sql\u8bed\u53e5\u4e0a\u4e0b\u6587\u76f8\u5173\u4fe1\u606f\uff0c\u4ec5\u4fdd\u5b58\u54ea\u6761\u8bb0\u5f55\u88ab\u4fee\u6539<br \/>\n\u4f18\u70b9\uff1a binlog\u4e2d\u53ef\u4ee5\u4e0d\u8bb0\u5f55\u6267\u884c\u7684sql\u8bed\u53e5\u7684\u4e0a\u4e0b\u6587\u76f8\u5173\u7684\u4fe1\u606f\uff0c\u4ec5\u9700\u8981\u8bb0\u5f55\u90a3\u4e00\u6761\u8bb0\u5f55\u88ab\u4fee\u6539\u6210\u4ec0\u4e48\u4e86\u3002\u6240\u4ee5rowlevel\u7684\u65e5\u5fd7\u5185\u5bb9\u4f1a\u975e\u5e38\u6e05\u695a\u7684\u8bb0\u5f55\u4e0b\u6bcf\u4e00\u884c\u6570\u636e\u4fee\u6539\u7684\u7ec6\u8282\u3002\u800c\u4e14\u4e0d\u4f1a\u51fa\u73b0\u67d0\u4e9b\u7279\u5b9a\u60c5\u51b5\u4e0b\u7684\u5b58\u50a8\u8fc7\u7a0b\uff0c\u6216function\uff0c\u4ee5\u53catrigger\u7684\u8c03\u7528\u548c\u89e6\u53d1\u65e0\u6cd5\u88ab\u6b63\u786e\u590d\u5236\u7684\u95ee\u9898<br \/>\n\u7f3a\u70b9:\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,\u6bd4\u5982\u4e00\u6761update\u8bed\u53e5\uff0c\u4fee\u6539\u591a\u6761\u8bb0\u5f55\uff0c\u5219binlog\u4e2d\u6bcf\u4e00\u6761\u4fee\u6539\u90fd\u4f1a\u6709\u8bb0\u5f55\uff0c\u8fd9\u6837\u9020\u6210binlog\u65e5\u5fd7\u91cf\u4f1a\u5f88\u5927\uff0c\u7279\u522b\u662f\u5f53\u6267\u884calter table\u4e4b\u7c7b\u7684\u8bed\u53e5\u7684\u65f6\u5019\uff0c\u7531\u4e8e\u8868\u7ed3\u6784\u4fee\u6539\uff0c\u6bcf\u6761\u8bb0\u5f55\u90fd\u53d1\u751f\u6539\u53d8\uff0c\u90a3\u4e48\u8be5\u8868\u6bcf\u4e00\u6761\u8bb0\u5f55\u90fd\u4f1a\u8bb0\u5f55\u5230\u65e5\u5fd7\u4e2d\u3002<\/li>\n<li>\u6df7\u5408\u6a21\u5f0f(mixed)\uff1a\u662f\u4ee5\u4e0a\u4e24\u79cdlevel\u7684\u6df7\u5408\u4f7f\u7528\u3002<br \/>\n\u4e00\u822c\u7684\u8bed\u53e5\u4fee\u6539\u4f7f\u7528statment\u683c\u5f0f\u4fdd\u5b58binlog\uff0c\u5982\u4e00\u4e9b\u51fd\u6570\uff0cstatement\u65e0\u6cd5\u5b8c\u6210\u4e3b\u4ece\u590d\u5236\u7684\u64cd\u4f5c\uff0c\u5219\u91c7\u7528row\u683c\u5f0f\u4fdd\u5b58binlog,MySQL\u4f1a\u6839\u636e\u6267\u884c\u7684\u6bcf\u4e00\u6761\u5177\u4f53\u7684sql\u8bed\u53e5\u6765\u533a\u5206\u5bf9\u5f85\u8bb0\u5f55\u7684\u65e5\u5fd7\u5f62\u5f0f\uff0c\u4e5f\u5c31\u662f\u5728Statement\u548cRow\u4e4b\u95f4\u9009\u62e9\u4e00\u79cd.