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.MuiTreeItem-iconContainer{margin-right:4px;width:15px;display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;-webkit-flex-shrink:0;-ms-flex-negative:0;flex-shrink:0;-webkit-box-pack:center;-ms-flex-pack:center;-webkit-justify-content:center;justify-content:center;}.css-khel7y .MuiTreeItem-iconContainer svg{font-size:18px;}.css-khel7y .MuiTreeItem-label{width:100%;min-width:0;padding-left:4px;position:relative;font-size:1rem;line-height:1.5rem;font-family:"Helvetica Neue","sans-serif";font-weight:400;font-style:normal;color:#666666;}</style><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><style data-emotion="css znl8a3">.css-znl8a3{display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;-webkit-flex-direction:row;-ms-flex-direction:row;flex-direction:row;min-height:1.75rem;-webkit-align-items:center;-webkit-box-align:center;-ms-flex-align:center;align-items:center;padding-left:0rem;padding-top:0.25rem;padding-bottom:0.25rem;}</style><div class="css-znl8a3"><style data-emotion="css tx8jsd">.css-tx8jsd{margin:0;font-size:1rem;line-height:1.5rem;font-family:"Helvetica Neue","sans-serif";font-weight:400;font-style:normal;color:#666666;}</style><a class="MuiTypography-root MuiTypography-body1 css-tx8jsd" target="_blank" href="https://docs.pingcap.com/zh" style="text-decoration:none;width:100%;color:inherit"><style data-emotion="css 8atqhb">.css-8atqhb{width:100%;}</style><div class="MuiBox-root css-8atqhb"><style data-emotion="css 1hwyipb">.css-1hwyipb{margin:0;font-size:1rem;line-height:1.5rem;font-family:"Helvetica Neue","sans-serif";font-weight:400;font-style:normal;color:#666666;color:inherit;font-size:0.875rem;line-height:1.25rem;}</style><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">文档中心</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-1" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-znl8a3"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">关于 TiDB</div></div><style data-emotion="css xjq79n">.css-xjq79n{-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;width:1em;height:1em;display:inline-block;fill:currentColor;-webkit-flex-shrink:0;-ms-flex-negative:0;flex-shrink:0;-webkit-transition:fill 200ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;transition:fill 200ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;font-size:1.5rem;fill:#999999;height:1rem;width:1rem;margin-left:auto;-webkit-transform:none;-moz-transform:none;-ms-transform:none;transform:none;}</style><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div><style data-emotion="css 1jozaee">.css-1jozaee{margin:0;padding:0;margin-left:17px;}</style></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-2" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-znl8a3"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">快速上手</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-3" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-znl8a3"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">部署集群</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-4" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-znl8a3"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">数据迁移</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-5" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-znl8a3"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">运维操作</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-6" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-znl8a3"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">监控与告警</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-7" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-znl8a3"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">故障诊断</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-8" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-znl8a3"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">性能调优</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-9" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-znl8a3"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">教程</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="true" id="left-nav-treeview-0-10" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content