/tags/backup/Recent content in Backup on C4HHugozh-CNcode4happy@gmail.com (happy-v587)code4happy@gmail.com (happy-v587)Thu, 04 Feb 2021 16:31:04 +0800/xtrabackup-bei-fen-yuan-li-yu-shi-xian/Thu, 04 Feb 2021 16:31:04 +0800code4happy@gmail.com (happy-v587)/xtrabackup-bei-fen-yuan-li-yu-shi-xian/<blockquote> <p>本文由原作者归档自 CSDN，原文发布于 2021-02-04。原文链接：<a href="https://blog.csdn.net/LIUHUAN0520/article/details/113653749" target="_blank" rel="noopener noreferrer">xtrabackup备份原理与实现</a>。</p> </blockquote><h2 id="预备知识" class="headerLink"> <a href="#%e9%a2%84%e5%a4%87%e7%9f%a5%e8%af%86" class="header-mark"></a>预备知识</h2><p>xtrabackup备份时，为了保证数据的一致性，会执行以下几个sql来保证位点的准确。</p> <div class="code-block highlight is-open show-line-numbers tw-group tw-my-2"> <div class=" tw-flex tw-flex-row tw-flex-1 tw-justify-between tw-w-full tw-bg-bgColor-secondary "> <button class=" code-block-button tw-mx-2 tw-flex tw-flex-row tw-flex-1" aria-hidden="true"> <div class="group-[.is-open]:tw-rotate-90 tw-transition-[transform] tw-duration-500 tw-ease-in-out print:!tw-hidden tw-w-min tw-h-min tw-my-1 tw-mx-1"><svg class="icon" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 320 512"><!-- Font Awesome Free 5.15.4 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) --><path d="M285.476 272.971L91.132 467.314c-9.373 9.373-24.569 9.373-33.941 0l-22.667-22.667c-9.357-9.357-9.375-24.522-.04-33.901L188.505 256 34.484 101.255c-9.335-9.379-9.317-24.544.04-33.901l22.667-22.667c9.373-9.373 24.569-9.373 33.941 0L285.475 239.03c9.373 9.372 9.373 24.568.001 33.941z"/></svg></div> <p class="tw-select-none !tw-my-1">text</p>/mysqldump-yin-fa-shu-ju-ku-bu-ke-du-xie/Tue, 26 Jan 2021 13:01:38 +0800code4happy@gmail.com (happy-v587)/mysqldump-yin-fa-shu-ju-ku-bu-ke-du-xie/<blockquote> <p>本文由原作者归档自知乎，原文发布于 2021-01-26。原文链接：<a href="https://zhuanlan.zhihu.com/p/347105199" target="_blank" rel="noopener noreferrer">mysqldump引发数据库不可读写的血案</a>。</p> </blockquote><h2 id="问题" class="headerLink"> <a href="#%e9%97%ae%e9%a2%98" class="header-mark"></a>问题</h2><p>一直认为mysql在dump时候加上 &ndash;single-transaction 就不会影响业务，除非有DDL同时在操作同一张表。但是最近发现即是没有DDL也有锁表情况，慢日志记录详情如下：</p>