\u65b0\u7248\u672c\u7684MySQL\u4e2d\u961frow level\u6a21\u5f0f\u4e5f\u88ab\u505a\u4e86\u4f18\u5316\uff0c\u5e76\u4e0d\u662f\u6240\u6709\u7684\u4fee\u6539\u90fd\u4f1a\u4ee5row level\u6765\u8bb0\u5f55\uff0c\u50cf\u9047\u5230\u8868\u7ed3\u6784\u53d8\u66f4\u7684\u65f6\u5019\u5c31\u4f1a\u4ee5statement\u6a21\u5f0f\u6765\u8bb0\u5f55\u3002\u81f3\u4e8eupdate\u6216\u8005delete\u7b49\u4fee\u6539\u6570\u636e\u7684\u8bed\u53e5\uff0c\u8fd8\u662f\u4f1a\u8bb0\u5f55\u6240\u6709\u884c\u7684\u53d8\u66f4\u3002<br \/>\nMixed\u65e5\u5fd7\u8bf4\u660e\uff1a<br \/>\n\u5728slave\u65e5\u5fd7\u540c\u6b65\u8fc7\u7a0b\u4e2d\uff0c\u5bf9\u4e8e\u4f7f\u7528now\u8fd9\u6837\u7684\u65f6\u95f4\u51fd\u6570\uff0cMIXED\u65e5\u5fd7\u683c\u5f0f\uff0c\u4f1a\u5728\u65e5\u5fd7\u4e2d\u4ea7\u751f\u5bf9\u5e94\u7684unix_timestamp()*1000\u7684\u65f6\u95f4\u5b57\u7b26\u4e32\uff0cslave\u5728\u5b8c\u6210\u540c\u6b65\u65f6\uff0c\u53d6\u7528\u7684\u662fsqlEvent\u53d1\u751f\u7684\u65f6\u95f4\u6765\u4fdd\u8bc1\u6570\u636e\u7684\u51c6\u786e\u6027\u3002\u53e6\u5916\u5bf9\u4e8e\u4e00\u4e9b\u529f\u80fd\u6027\u51fd\u6570slave\u80fd\u5b8c\u6210\u76f8\u5e94\u7684\u6570\u636e\u540c\u6b65\uff0c\u800c\u5bf9\u4e8e\u4e0a\u9762\u6307\u5b9a\u7684\u4e00\u4e9b\u7c7b\u4f3c\u4e8eUDF\u51fd\u6570\uff0c\u5bfc\u81f4Slave\u65e0\u6cd5\u77e5\u6653\u7684\u60c5\u51b5\uff0c\u5219\u4f1a\u91c7\u7528ROW\u683c\u5f0f\u5b58\u50a8\u8fd9\u4e9bBinlog\uff0c\u4ee5\u4fdd\u8bc1\u4ea7\u751f\u7684Binlog\u53ef\u4ee5\u4f9bSlave\u5b8c\u6210\u6570\u636e\u540c\u6b65\u3002<\/li>\n<\/ul>\n<h1>\u4e09\u3001redo\u65e5\u5fd7<\/h1>\n<h3>1. \u4ec0\u4e48\u662fredo\u65e5\u5fd7\uff1f<\/h3>\n<ul>\n<li>redo log\u53eb\u505a\u91cd\u505a\u65e5\u5fd7\uff0c\u662f\u7528\u6765\u5b9e\u73b0\u4e8b\u52a1\u7684\u6301\u4e45\u6027\u3002<\/li>\n<li>\u8be5\u65e5\u5fd7\u6587\u4ef6\u7531\u4e24\u90e8\u5206\u7ec4\u6210\uff1a\u91cd\u505a\u65e5\u5fd7\u7f13\u51b2\uff08redo log buffer\uff09\u4ee5\u53ca\u91cd\u505a\u65e5\u5fd7\u6587\u4ef6\uff08redo log\uff09\uff0c\u524d\u8005\u662f\u5728\u5185\u5b58\u4e2d\uff0c\u540e\u8005\u5728\u78c1\u76d8\u4e2d\u3002<\/li>\n<li>\u5f53\u4e8b\u52a1\u63d0\u4ea4\u4e4b\u540e\u4f1a\u628a\u6240\u6709\u4fee\u6539\u4fe1\u606f\u90fd\u4f1a\u5b58\u5230\u8be5\u65e5\u5fd7\u4e2d\u3002<\/li>\n<li>\u662fInnoDB\u5f15\u64ce\u72ec\u6709\u7684\u65e5\u5fd7\uff0c\u5c5e\u4e8e\u5b58\u50a8\u5f15\u64ce\u5c42\u65e5\u5fd7<\/li>\n<li>redo log\u7684\u5927\u5c0f\u662f\u56fa\u5b9a\u7684\uff0c\u5982\u4e0b\u56fe\uff1a<\/li>\n<\/ul>\n<div>\n<div>\n<div><\/div>\n<div data-width=\\\"466\\\" data-height=\\\"423\\\"><img