Mui-expanded" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-znl8a3"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">TiDB 工具</div></div><style data-emotion="css 171pefp">.css-171pefp{-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;width:1em;height:1em;display:inline-block;fill:currentColor;-webkit-flex-shrink:0;-ms-flex-negative:0;flex-shrink:0;-webkit-transition:fill 200ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;transition:fill 200ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;font-size:1.5rem;fill:#999999;height:1rem;width:1rem;margin-left:auto;-webkit-transform:rotate(90deg);-moz-transform:rotate(90deg);-ms-transform:rotate(90deg);transform:rotate(90deg);}</style><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-171pefp" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div><style data-emotion="css 1xxsnna">.css-1xxsnna{height:auto;overflow:visible;-webkit-transition:height 300ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;transition:height 300ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;margin:0;padding:0;margin-left:17px;}</style><ul class="MuiCollapse-root MuiCollapse-vertical MuiTreeItem-group MuiCollapse-entered css-1xxsnna" style="min-height:0px" role="group"><div class="MuiCollapse-wrapper MuiCollapse-vertical css-hboir5"><div class="MuiCollapse-wrapperInner MuiCollapse-vertical css-8atqhb"><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-10-0" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><style data-emotion="css kb2j4b">.css-kb2j4b{display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;-webkit-flex-direction:row;-ms-flex-direction:row;flex-direction:row;min-height:1.75rem;-webkit-align-items:center;-webkit-box-align:center;-ms-flex-align:center;align-items:center;padding-left:0.5rem;padding-top:0.25rem;padding-bottom:0.25rem;}</style><div class="css-kb2j4b"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/v4.0/ecosystem-tool-user-guide"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">功能概览</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-10-1" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-kb2j4b"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/v4.0/ecosystem-tool-user-case"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">适用场景</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-10-2" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-kb2j4b"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/v4.0/download-ecosystem-tools"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">工具下载</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-10-3" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-kb2j4b"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">TiUP</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-10-4" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-kb2j4b"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/v4.0/tidb-operator-overview"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">TiDB Operator</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-10-5" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-kb2j4b"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">Backup &amp; Restore (BR)</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-10-6" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-kb2j4b"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">TiDB Binlog</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-10-7" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-kb2j4b"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">TiDB Lightning</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-10-8" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-kb2j4b"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/v4.0/dm-overview"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">TiDB Data