{"id":514,"date":"2021-07-28T20:34:15","date_gmt":"2021-07-28T12:34:15","guid":{"rendered":"https:\/\/egonlin.com\/?p=514"},"modified":"2022-04-26T11:57:09","modified_gmt":"2022-04-26T03:57:09","slug":"mysql%e4%ba%8b%e5%8a%a1%e4%b8%ad%e7%9a%84redo%e4%b8%8eundo","status":"publish","type":"post","link":"https:\/\/egonlin.com\/?p=514","title":{"rendered":"MySQL\u4e8b\u52a1\u4e2d\u7684redo\u4e0eundo"},"content":{"rendered":"<h1>MySQL\u4e8b\u52a1\u4e2d\u7684redo\u4e0eundo<\/h1>\n<h2>\u4e00 \u524d\u8a00<\/h2>\n<p>\u200b   \u4f17\u6240\u5468\u77e5<strong>InnoDB \u662f\u4e00\u4e2a\u4e8b\u52a1\u6027\u7684\u5b58\u50a8\u5f15\u64ce<\/strong>\uff0c\u5728\u4e0a\u4e00\u5c0f\u8282\u6211\u4eec\u63d0\u5230\u4e8b\u52a1\u67094\u79cd\u7279\u6027\uff1a\u539f\u5b50\u6027\u3001\u4e00\u81f4\u6027\u3001\u9694\u79bb\u6027\u548c\u6301\u4e45\u6027\uff0c\u5728\u4e8b\u52a1\u4e2d\u7684\u64cd\u4f5c\uff0c\u8981\u4e48\u5168\u90e8\u6267\u884c\uff0c\u8981\u4e48\u5168\u90e8\u4e0d\u505a\uff0c\u8fd9\u5c31\u662f\u4e8b\u52a1\u7684\u76ee\u7684\u3002<\/p>\n<p>\u200b   \u90a3\u4e48\u4e8b\u52a1\u7684\u56db\u79cd\u7279\u6027\u5230\u5e95\u662f\u57fa\u4e8e\u4ec0\u4e48\u673a\u5236\u5b9e\u73b0\u5462\uff1f\uff1f\uff1f<\/p>\n<ul>\n<li>\n<p>1\u3001\u4e8b\u52a1\u7684\u539f\u5b50\u6027\u3001\u9694\u79bb\u6027\u7531\u9501\u673a\u5236\u5b9e\u73b0\uff0c\u6211\u4eec\u5c06\u5728\u540e\u7eed\u7ae0\u8282\u300a\u6570\u636e\u5e93\u9501\u673a\u5236\u300b\u4e2d\u4ecb\u7ecd<\/p>\n<\/li>\n<li>\n<p>2\u3001\u800c\u4e8b\u52a1\u7684\u4e00\u81f4\u6027\u548c\u6301\u4e45\u6027\u7531\u4e8b\u52a1\u7684 redo \u65e5\u5fd7\u548cundo \u65e5\u5fd7\u6765\u4fdd\u8bc1\u3002<\/p>\n<pre><code>redo log \u662f\u91cd\u505a\u65e5\u5fd7\uff0c\u63d0\u4f9b\u518d\u5199\u5165\u64cd\u4f5c\uff0c\u5b9e\u73b0\u4e8b\u52a1\u7684\u6301\u4e45\u6027\uff1b\nundo log \u662f\u56de\u6eda\u65e5\u5fd7\uff0c\u63d0\u4f9b\u56de\u6eda\u64cd\u4f5c\uff0c\u4fdd\u8bc1\u4e8b\u52a1\u7684\u4e00\u81f4\u6027\u3002<\/code><\/pre>\n<\/li>\n<\/ul>\n<p>\u672c\u6587\u5c06\u8ba8\u8bba\u5173\u4e8e\u4e8b\u52a1\u4e2d\u7684redo\u548cundo\u7684\u51e0\u4e2a\u95ee\u9898\uff1a<\/p>\n<ul>\n<li>redo \u65e5\u5fd7\u4e0eundo\u65e5\u5fd7\u5206\u522b\u7528\u4e8e\u8bb0\u5f55\u4ec0\u4e48\uff1f<\/li>\n<li>redo \u5982\u4f55\u4fdd\u8bc1\u4e8b\u52a1\u7684\u6301\u4e45\u6027\uff1f<\/li>\n<li>undo \u5982\u4f55\u4fdd\u8bc1\u4e8b\u52a1\u7684\u4e00\u81f4\u6027\uff1f<\/li>\n<li>undo log \u662f\u5426\u662fredo log\u7684\u9006\u8fc7\u7a0b\uff1f<\/li>\n<\/ul>\n<h2>\u4e8c Redo log<\/h2>\n<h3>2.1 redo\u7684\u4f5c\u7528<\/h3>\n<p>\u8bb0\u5f55\u7684\u662f\u5c1a\u672a\u5b8c\u6210\u7684\u64cd\u4f5c\uff0c\u6570\u636e\u5e93\u5d29\u6e83\u5219\u7528\u5176\u91cd\u505a<\/p>\n<h3>2.2 