src=\\\"https:\/\/upload-images.jianshu.io\/upload_images\/12320828-5b619696f43f769c.png?imageMogr2\/auto-orient\/strip|imageView2\/2\/w\/466\/format\/webp\\\" data-original-src=\\\"\/\/upload-images.jianshu.io\/upload_images\/12320828-5b619696f43f769c.png\\\" data-original-width=\\\"466\\\" data-original-height=\\\"423\\\" data-original-format=\\\"image\/png\\\" data-original-filesize=\\\"29454\\\" data-image-index=\\\"0\\\" \/><\/div>\n<\/div>\n<\/div>\n<p>\u8bf4\u660e\uff1a<br \/>\nwrite pos\u662f\u5f53\u524d\u8bb0\u5f55\u7684\u4f4d\u7f6e\uff0c\u4e00\u8fb9\u5199\u4e00\u8fb9\u540e\u79fb\uff0c\u5199\u5230\u672b\u5c3e\u53c8\u4ece\u5934\u5f00\u59cb<br \/>\ncheck point\u662f\u5f53\u524d\u8981\u64e6\u9664\u7684\u4f4d\u7f6e\uff0c\u540c\u6837\u4e5f\u662f\u5f80\u540e\u79fb\u52a8\u5e76\u4e14\u5faa\u73af\uff0c\u64e6\u9664\u8bb0\u5f55\uff0c\u5148\u628a\u65e5\u5fd7\u66f4\u65b0\u5230\u78c1\u76d8\u4e2d<br \/>\n\u5047\u8bbe\u6709\u4e24\u5f20\u8868\uff0c\u5982\u4e0b\u56fe\uff1a<\/p>\n<div>\n<div>\n<div><\/div>\n<div data-width=\\\"1280\\\" data-height=\\\"426\\\"><img src=\\\"https:\/\/upload-images.jianshu.io\/upload_images\/12320828-da6b28b21c7f7a00.png?imageMogr2\/auto-orient\/strip|imageView2\/2\/w\/1200\/format\/webp\\\" data-original-src=\\\"\/\/upload-images.jianshu.io\/upload_images\/12320828-da6b28b21c7f7a00.png\\\" data-original-width=\\\"1280\\\" data-original-height=\\\"426\\\" data-original-format=\\\"image\/png\\\" data-original-filesize=\\\"83305\\\" data-image-index=\\\"1\\\" \/><\/div>\n<\/div>\n<\/div>\n<p>\u73b0\u5728\u8981\u4ece\u94f6\u884c\u5361\u8d26\u6237\u8f6c400\u5757\u5230\u7406\u8d22\u8d26\u6237\u4e2d\uff0c\u4e8b\u52a1\u8fc7\u7a0b\u5982\u4e0b\uff1a<\/p>\n<div>\n<pre>start transaction;\nselect balance from bank where name=\\\"zhangsan\\\";\n\/\/ \u751f\u6210 \u91cd\u505a\u65e5\u5fd7 balance=600\nupdate bank set balance = balance - 400;\n\/\/ \u751f\u6210 \u91cd\u505a\u65e5\u5fd7 amount=400\nupdate finance set amount = amount + 400;\ncommit;\n<\/pre>\n<\/div>\n<p>\u4e0a\u8ff0\u4e8b\u52a1\u6d41\u7a0b\u56fe\u5982\u4e0b\uff1a<\/p>\n<div>\n<div>\n<div><\/div>\n<div data-width=\\\"1280\\\" data-height=\\\"603\\\"><img src=\\\"https:\/\/upload-images.jianshu.io\/upload_images\/12320828-7bebdd030bb06926.png?imageMogr2\/auto-orient\/strip|imageView2\/2\/w\/1200\/format\/webp\\\" data-original-src=\\\"\/\/upload-images.jianshu.io\/upload_images\/12320828-7bebdd030bb06926.png\\\" data-original-width=\\\"1280\\\" data-original-height=\\\"603\\\" data-original-format=\\\"image\/png\\\" data-original-filesize=\\\"155363\\\" data-image-index=\\\"2\\\" \/><\/div>\n<\/div>\n<div>\u4e8b\u52a1\u6d41\u7a0b\u56fe<\/div>\n<\/div>\n<h3>2. redo