Migration</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-10-9" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-kb2j4b"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">TiCDC</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-10-10" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-kb2j4b"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/v4.0/dumpling-overview"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">Dumpling</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-10-11" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-kb2j4b"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">sync-diff-inspector</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-10-12" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-kb2j4b"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/v4.0/loader-overview"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">Loader</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-10-13" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-kb2j4b"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/v4.0/mydumper-overview"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">Mydumper</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-10-14" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content Mui-expanded" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-kb2j4b"><a aria-current="page" style="text-decoration:none;width:100%;color:inherit" class="" href="/zh/tidb/v4.0/syncer-overview"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">Syncer</div></div></a></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-10-15" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-kb2j4b"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">TiSpark</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li></div></div></ul></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-11" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-znl8a3"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">参考指南</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-12" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-znl8a3"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">常见问题解答 (FAQ)</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" aria-expanded="false" id="left-nav-treeview-0-13" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-znl8a3"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">版本发布历史</div></div><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeMedium MuiTreeItem-ChevronRightIcon css-xjq79n" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ChevronRightIcon"><path d="M10 6 8.59 7.41 13.17 12l-4.58 4.59L10 18l6-6z"/></svg></div></div></div></li><li class="MuiTreeItem-root css-1oy5rnm" role="treeitem" id="left-nav-treeview-0-14" tabindex="-1" style="margin-top:0.1875rem;margin-bottom:0.1875rem"><div class="css-khel7y MuiTreeItem-content" style="width:inherit"><div class="MuiTreeItem-iconContainer"/><div class="MuiTreeItem-label"><div class="css-znl8a3"><a style="text-decoration:none;width:100%;color:inherit" href="/zh/tidb/v4.0/glossary"><div class="MuiBox-root css-8atqhb"><div class="MuiTypography-root MuiTypography-body1 css-1hwyipb">术语表</div></div></a></div></div></div></li></ul></div></aside><style data-emotion="css sb2sd0">.css-sb2sd0{width:100%;}@media (min-width:1200px){.css-sb2sd0{max-width:calc(100% - 18.75rem);}}</style><main class="MuiBox-root css-sb2sd0"><style data-emotion="css 1rnnmjb">.css-1rnnmjb{max-width:1340px;width:100%;margin-left:auto;margin-right:auto;display:block;box-sizing:border-box;}</style><div class="MuiBox-root css-1rnnmjb"><style data-emotion="css 90fn5w">.css-90fn5w{display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;-webkit-flex-direction:column;-ms-flex-direction:column;flex-direction:column;}@media (min-width:0px){.css-90fn5w{-webkit-flex-direction:column-reverse;-ms-flex-direction:column-reverse;flex-direction:column-reverse;}}@media (min-width:600px){.css-90fn5w{-webkit-flex-direction:row;-ms-flex-direction:row;flex-direction:row;}}</style><div class="css-90fn5w"><style data-emotion="css vofosd">.css-vofosd{padding:1.5rem 0;}@media (min-width:0px){.css-vofosd{width:100%;}}@media (min-width:600px){.css-vofosd{width:calc(100% - 17.5rem);}}</style><div class="MuiBox-root css-vofosd"><style data-emotion="css 1ekb41w">.css-1ekb41w{width:100%;margin-left:auto;box-sizing:border-box;margin-right:auto;display:block;padding-left:16px;padding-right:16px;}@media (min-width:600px){.css-1ekb41w{padding-left:24px;padding-right:24px;}}@media (min-width:1536px){.css-1ekb41w{max-width:1536px;}}</style><div class="MuiContainer-root MuiContainer-maxWidthXl doc-content css-1ekb41w"><div class="markdown-body MuiBox-root css-0"><style data-emotion="css 1weqspv">.css-1weqspv{padding-top:0.5rem;padding-bottom:0.5rem;}.css-1weqspv .MuiAlert-message p{margin-bottom:0px;margin-top:0px;}</style><div class="MuiBox-root css-1weqspv"><style data-emotion="css 17zlexa">.css-17zlexa{font-size:0.875rem;line-height:1.25rem;font-family:"Helvetica Neue","sans-serif";font-weight:400;font-style:normal;color:rgb(1, 67, 97);background-color:rgb(229, 246, 253);display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;padding:6px 16px;}.css-17zlexa .MuiAlert-icon{color:#03a9f4;}</style><style data-emotion="css 152gid5">.css-152gid5{background-color:#fff;color:rgba(0, 0, 0, 0.87);-webkit-transition:box-shadow 300ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;transition:box-shadow 300ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;border-radius:4px;box-shadow:none;font-size:0.875rem;line-height:1.25rem;font-family:"Helvetica Neue","sans-serif";font-weight:400;font-style:normal;color:rgb(1, 67, 97);background-color:rgb(229, 246, 253);display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;padding:6px 16px;}.css-152gid5 .MuiAlert-icon{color:#03a9f4;}</style><div class="MuiPaper-root MuiPaper-elevation MuiPaper-rounded MuiPaper-elevation0 MuiAlert-root MuiAlert-standardInfo MuiAlert-standard css-152gid5" role="alert"><style data-emotion="css 1l54tgj">.css-1l54tgj{margin-right:12px;padding:7px 0;display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;font-size:22px;opacity:0.9;}</style><div class="MuiAlert-icon css-1l54tgj"><style data-emotion="css 1cw4hi4">.css-1cw4hi4{-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;width:1em;height:1em;display:inline-block;fill:currentColor;-webkit-flex-shrink:0;-ms-flex-negative:0;flex-shrink:0;-webkit-transition:fill 200ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;transition:fill 200ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;font-size:inherit;}</style><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeInherit css-1cw4hi4" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="InfoOutlinedIcon"><path d="M11,9H13V7H11M12,20C7.59,20 4,16.41 4,12C4,7.59 7.59,4 12,4C16.41,4 20,7.59 20, 12C20,16.41 16.41,20 12,20M12,2A10,10 0 0,0 2,12A10,10 0 0,0 12,22A10,10 0 0,0 22,12A10, 10 0 0,0 12,2M11,17H13V11H11V17Z"/></svg></div><style data-emotion="css 1xsto0d">.css-1xsto0d{padding:8px 0;min-width:0;overflow:auto;}</style><div class="MuiAlert-message css-1xsto0d"><style data-emotion="css 1h2y6o4">.css-1h2y6o4{font-weight:500;margin-top:-2px;}</style><style data-emotion="css 17ioyuk">.css-17ioyuk{margin:0;font-size:1rem;line-height:1.5rem;font-family:"Helvetica Neue","sans-serif";font-weight:400;font-style:normal;color:#666666;margin-bottom:0.35em;font-weight:500;margin-top:-2px;}</style><div class="MuiTypography-root MuiTypography-body1 MuiTypography-gutterBottom MuiAlertTitle-root css-17ioyuk">重要</div><p class="MuiTypography-root MuiTypography-body1 css-tx8jsd">你正在查看 TiDB 数据库的较旧版本 (TiDB v4.0) 的文档。如无特殊需求，建议使用 TiDB 数据库的<a hreflang="zh" href="/zh/tidb/stable">最新 LTS 版本</a>。</p></div></div></div><h1 id="syncer-使用文档" style="position:relative"><a href="#syncer-%E4%BD%BF%E7%94%A8%E6%96%87%E6%A1%A3" aria-label="syncer 使用文档 permalink" class="anchor before"><svg aria-hidden="true" focusable="false" height="16" version="1.1" viewbox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"/></svg></a>Syncer 使用文档</h1><div class="MuiBox-root css-1weqspv"><style data-emotion="css 1rl2db2">.css-1rl2db2{font-size:0.875rem;line-height:1.25rem;font-family:"Helvetica Neue","sans-serif";font-weight:400;font-style:normal;color:rgb(95, 33, 32);background-color:rgb(253, 237, 237);display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;padding:6px 16px;}.css-1rl2db2 .MuiAlert-icon{color:#ef5350;}</style><style data-emotion="css 21rxh6">.css-21rxh6{background-color:#fff;color:rgba(0, 0, 0, 