redo\u7684\u7ec4\u6210<\/h3>\n<p>Redo log\u53ef\u4ee5\u7b80\u5355\u5206\u4e3a\u4ee5\u4e0b\u4e24\u4e2a\u90e8\u5206\uff1a<\/p>\n<ul>\n<li>\u4fdd\u5b58\u5728\u5185\u5b58\u4e2d\u91cd\u505a\u65e5\u5fd7\u7684\u7f13\u51b2 (redo log buffer),\u662f\u6613\u5931\u7684<\/li>\n<li>\u4fdd\u5b58\u5728\u786c\u76d8\u4e2d\u91cd\u505a\u65e5\u5fd7\u6587\u4ef6 (redo log file)\uff0c\u662f\u6301\u4e45\u7684<\/li>\n<\/ul>\n<h3>2.3 redo\u5de5\u4f5c\u6d41\u7a0b<\/h3>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/egonlin.com\/wp-content\/uploads\/2021\/07\/16-1.png'><img class=\"lazyload lazyload-style-2\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  data-original=\"https:\/\/egonlin.com\/wp-content\/uploads\/2021\/07\/16-1.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" \/><\/div><\/p>\n<p><strong>InnoDB \u7684\u66f4\u65b0\u64cd\u4f5c\u91c7\u7528\u7684\u662f Write Ahead Log (\u9884\u5148\u65e5\u5fd7\u6301\u4e45\u5316)\u7b56\u7565\uff0c\u5373\u5148\u5199\u65e5\u5fd7\uff0c\u518d\u5199\u5165\u78c1\u76d8\u3002<\/strong><\/p>\n<p>\u5f53\u4e00\u6761\u8bb0\u5f55\u66f4\u65b0\u65f6\uff0credo\u6d41\u7a0b\u5927\u81f4\u5982\u4e0b<\/p>\n<p>\u5728\u5185\u5b58\u66f4\u65b0\u6570\u636e\u540e\uff0c\u4f1a\u628a\u66f4\u65b0\u540e\u7684\u8bb0\u5f55\u5199\u5165\u5230 redo log buffer \u4e2d\u3002<\/p>\n<pre><code>\u7b2c\u4e00\u6b65\uff1aInnoDB \u4f1a\u5148\u628a\u8bb0\u5f55\u4ece\u786c\u76d8\u8bfb\u5165\u5185\u5b58\n\u7b2c\u4e8c\u90e8\uff1a\u4fee\u6539\u6570\u636e\u7684\u5185\u5b58\u62f7\u8d1d\n\u7b2c\u4e09\u6b65\uff1a\u751f\u6210\u4e00\u6761\u91cd\u505a\u65e5\u5fd7\u5e76\u5199\u5165redo log buffer\uff0c\u8bb0\u5f55\u7684\u662f\u6570\u636e\u88ab\u4fee\u6539\u540e\u7684\u503c\n\u7b2c\u56db\u6b65\uff1a\u5f53\u4e8b\u52a1commit\u65f6\uff0c\u5c06redo log buffer\u4e2d\u7684\u5185\u5bb9\u5237\u65b0\u5230 redo log file\uff0c\u5bf9 redo log file\u91c7\u7528\u8ffd\u52a0\u5199\u7684\u65b9\u5f0f\n\u7b2c\u4e94\u6b65\uff1a\u5b9a\u671f\u5c06\u5185\u5b58\u4e2d\u4fee\u6539\u7684\u6570\u636e\u5237\u65b0\u5230\u78c1\u76d8\u4e2d(\u6ce8\u610f\u6ce8\u610f\u6ce8\u610f\uff0c\u4e0d\u662f\u4eceredo log file\u5237\u5165\u78c1\u76d8\uff0c\u800c\u662f\u4ece\u5185\u5b58\u5237\u5165\u78c1\u76d8\uff0credo log file\u53ea\u5728\u5d29\u6e83\u6062\u590d\u6570\u636e\u65f6\u624d\u7528)\uff0c\u5982\u679c\u6570\u636e\u5e93\u5d29\u6e83\uff0c\u5219\u4f9d\u636eredo log buffer\u3001redo log file\u8fdb\u884c\u91cd\u505a\uff0c\u6062\u590d\u6570\u636e,\u8fd9\u624d\u662fredo log file\u7684\u4ef7\u503c\u6240\u5728<\/code><\/pre>\n<h3>2.4 Write Ahead Log<\/h3>\n<p>redo\u662f\u5982\u4f55\u4fdd\u8bc1\u4e8b\u52a1\u7684\u6301\u4e45\u6027\u7684\u5462\uff1f\uff1f\uff1f<\/p>\n<p>\u7b54\u6848\u662f<strong>Force