log \u6709\u4ec0\u4e48\u4f5c\u7528\uff1f<\/h3>\n<p>mysql \u4e3a\u4e86\u63d0\u5347\u6027\u80fd\u4e0d\u4f1a\u628a\u6bcf\u6b21\u7684\u4fee\u6539\u90fd\u5b9e\u65f6\u540c\u6b65\u5230\u78c1\u76d8\uff0c\u800c\u662f\u4f1a\u5148\u5b58\u5230Boffer Pool(\u7f13\u51b2\u6c60)\u91cc\u5934\uff0c\u628a\u8fd9\u4e2a\u5f53\u4f5c\u7f13\u5b58\u6765\u7528\u3002\u7136\u540e\u4f7f\u7528\u540e\u53f0\u7ebf\u7a0b\u53bb\u505a\u7f13\u51b2\u6c60\u548c\u78c1\u76d8\u4e4b\u95f4\u7684\u540c\u6b65\u3002<br \/>\n\u95ee\u9898\uff1a<br \/>\n\u4f46\u968f\u4e4b\u4e8c\u6765\u7684\u95ee\u9898\u662f\uff0c\u5982\u679c\u8fd8\u6ca1\u6765\u7684\u53ca\u540c\u6b65\u5c31\u53d1\u751f\u5b95\u673a\u6216\u65ad\u7535\u600e\u4e48\u529e\uff1f\u4e0a\u9762\u56fe\u4e2d\u7ea2\u8272\u7684\u64cd\u4f5c\u8fd8\u6ca1\u6765\u5f97\u53ca\u6267\u884c\uff0c\u8fd9\u6837\u4f1a\u5bfc\u81f4\u4e22\u5931\u90e8\u5206\u5df2\u63d0\u4ea4\u4e8b\u52a1\u7684\u4fee\u6539\u4fe1\u606f\uff01<br \/>\n\u89e3\u51b3\u65b9\u6cd5\uff1a<br \/>\n\u5f15\u5165\u4e86redo log\u6765\u8bb0\u5f55\u5df2\u6210\u529f\u63d0\u4ea4\u4e8b\u52a1\u7684\u4fee\u6539\u4fe1\u606f\uff0c\u5e76\u4e14\u4f1a\u628aredo log\u6301\u4e45\u5316\u5230\u78c1\u76d8\uff0c\u7cfb\u7edf\u91cd\u542f\u4e4b\u540e\u5728\u8bfb\u53d6redo log\u6062\u590d\u6700\u65b0\u6570\u636e\u3002<\/p>\n<h1>\u56db\u3001undo\u65e5\u5fd7<\/h1>\n<h3>1. \u4ec0\u4e48\u662fundo\u65e5\u5fd7\uff1f<\/h3>\n<ul>\n<li>undo log \u53eb\u505a\u56de\u6eda\u65e5\u5fd7\uff0c\u7528\u4e8e\u8bb0\u5f55\u6570\u636e\u88ab\u4fee\u6539\u524d\u7684\u4fe1\u606f\u3002<\/li>\n<li>\u6b63\u597d\u8ddf\u524d\u9762\u6240\u8bf4\u7684\u91cd\u505a\u65e5\u5fd7\u6240\u8bb0\u5f55\u7684\u76f8\u53cd\uff0c\u91cd\u505a\u65e5\u5fd7\u8bb0\u5f55\u6570\u636e\u88ab\u4fee\u6539\u540e\u7684\u4fe1\u606f\uff0cundo log\u4e3b\u8981\u8bb0\u5f55\u7684\u662f\u6570\u636e\u7684\u903b\u8f91\u53d8\u5316\uff0c\u4e3a\u4e86\u5728\u53d1\u751f\u9519\u8bef\u65f6\u56de\u6eda\u4e4b\u524d\u7684\u64cd\u4f5c\uff0c\u9700\u8981\u5c06\u4e4b\u524d\u7684\u64cd\u4f5c\u90fd\u8bb0\u5f55\u4e0b\u6765\uff0c\u7136\u540e\u5728\u53d1\u751f\u9519\u8bef\u65f6\u624d\u53ef\u4ee5\u56de\u6eda\u3002<\/li>\n<\/ul>\n<p>\u8fd8\u7528\u4e0a\u9762\u90a3\u4e24\u5f20\u8868\uff0c\u5982\u4e0b\u56fe\uff1a<\/p>\n<div>\n<div>\n<div><\/div>\n<div data-width=\\\"1280\\\" data-height=\\\"508\\\"><img