0.87);-webkit-transition:box-shadow 300ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;transition:box-shadow 300ms cubic-bezier(0.4, 0, 0.2, 1) 0ms;border-radius:4px;box-shadow:none;font-size:0.875rem;line-height:1.25rem;font-family:"Helvetica Neue","sans-serif";font-weight:400;font-style:normal;color:rgb(95, 33, 32);background-color:rgb(253, 237, 237);display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;padding:6px 16px;}.css-21rxh6 .MuiAlert-icon{color:#ef5350;}</style><div class="MuiPaper-root MuiPaper-elevation MuiPaper-rounded MuiPaper-elevation0 MuiAlert-root MuiAlert-standardError MuiAlert-standard css-21rxh6" role="alert"><div class="MuiAlert-icon css-1l54tgj"><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeInherit css-1cw4hi4" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="ErrorOutlineIcon"><path d="M11 15h2v2h-2zm0-8h2v6h-2zm.99-5C6.47 2 2 6.48 2 12s4.47 10 9.99 10C17.52 22 22 17.52 22 12S17.52 2 11.99 2zM12 20c-4.42 0-8-3.58-8-8s3.58-8 8-8 8 3.58 8 8-3.58 8-8 8z"/></svg></div><div class="MuiAlert-message css-1xsto0d"><div class="MuiTypography-root MuiTypography-body1 MuiTypography-gutterBottom MuiAlertTitle-root css-17ioyuk">警告</div><p>Syncer 目前已经不再维护，其功能已经完全被 <a href="https://docs.pingcap.com/zh/tidb-data-migration/v1.0/overview" target="_blank" referrerpolicy="no-referrer-when-downgrade">TiDB Data Migration</a>取代，强烈建议切换到 TiDB DM。</p></div></div></div><h2 id="syncer-简介" style="position:relative"><a href="#syncer-%E7%AE%80%E4%BB%8B" aria-label="syncer 简介 permalink" class="anchor before"><svg aria-hidden="true" focusable="false" height="16" version="1.1" viewbox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"/></svg></a>Syncer 简介</h2><p>Syncer 是一个数据导入工具，能方便地将 MySQL 的数据增量导入到 TiDB。</p><p>Syncer 包含在 tidb-enterprise-tools 安装包中，可<a href="/zh/tidb/v4.0/download-ecosystem-tools">在此下载</a>。</p><h2 id="syncer-架构" style="position:relative"><a href="#syncer-%E6%9E%B6%E6%9E%84" aria-label="syncer 架构 permalink" class="anchor before"><svg aria-hidden="true" focusable="false" height="16" version="1.1" viewbox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"/></svg></a>Syncer 架构</h2><p><img src="https://download.pingcap.com/images/docs-cn/syncer-architecture.png" alt="Syncer 架构"/></p><h2 id="syncer-部署位置" style="position:relative"><a href="#syncer-%E9%83%A8%E7%BD%B2%E4%BD%8D%E7%BD%AE" aria-label="syncer 部署位置 permalink" class="anchor before"><svg aria-hidden="true" focusable="false" height="16" version="1.1" viewbox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"/></svg></a>Syncer 部署位置</h2><p>Syncer 可以部署在任一台可以连通对应的 MySQL 和 TiDB 集群的机器上，推荐部署在 TiDB 集群。</p><h2 id="syncer-增量导入数据示例" style="position:relative"><a href="#syncer-%E5%A2%9E%E9%87%8F%E5%AF%BC%E5%85%A5%E6%95%B0%E6%8D%AE%E7%A4%BA%E4%BE%8B" aria-label="syncer 增量导入数据示例 permalink" class="anchor before"><svg aria-hidden="true" focusable="false" height="16" version="1.1" viewbox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"/></svg></a>Syncer 增量导入数据示例</h2><p>使用前请详细阅读 <a href="#syncer-%E5%90%8C%E6%AD%A5%E5%89%8D%E6%A3%80%E6%9F%A5">Syncer 同步前预检查</a>。</p><h3 id="设置同步开始的-position" style="position:relative"><a href="#%E8%AE%BE%E7%BD%AE%E5%90%8C%E6%AD%A5%E5%BC%80%E5%A7%8B%E7%9A%84-position" aria-label="设置同步开始的 position permalink" class="anchor before"><svg aria-hidden="true" focusable="false" height="16" version="1.1" viewbox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"/></svg></a>设置同步开始的 position</h3><p>设置 Syncer 的 meta 文件, 这里假设 meta 文件是 <code>syncer.meta</code>:</p><pre><code class="language-bash">cat syncer.meta </code></pre><pre><code>binlog-name = "mysql-bin.000003" binlog-pos = 930143241 binlog-gtid = "2bfabd22-fff7-11e6-97f7-f02fa73bcb01:1-23,61ccbb5d-c82d-11e6-ac2e-487b6bd31bf7:1-4" </code></pre><div class="MuiBox-root css-1weqspv"><div class="MuiPaper-root MuiPaper-elevation MuiPaper-rounded MuiPaper-elevation0 MuiAlert-root MuiAlert-standardInfo MuiAlert-standard css-152gid5" role="alert"><div class="MuiAlert-icon css-1l54tgj"><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeInherit css-1cw4hi4" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="InfoOutlinedIcon"><path d="M11,9H13V7H11M12,20C7.59,20 4,16.41 4,12C4,7.59 7.59,4 12,4C16.41,4 20,7.59 20, 12C20,16.41 16.41,20 12,20M12,2A10,10 0 0,0 2,12A10,10 0 0,0 12,22A10,10 0 0,0 22,12A10, 10 0 0,0 12,2M11,17H13V11H11V17Z"/></svg></div><div class="MuiAlert-message css-1xsto0d"><div class="MuiTypography-root MuiTypography-body1 MuiTypography-gutterBottom MuiAlertTitle-root css-17ioyuk">注意</div><ul><li><code>syncer.meta</code> 只需要第一次使用的时候配置，后续 Syncer 同步新的 binlog 之后会自动将其更新到最新的 position。