Log at Commit \u673a\u5236<\/strong>\uff0c\u5373\u5f53\u4e8b\u52a1commit\u63d0\u4ea4\u65f6\uff0cinnodb\u5f15\u64ce\u5148\u5c06 redo log buffer \u5199\u5165\u5230 redo log file \u8fdb\u884c\u6301\u4e45\u5316\uff0c\u5f85\u4e8b\u52a1\u7684commit\u64cd\u4f5c\u5b8c\u6210\u65f6\u624d\u7b97\u5b8c\u6210\u3002\u8fd9\u79cd\u505a\u6cd5\u4e5f\u88ab\u79f0\u4e3a <strong>Write-Ahead Log(\u9884\u5148\u65e5\u5fd7\u6301\u4e45\u5316)<\/strong>\uff0c\u5728\u6301\u4e45\u5316\u4e00\u4e2a\u6570\u636e\u9875\u4e4b\u524d\uff0c\u5148\u5c06\u5185\u5b58\u4e2d\u76f8\u5e94\u7684\u65e5\u5fd7\u9875\u6301\u4e45\u5316\u3002<\/p>\n<p>\u95ee\u98981\uff1a\u4e3a\u4f55\u4e0d\u76f4\u63a5\u5c06\u4fee\u6539\u7684\u6570\u636e\u5199\u5165\u78c1\u76d8\uff0c\u800c\u662f\u8981write ahead log\u5462\uff1f<\/p>\n<pre><code>\u7b54\u6848\uff1a\u7528\u4e8e\u5d29\u6e83\u6062\u590d\n\u8be6\u89e3\uff1a\nundo\u65e5\u5fd7\u662f\u5bf9\u539f\u59cb\u6570\u636e\u7684\u5907\u4efd\nredo\u65e5\u5fd7\u662f\u5bf9\u539f\u59cb\u6570\u636e\u7684\u4fee\u6539\n\n\u539f\u59cb\u6570\u636e\u7684\u6309\u7167\u65e2\u5b9a\u7684\u6570\u636e\u7ed3\u6784\u5b58\u653e\u5728\u78c1\u76d8\u4e0a\uff0c\u5199\u5165\u78c1\u76d8\u662f\u8981\u8017\u8d39\u5de8\u5927\u6210\u672c\u7684\uff0c\u800c\u5199\u5165redo\u76f8\u5bf9\u5bb9\u6613\u4e00\u4e9b\uff0c\u56e0\u4e3aredo\u91cc\u6bd5\u7adf\u53ea\u9700\u8981\u8003\u8651\u5b58\u653e\u6539\u52a8\u7684\u6570\u636e\u5373\u53ef\uff0c\u6240\u4ee5\u5185\u5b58\u6570\u636e\u5199\u5199\u5165redo log file\uff0c\u7136\u540e\u5185\u5b58\u6570\u636e\u624d\u80fd\u5199\u5165\u78c1\u76d8\uff0c\u5982\u6b64\uff0c\u5728\u5185\u5b58\u6570\u636e\u518d\u5199\u5165\u78c1\u76d8\u65f6\u56e0\u4e3a\u67d0\u79cd\u539f\u56e0\u6bd4\u5982\u65ad\u7535\u5d29\u6e83\uff0c\u90a3\u4e48\u8fd8\u53ef\u4ee5\u4f9d\u636eredo log file\u6062\u590d\u6570\u636e\uff0c\u5982\u4e0b\u56fe\u6240\u793a\u3002<\/code><\/pre>\n<p><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/egonlin.com\/wp-content\/uploads\/2021\/07\/21-886x1024.png'><img class=\"lazyload lazyload-style-2\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  data-original=\"https:\/\/egonlin.com\/wp-content\/uploads\/2021\/07\/21-886x1024.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" \/><\/div><\/p>\n<p>\u95ee\u98982\uff1a\u5982\u4f55\u4fdd\u8bc1\u6bcf\u6b21\u4fee\u6539\u7684\u6570\u636e\u90fd\u80fd\u5199\u5165redo log file\u5462\uff1f<\/p>\n<pre><code class=\"language-bash\"># \u50a8\u5907\u77e5\u8bc61\nO_DIRECT\u9009\u9879\u662f\u5728Linux\u7cfb\u7edf\u4e2d\u7684\u9009\u9879\uff0c\u4f7f\u7528\u8be5\u9009\u9879\u540e\uff0c\u5bf9\u6587\u4ef6\u8fdb\u884c\u76f4\u63a5IO\u64cd\u4f5c\uff0c\u4e0d\u7ecf\u8fc7\u6587\u4ef6\u7cfb\u7edf\u7f13\u5b58\uff0c\u76f4\u63a5\u5199\u5165\u78c1\u76d8\n\n# \u50a8\u5907\u77e5\u8bc62\nredo