src=\\\"https:\/\/upload-images.jianshu.io\/upload_images\/12320828-edb88ff3ec8df9df.png?imageMogr2\/auto-orient\/strip|imageView2\/2\/w\/1200\/format\/webp\\\" data-original-src=\\\"\/\/upload-images.jianshu.io\/upload_images\/12320828-edb88ff3ec8df9df.png\\\" data-original-width=\\\"1280\\\" data-original-height=\\\"508\\\" data-original-format=\\\"image\/png\\\" data-original-filesize=\\\"108084\\\" data-image-index=\\\"3\\\" \/><\/div>\n<\/div>\n<\/div>\n<p>\u6bcf\u6b21\u5199\u5165\u6570\u636e\u6216\u8005\u4fee\u6539\u6570\u636e\u4e4b\u524d\u90fd\u4f1a\u628a\u4fee\u6539\u524d\u7684\u4fe1\u606f\u8bb0\u5f55\u5230 undo log\u3002<\/p>\n<h3>2. undo log \u6709\u4ec0\u4e48\u4f5c\u7528\uff1f<\/h3>\n<p>undo log \u8bb0\u5f55\u4e8b\u52a1\u4fee\u6539\u4e4b\u524d\u7248\u672c\u7684\u6570\u636e\u4fe1\u606f\uff0c\u56e0\u6b64\u5047\u5982\u7531\u4e8e\u7cfb\u7edf\u9519\u8bef\u6216\u8005rollback\u64cd\u4f5c\u800c\u56de\u6eda\u7684\u8bdd\u53ef\u4ee5\u6839\u636eundo log\u7684\u4fe1\u606f\u6765\u8fdb\u884c\u56de\u6eda\u5230\u6ca1\u88ab\u4fee\u6539\u524d\u7684\u72b6\u6001\u3002<\/p>\n<h1>\u4e94\u3001\u4e00\u6761\u66f4\u65b0\u8bed\u53e5\u7684\u6267\u884c\u6d41\u7a0b\uff08\u65e5\u5fd7\u4e24\u6bb5\u63d0\u4ea4\uff09<\/h1>\n<div>\n<div>\n<div><\/div>\n<div data-width=\\\"455\\\" data-height=\\\"774\\\"><img src=\\\"https:\/\/upload-images.jianshu.io\/upload_images\/12320828-812e6fc0b4bb649e.png?imageMogr2\/auto-orient\/strip|imageView2\/2\/w\/455\/format\/webp\\\" data-original-src=\\\"\/\/upload-images.jianshu.io\/upload_images\/12320828-812e6fc0b4bb649e.png\\\" data-original-width=\\\"455\\\" data-original-height=\\\"774\\\" data-original-format=\\\"image\/png\\\" data-original-filesize=\\\"37399\\\" data-image-index=\\\"4\\\" \/><\/div>\n<\/div>\n<div>\u901a\u8fc7\u65e5\u5fd7\u4e24\u9636\u6bb5\u63d0\u4ea4\uff0c\u53ef\u4ee5\u4fdd\u8bc1redo log\u548cbin log\u7684\u903b\u8f91\u4e00\u81f4<\/div>\n<\/div>\n<h1>\u516d\u3001redo log\u8ddfbin log\u7684\u533a\u522b<\/h1>\n<ul>\n<li>redo log\u662fInnoDB\u7279\u6709\u7684\uff1b<br \/>\nbinlog\u662fServer\u5c42\u5b9e\u73b0\u7684\uff0c\u6240\u6709\u5b58\u50a8\u5f15\u64ce\u90fd\u53ef\u4ee5\u4f7f\u7528<\/li>\n<li>redo log\u662f\u7269\u7406\u65e5\u5fd7\uff0c\u8bb0\u5f55\u201c\u67d0\u4e2a\u6570\u636e\u9875\u4e0a\u7684\u4fee\u6539\u201d\uff1b<br \/>\nbinlog\u662f\u903b\u8f91\u65e5\u5fd7\uff0c\u8bb0\u5f55\u8bed\u53e5\u7684\u539f\u59cb\u903b\u8f91<\/li>\n<li>redo