</li><li>如果使用 binlog position 同步则只需要配置 <code>binlog-name</code> 和 <code>binlog-pos</code>；如果使用 <code>binlog-gtid</code> 同步则需要设置 <code>binlog-gtid</code>，且启动 Syncer 时带有 <code>--enable-gtid</code>。</li></ul></div></div></div><h3 id="启动-syncer" style="position:relative"><a href="#%E5%90%AF%E5%8A%A8-syncer" aria-label="启动 syncer permalink" class="anchor before"><svg aria-hidden="true" focusable="false" height="16" version="1.1" viewbox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"/></svg></a>启动 Syncer</h3><p>Syncer 的命令行参数说明：</p><pre><code>Usage of Syncer: -L string 日志等级: debug, info, warn, error, fatal (默认为 "info") 输出 Syncer 版本；默认 false -auto-fix-gtid 当 mysql master/slave 切换时，自动修复 gtid 信息；默认 false -b int batch 事务大小 (默认 100) -c int Syncer 处理 batch 线程数 (默认 16) -config string 指定相应配置文件启动 Sycner 服务；如 `--config config.toml` -enable-ansi-quotes 使用 ANSI_QUOTES sql_mode 来解析 SQL 语句 -enable-gtid 使用 gtid 模式启动 Syncer；默认 false，开启前需要上游 MySQL 开启 GTID 功能 -flavor string 上游数据库实例类型，目前支持 "mysql" 和 "mariadb" -log-file string 指定日志文件目录；如 `--log-file ./syncer.log` -log-rotate string 指定日志切割周期, hour/day (默认 "day") -max-retry int SQL 请求由于网络异常等原因出错时的最大重试次数（默认值为 100） -meta string 指定 Syncer 上游 meta 信息文件 (默认与配置文件相同目录下 "syncer.meta") -persistent-dir string 指定同步过程中历史 schema 结构的保存文件地址，如果设置为空，则不保存历史 schema 结构；如果不为空，则根据 binlog 里面包含的数据的 column 长度选择 schema 来还原 DML 语句 -safe-mode 指定是否开启 safe mode，让 Syncer 在任何情况下可重入 -server-id int 指定 MySQL slave sever-id (默认 101) -status-addr string 指定 Syncer metric 信息; 如 `--status-addr 127:0.0.1:10088` -timezone string 目标数据库使用的时区，请使用 IANA 时区标识符，如 `Asia/Shanghai` </code></pre><p>Syncer 的配置文件 <code>config.toml</code>：</p><pre><code class="language-toml">log-level = "info" log-file = "syncer.log" log-rotate = "day" server-id = 101 ## meta 文件地址 meta = "./syncer.meta" worker-count = 16 batch = 100 flavor = "mysql" ## Prometheus 可以通过该地址拉取 Syncer metrics，也是 Syncer 的 pprof 调试地址 status-addr = ":8271" ## 如果设置为 true，Syncer 遇到 DDL 语句时就会停止退出 stop-on-ddl = false ## SQL 请求由于网络异常等原因出错时的最大重试次数 max-retry = 100 ## 指定目标数据库使用的时区，binlog 中所有 timestamp 字段会按照该时区进行转换，默认使用 Syncer 本地时区 # timezone = "Asia/Shanghai" ## 跳过 DDL 语句，格式为 **前缀完全匹配**，如：`DROP TABLE ABC` 至少需要填入 `DROP TABLE` # skip-ddls = ["ALTER USER", "CREATE USER"] ## 在使用 route-rules 功能后， ## replicate-do-db &amp; replicate-ignore-db 匹配合表之后 (target-schema &amp; target-table) 数值 ## 优先级关系: replicate-do-db --&gt; replicate-do-table --&gt; replicate-ignore-db --&gt; replicate-ignore-table ## 指定要同步数据库名；支持正则匹配，表达式语句必须以 `~` 开始 #replicate-do-db = ["~^b.*","s1"] ## 指定 **忽略** 同步数据库；支持正则匹配，表达式语句必须以 `~` 开始 #replicate-ignore-db = ["~^b.*","s1"] # skip-dmls 支持跳过 DML binlog events，type 字段的值可为：'insert'，'update' 和 'delete' # 跳过 foo.bar 表的所有 delete 语句 # [[skip-dmls]] # db-name = "foo" # tbl-name = "bar" # type = "delete" # 跳过所有表的 delete 语句 # [[skip-dmls]] # type = "delete" # 跳过 foo.* 表的 delete 语句 # [[skip-dmls]] # db-name = "foo" # type = "delete" ## 指定要同步的 db.table 表 ## db-name 与 tbl-name 不支持 `db-name ="dbname，dbname2"` 格式 #[[replicate-do-table]] #db-name ="dbname" #tbl-name = "table-name" #[[replicate-do-table]] #db-name ="dbname1" #tbl-name = "table-name1" ## 指定要同步的 db.table 表；支持正则匹配，表达式语句必须以 `~` 开始 #[[replicate-do-table]] #db-name ="test" #tbl-name = "~^a.*" ## 指定 **忽略** 同步数据库 ## db-name &amp; tbl-name 不支持 `db-name ="dbname，dbname2"` 语句格式 #[[replicate-ignore-table]] #db-name = "your_db" #tbl-name = "your_table" ## 指定要 **忽略** 同步数据库名；支持正则匹配，表达式语句必须以 `~` 开始 #[[replicate-ignore-table]] #db-name ="test" #tbl-name = "~^a.*" # sharding 同步规则，采用 wildcharacter # 1. 星号字符 (*) 可以匹配零个或者多个字符, # 例子, doc* 匹配 doc 和 document, 但是和 dodo 不匹配; # 星号只能放在 pattern 结尾，并且一个 pattern 中只能有一个 # 2. 问号字符 (?) 