log\u53c8\u79f0\u4e4b\u4e3a\u91cd\u505a\u65e5\u5fd7\uff0c\u56e0\u91cd\u505a\u65e5\u5fd7\u6253\u5f00\u5e76\u6ca1\u6709O_DIRECT\u9009\u9879\uff0c\u6240\u4ee5\u91cd\u505a\u65e5\u5fd7\u5148\u5199\u5165\u5230\u6587\u4ef6\u7cfb\u7edf\u7f13\u5b58\uff0c\u7136\u540e\u624d\u4f1a\u5237\u5165\u786c\u76d8\uff0c\u5373\nRedo log buffer---&gt;os cache(\u6587\u4ef6\u7cfb\u7edf\u7f13\u5b58)---&gt;redo log file\n\n\u5982\u679c\u5728\u5237\u5165redo log file\u524d\u65ad\u7535\uff0c\u5219\u4f1a\u4e22\u5931\u6587\u4ef6\u7cfb\u7edf\u7f13\u5b58\u4e2d\u6570\u636e\uff0c\u6570\u636e\u672a\u5199\u5165redo log file\uff0c\n\u56e0\u4e3a\u7531\u5185\u5b58\u5199\u5165redo log file\u5728\u524d\uff0c\u800c\u7531\u5185\u5b58\u5199\u5165\u78c1\u76d8\u5728\u540e\uff0c\u6240\u4ee5redo log file\u5199\u5165\u5931\u8d25\uff0c\u5219\u6570\u636e\u4e22\u5931\n\n# \u90a3\u5982\u4f55\u4fdd\u8bc1\u6bcf\u6b21\u7684\u4fee\u6539\u90fd\u8bb0\u5165\u65e5\u5fd7\u6587\u4ef6redo log file\u5462\uff1f\uff1f\uff1f\n\u7b54\u6848\u662ffsync\u64cd\u4f5c\n\u5728\u6bcf\u6b21\u5c06redo buffer\u5199\u5165os cache\u6587\u4ef6\u7cfb\u7edf\u7f13\u5b58\u540e\uff0cInnoDB\u5b58\u50a8\u5f15\u64ce\u90fd\u9700\u8981\u8c03\u7528\u4e00\u6b21 fsync\u64cd\u4f5c,\u4fdd\u8bc1\u7acb\u5373\u7531os cache\u6587\u4ef6\u7cfb\u7edf\u7f13\u5b58\u5199\u5165redo log file\n\nfsync\u662f\u4e00\u79cd\u7cfb\u7edf\u8c03\u7528\u64cd\u4f5c\uff0c\u5176fsync\u7684\u6548\u7387\u53d6\u51b3\u4e8e\u78c1\u76d8\u7684\u6027\u80fd\uff0c\u56e0\u6b64\u78c1\u76d8\u7684\u6027\u80fd\u4e5f\u5f71\u54cd\u4e86\u4e8b\u52a1\u63d0\u4ea4\u7684\u6027\u80fd\uff0c\u4e5f\u5c31\u662f\u6570\u636e\u5e93\u7684\u6027\u80fd\u3002<\/code><\/pre>\n<p>\u95ee\u98983\uff1a\u810f\u9875\u4f55\u65f6\u5237\u5165\u78c1\u76d8\u5462\uff1f<\/p>\n<pre><code class=\"language-bash\"># \u50a8\u5907\u77e5\u8bc6\uff1a\u810f\u9875\nBuffer Pool \u4e2d\u66f4\u65b0\u7684\u6570\u636e\u672a\u5237\u65b0\u5230\u78c1\u76d8\u4e2d\uff0c\u8be5\u5185\u5b58\u9875\u6211\u4eec\u79f0\u4e4b\u4e3a\u810f\u9875\u3002\u6700\u7ec8\u810f\u9875\u7684\u6570\u636e\u4f1a\u5237\u65b0\u5230\u78c1\u76d8\u4e2d\uff0c\u5c06\u78c1\u76d8\u4e2d\u7684\u6570\u636e\u8986\u76d6\uff0c\u8fd9\u4e2a\u8fc7\u7a0b\u4e0e redo log \u4e0d\u4e00\u5b9a\u6709\u5173\u7cfb\u3002\n\n# \u7b54\u6848\nredo log \u65e5\u5fd7\u6ee1\u4e86\u7684\u60c5\u51b5\u4e0b\uff0c\u4f1a\u4e3b\u52a8\u89e6\u53d1\u810f\u9875\u5237\u65b0\u5230\u78c1\u76d8<\/code><\/pre>\n<p>\u95ee\u98984\uff1a\u810f\u9875\u53ea\u5728redo log\u6ee1\u7684\u60c5\u51b5\u4e0b\u624d\u4f1a\u5237\u5165\u78c1\u76d8\u5417\uff1f<\/p>\n<pre><code