log\u662f\u5faa\u73af\u5199\u7684\uff0c\u7a7a\u95f4\u56fa\u5b9a\uff1b<br \/>\nbinlog\u662f\u53ef\u4ee5\u8ffd\u52a0\u5199\u5165\u7684\uff0c\u4e0d\u4f1a\u8986\u76d6\u4ee5\u524d\u7684\u65e5\u5fd7<\/li>\n<\/ul>\n<\/article>\n","protected":false},"excerpt":{"rendered":"<p>\u4e00\u3001MySQL\u5e38\u7528\u7684\u51e0\u79cd\u65e5\u5fd7 MySQL\u4e3b\u8981\u5305\u542b\u4ee5\u4e0b\u51e0\u79cd\u65e5\u5fd7\uff1a \u9519\u8bef\u65e5\u5fd7 \u67e5\u8be2\u65e5\u5fd7 \u6162\u67e5\u8be2\u65e5\u5fd7 \u4e8b\u52a1\u65e5\u5fd7 [u &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"\" href=\"http:\/\/www.weijing.co\/?p=1719\"> <span class=\"screen-reader-text\">MySQL\u4e4bbinlog\u65e5\u5fd7\u3001undo\u65e5\u5fd7\u3001redo\u65e5\u5fd7<\/span> \u67e5\u770b\u5168\u6587 &raquo;<\/a><\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"default","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":""},"categories":[90,88],"tags":[],"uagb_featured_image_src":{"full":false,"thumbnail":false,"medium":false,"medium_large":false,"large":false,"1536x1536":false,"2048x2048":false,"mailpoet_newsletter_max":false,"woocommerce_thumbnail":false,"woocommerce_single":false,"woocommerce_gallery_thumbnail":false,"shop_catalog":false,"shop_single":false,"shop_thumbnail":false},"uagb_author_info":{"display_name":"weijing","author_link":"http:\/\/www.weijing.co\/?author=4"},"uagb_comment_info":0,"uagb_excerpt":"\u4e00\u3001MySQL\u5e38\u7528\u7684\u51e0\u79cd\u65e5\u5fd7 MySQL\u4e3b\u8981\u5305\u542b\u4ee5\u4e0b\u51e0\u79cd\u65e5\u5fd7\uff1a \u9519\u8bef\u65e5\u5fd7 \u67e5\u8be2\u65e5\u5fd7 \u6162\u67e5\u8be2\u65e5\u5fd7 \u4e8b\u52a1\u65e5\u5fd7 [u&hellip;","_links":{"self":[{"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/posts\/1719"}],"collection":[{"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"http:\/\/www.weijing.co\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1719"}],"version-history":[{"count":0,"href":"http:\/\/www.weijing.co\/index.php?rest_route=\/wp\/v2\/posts\/1719\/revisions"}],"wp:attachment":[{"href":"http:\/\/www.weijing.co\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1719"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.weijing.co\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1719"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.weijing.co\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1719"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}