匹配任一一个字符 #[[route-rules]] #pattern-schema = "route_*" #pattern-table = "abc_*" #target-schema = "route" #target-table = "abc" #[[route-rules]] #pattern-schema = "route_*" #pattern-table = "xyz_*" #target-schema = "route" #target-table = "xyz" [from] host = "127.0.0.1" user = "root" password = "" port = 3306 host = "127.0.0.1" user = "root" password = "" port = 4000 </code></pre><p>启动 Syncer：</p><pre><code class="language-bash">./bin/syncer -config config.toml </code></pre><pre><code>2016/10/27 15:22:01 binlogsyncer.go:226: [info] begin to sync binlog from position (mysql-bin.000003, 1280) 2016/10/27 15:22:01 binlogsyncer.go:130: [info] register slave for master server 127.0.0.1:3306 2016/10/27 15:22:01 binlogsyncer.go:552: [info] rotate to (mysql-bin.000003, 1280) 2016/10/27 15:22:01 syncer.go:549: [info] rotate binlog to (mysql-bin.000003, 1280) </code></pre><h3 id="在-mysql-中插入新的数据" style="position:relative"><a href="#%E5%9C%A8-mysql-%E4%B8%AD%E6%8F%92%E5%85%A5%E6%96%B0%E7%9A%84%E6%95%B0%E6%8D%AE" aria-label="在 mysql 中插入新的数据 permalink" class="anchor before"><svg aria-hidden="true" focusable="false" height="16" version="1.1" viewbox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"/></svg></a>在 MySQL 中插入新的数据</h3><pre><code class="language-sql">INSERT INTO t1 VALUES (4, 4), (5, 5); </code></pre><p>登录到 TiDB 查看：</p><pre><code class="language-bash">mysql -h127.0.0.1 -P4000 -uroot -p </code></pre><pre><code class="language-sql">select * from t1; </code></pre><pre><code>+----+------+ | id | age | +----+------+ | 1 | 1 | | 2 | 2 | | 3 | 3 | | 4 | 4 | | 5 | 5 | +----+------+ </code></pre><p>Syncer 每隔 30s 会输出当前的同步统计，如下所示：</p><pre><code>2017/06/08 01:18:51 syncer.go:934: [info] [syncer]total events = 15, total tps = 130, recent tps = 4, master-binlog = (ON.000001, 11992), master-binlog-gtid=53ea0ed1-9bf8-11e6-8bea-64006a897c73:1-74, syncer-binlog = (ON.000001, 2504), syncer-binlog-gtid = 53ea0ed1-9bf8-11e6-8bea-64006a897c73:1-17 2017/06/08 01:19:21 syncer.go:934: [info] [syncer]total events = 15, total tps = 191, recent tps = 2, master-binlog = (ON.000001, 11992), master-binlog-gtid=53ea0ed1-9bf8-11e6-8bea-64006a897c73:1-74, syncer-binlog = (ON.000001, 2504), syncer-binlog-gtid = 53ea0ed1-9bf8-11e6-8bea-64006a897c73:1-35 </code></pre><p>由上述示例可见，使用 Syncer 可以自动将 MySQL 的更新同步到 TiDB。</p><h2 id="syncer-配置说明" style="position:relative"><a href="#syncer-%E9%85%8D%E7%BD%AE%E8%AF%B4%E6%98%8E" aria-label="syncer 配置说明 permalink" class="anchor before"><svg aria-hidden="true" focusable="false" height="16" version="1.1" viewbox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"/></svg></a>Syncer 配置说明</h2><h3 id="指定数据库同步" style="position:relative"><a href="#%E6%8C%87%E5%AE%9A%E6%95%B0%E6%8D%AE%E5%BA%93%E5%90%8C%E6%AD%A5" aria-label="指定数据库同步 permalink" class="anchor before"><svg aria-hidden="true" focusable="false" height="16" version="1.1" viewbox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"/></svg></a>指定数据库同步</h3><p>本部分将通过实际案例描述 Syncer 同步数据库参数的优先级关系。</p><ul><li>如果使用 route-rules 规则，参考 <a href="#sharding-%E5%90%8C%E6%AD%A5%E6%94%AF%E6%8C%81">Sharding 同步支持</a></li><li>优先级：replicate-do-db --&gt; replicate-do-table --&gt; replicate-ignore-db --&gt; replicate-ignore-table</li></ul><pre><code class="language-toml"># 指定同步 ops 数据库 # 指定同步以 ti 开头的数据库 replicate-do-db = ["ops","~^ti.*"] # china 数据库下有 guangzhou / shanghai / beijing 等多张表，只同步 shanghai 与 beijing 表。 # 指定同步 china 数据库下 shanghai 表 [[replicate-do-table]] db-name ="china" tbl-name = "shanghai" # 指定同步 china 数据库下 beijing 表 [[replicate-do-table]] db-name ="china" tbl-name = "beijing" # ops 数据库下有 ops_user / ops_admin / weekly 等数据表，只需要同步 ops_user 表。 # 因 replicate-do-db 优先级比 replicate-do-table 高，所以此处设置只同步 ops_user 表无效，实际工作会同步 ops 整个数据库 [[replicate-do-table]] db-name ="ops" tbl-name = "ops_user" # history 数据下有 2017_01 2017_02 ... 2017_12 / 2016_01 2016_02 ... 2016_12 等多张表，只需要同步 2017 年的数据表 [[replicate-do-table]] db-name ="history" tbl-name = "~^2017_.*" # 忽略同步 ops 与 fault 数据库 # 忽略同步以 www 开头的数据库 ## 因 replicate-do-db 优先级比 replicate-ignore-db 高，所以此处忽略同步 ops 不生效。 replicate-ignore-db = ["ops","fault","~^www"] # fault 数据库下有 faults / user_feedback / ticket 等数据表 # 忽略同步 user_feedback 数据表 # 因 replicate-ignore-db 优先级比 replicate-ignore-table 高，所以此处设置只忽略同步 user_feedback 表无效，实际工作会忽略同步 fault 整个数据库 [[replicate-ignore-table]] db-name = "fault" tbl-name = "user_feedback" # order 数据下有 2017_01 2017_02 ... 