class=\"language-bash\">\u7b54\u6848\uff1ano\uff0c\u4ee5\u4e0b\u51e0\u79cd\u60c5\u51b5\u540c\u6837\u4f1a\u89e6\u53d1\u810f\u9875\u7684\u5237\u65b0\n\n- 1\u3001\u7cfb\u7edf\u5185\u5b58\u4e0d\u8db3\u65f6\uff0c\u9700\u8981\u5c06\u4e00\u90e8\u5206\u6570\u636e\u9875\u6dd8\u6c70\u6389\uff0c\u5982\u679c\u6dd8\u6c70\u7684\u662f\u810f\u9875\uff0c\u9700\u8981\u5148\u5c06\u810f\u9875\u540c\u6b65\u5230\u78c1\u76d8\uff1b\n- 2\u3001MySQL \u8ba4\u4e3a\u7a7a\u95f2\u7684\u65f6\u95f4\uff0c\u8fd9\u79cd\u60c5\u51b5\u6ca1\u6709\u6027\u80fd\u95ee\u9898\uff1b\n- 3\u3001MySQL \u6b63\u5e38\u5173\u95ed\u4e4b\u524d\uff0c\u4f1a\u628a\u6240\u6709\u7684\u810f\u9875\u5237\u5165\u5230\u78c1\u76d8\uff0c\u8fd9\u79cd\u60c5\u51b5\u4e5f\u6ca1\u6709\u6027\u80fd\u95ee\u9898\u3002<\/code><\/pre>\n<p>\u95ee\u98985\uff1a\u810f\u9875\u5237\u5165\u4f1a\u5e26\u6765\u6027\u80fd\u95ee\u9898\u5417\uff1f<\/p><div id=\"rml_readmorelogin_placeholder\" style=\"position:relative;\"><div id=\"rml_fade_content\" style=\"position: absolute;\r\ntop:-10em;\r\nwidth:100%;\r\nheight:10em;\r\nbackground: -webkit-linear-gradient(rgba(255, 255, 255, 0) 0%,#ffffff 100%);\r\nbackground-image: -moz-linear-gradient(rgba(255, 255, 255, 0) 0%,#ffffff 100%);\r\nbackground-image: -o-linear-gradient(rgba(255, 255, 255, 0) 0%,#ffffff 100%);\r\nbackground-image: linear-gradient(rgba(255, 255, 255, 0) 0%,#ffffff 100%);\r\nbackground-image: -ms-linear-gradient(rgba(255, 255, 255, 0) 0%,#ffffff 100%);\"><\/div><div class=\"wpf-controller aru_rml_from_in_post\" style=\"background-color:#eeeeee;border:5px solid #cce6ff;\" id=\"ARU_ReadMoreLogin_ReadMoreLoginController\"><h2 id=\"Header\">\u67e5\u770b\u66f4\u591a<\/h2><div id=\"Message\"><p>\u8054\u7cfb\u7ba1\u7406\u5458\u5fae\u4fe1tutu19192010\uff0c\u6ce8\u518c\u8d26\u53f7<\/p>\n<\/div><div id=\"StatusBarHeader\"><\/div><form id=\"ARU_ReadMoreLogin_ReadMoreLoginController\"><input name=\"post_id\" value=\"514\" type=\"hidden\"\/><input name=\"_init_callback\" value=\"InitLogin\" type=\"hidden\"\/><input name=\"post_id\" value=\"514\" type=\"hidden\"\/><input name=\"rt_ype\" value=\"1\" type=\"hidden\"\/><input name=\"nonce\" value=\"b8c7a5fdd9\" type=\"hidden\"\/><input name=\"_wpnonce\" value=\"2d1dcda414\" type=\"hidden\"\/><input name=\"_controller\" value=\"ARU_ReadMoreLogin\\ReadMoreLoginController\" type=\"hidden\"\/><input name=\"_proxy_controller\" value=\"ARU_ReadMoreLogin\\ReadMoreLoginController\" type=\"hidden\"\/><input name=\"_view\" value=\"ARU_ReadMoreLogin\\ReadMoreLoginView\" type=\"hidden\"\/><table class=\"wpf-table-placeholder\"><tbody class=\"wpf-table-placeholder\"><tr class=\"wpf-table-placeholder\"><td class=\"wpf-table-placeholder-input\" width=\"400px\"><table class=\"wpf-table-placeholder\"><tbody class=\"wpf-table-placeholder\"><tr class=\"wpf-table-placeholder\"><th class=\"wpf-table-placeholder-input\"><label class=\"wpf-label\">Username:<\/label><\/th><\/tr><tr class=\"wpf-table-placeholder\"><td class=\"wpf-table-placeholder-input\"><input class=\"regular-text text_input\" name=\"username\" value=\"\" type=\"text\"\/><\/td><\/tr><tr class=\"wpf-table-placeholder\"><th class=\"wpf-table-placeholder-input\"><label class=\"wpf-label\">Password:<\/label><\/th><\/tr><tr class=\"wpf-table-placeholder\"><td class=\"wpf-table-placeholder-input\"><input class=\"regular-text text_input\" name=\"password\" value=\"\" type=\"password\"\/><\/td><\/tr><\/tbody><\/table><p class=\"wpf-table-placeholder submit\"><button class=\"wp_plugin_framework_ajax_button\" type=\"button\" style=\"background-color:#4D90FE;;color:#ffffff;;border:1px solid #3079ed;\" name=\"_event\" value=\"ButtonLogin\">Log in<\/button><\/p><\/td><td class=\"wpf-table-placeholder-input\"><\/td><\/tr><\/tbody><\/table><\/form><div id=\"ButtonStartRegister\"><a href=\"https:\/\/egonlin.com\/wp-login.php?action=register\">Register<\/a><\/div><div id=\"Link1\"><a href=\"https:\/\/egonlin.com\/wp-login.php?action=lostpassword\">Forgotten username or password?<\/a><\/div><div id=\"StatusBarFooter\"><\/div><\/div><\/div><div id=aru_remaining_content><\/div>","protected":false},"excerpt":{"rendered":"<p>MySQL\u4e8b\u52a1\u4e2d\u7684redo\u4e0eundo \u4e00 \u524d\u8a00 \u200b \u4f17\u6240\u5468\u77e5InnoDB \u662f\u4e00\u4e2a\u4e8b\u52a1\u6027\u7684\u5b58\u50a8\u5f15\u64ce\uff0c\u5728\u4e0a\u4e00\u5c0f\u8282\u6211 [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":517,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[85],"tags":[21,19,99,22,100,20],"_links":{"self":[{"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/posts\/514"}],"collection":[{"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/egonlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=514"}],"version-history":[{"count":0,"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/posts\/514\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/media\/517"}],"wp:attachment":[{"href":"https:\/\/egonlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=514"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/egonlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=514"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/egonlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=514"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}