2017_12 / 2016_01 2016_02 ... 2016_12 等多张表，忽略 2016 年的数据表 [[replicate-ignore-table]] db-name ="order" tbl-name = "~^2016_.*" </code></pre><h3 id="sharding-同步支持" style="position:relative"><a href="#sharding-%E5%90%8C%E6%AD%A5%E6%94%AF%E6%8C%81" aria-label="sharding 同步支持 permalink" class="anchor before"><svg aria-hidden="true" focusable="false" height="16" version="1.1" viewbox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"/></svg></a>Sharding 同步支持</h3><p>根据配置文件的 route-rules，支持将分库分表的数据导入到同一个库同一个表中，但是在开始前需要检查分库分表规则，如下：</p><ul><li>是否可以利用 route-rules 的语义规则表示</li><li>分表中是否包含唯一递增主键，或者合并后是否包含数据上有冲突的唯一索引或者主键</li></ul><p>暂时对 DDL 支持不完善。</p><p><img src="https://download.pingcap.com/images/docs-cn/syncer-sharding.png" alt="sharding"/></p><h4 id="分库分表同步示例" style="position:relative"><a href="#%E5%88%86%E5%BA%93%E5%88%86%E8%A1%A8%E5%90%8C%E6%AD%A5%E7%A4%BA%E4%BE%8B" aria-label="分库分表同步示例 permalink" class="anchor before"><svg aria-hidden="true" focusable="false" height="16" version="1.1" viewbox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"/></svg></a>分库分表同步示例</h4><ol><li>只需在所有 MySQL 实例下面，启动 Syncer, 并设置 route-rules。</li><li><code>replicate-do-db</code> &amp; <code>replicate-ignore-db</code> 与 route-rules 同时使用场景下，<code>replicate-do-db</code> &amp; <code>replicate-ignore-db</code> 需要指定 route-rules 中 <code>target-schema</code> &amp; <code>target-table</code> 的内容。</li></ol><pre><code class="language-toml"># 场景如下: # 数据库A 下有 order_2016 / history_2016 等多个数据库 # 数据库B 下有 order_2017 / history_2017 等多个数据库 # 指定同步数据库A order_2016 数据库，数据表如下 2016_01 2016_02 ... 2016_12 # 指定同步数据库B order_2017 数据库，数据表如下 2017_01 2017_02 ... 2017_12 # 表内使用 order_id 作为主键，数据之间主键不冲突 # 忽略同步 history_2016 与 history_2017 数据库 # 目标库需要为 order ，目标数据表为 order_2017 / order_2016 # Syncer 获取到上游数据后，发现 route-rules 规则启用，先做合库合表操作，再进行 do-db &amp; do-table 判定 ## 此处需要设置 target-schema &amp; target-table 判定需要同步的数据库 [[replicate-do-table]] db-name ="order" tbl-name = "order_2016" [[replicate-do-table]] db-name ="order" tbl-name = "order_2017" [[route-rules]] pattern-schema = "order_2016" pattern-table = "2016_??" target-schema = "order" target-table = "order_2016" [[route-rules]] pattern-schema = "order_2017" pattern-table = "2017_??" target-schema = "order" target-table = "order_2017" </code></pre><h3 id="syncer-同步前检查" style="position:relative"><a href="#syncer-%E5%90%8C%E6%AD%A5%E5%89%8D%E6%A3%80%E6%9F%A5" aria-label="syncer 同步前检查 permalink" class="anchor before"><svg aria-hidden="true" focusable="false" height="16" version="1.1" viewbox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"/></svg></a>Syncer 同步前检查</h3><ol><li><p>检查数据库版本。</p><p>使用 <code>select @@version;</code> 命令检查数据库版本。目前，Syncer 只支持以下版本：</p><ul><li>5.5 &lt; MySQL 版本 &lt; 8.0</li><li>MariaDB 版本 &gt;= 10.1.2（更早版本的 binlog 部分字段类型格式与 MySQL 不一致）</li></ul><div class="MuiBox-root css-1weqspv"><div class="MuiPaper-root MuiPaper-elevation MuiPaper-rounded MuiPaper-elevation0 MuiAlert-root MuiAlert-standardInfo MuiAlert-standard css-152gid5" role="alert"><div class="MuiAlert-icon css-1l54tgj"><svg class="MuiSvgIcon-root MuiSvgIcon-fontSizeInherit css-1cw4hi4" focusable="false" aria-hidden="true" viewbox="0 0 24 24" data-testid="InfoOutlinedIcon"><path d="M11,9H13V7H11M12,20C7.59,20 4,16.41 4,12C4,7.59 7.59,4 12,4C16.41,4 20,7.59 20, 12C20,16.41 16.41,20 12,20M12,2A10,10 0 0,0 2,12A10,10 0 0,0 12,22A10,10 0 0,0 22,12A10, 10 0 0,0 12,2M11,17H13V11H11V17Z"/></svg></div><div class="MuiAlert-message css-1xsto0d"><div class="MuiTypography-root MuiTypography-body1 MuiTypography-gutterBottom MuiAlertTitle-root css-17ioyuk">注意</div><p>如果上游 MySQL/MariaDB server 间构成主从复制结构，则</p><ul><li>5.7.1 &lt; MySQL 版本 &lt; 8.0</li><li>MariaDB 版本 &gt;= 10.1.3</li></ul></div></div></div></li><li><p>检查源库 <code>server-id</code>。</p><p>可通过以下命令查看 <code>server-id</code>：</p><pre><code class="language-sql">show global variables like 'server_id'; </code></pre><pre><code>+---------------+-------+ | Variable_name | Value | +---------------+-------+ | server_id | 1 | +---------------+-------+ 1 row in set (0.01 sec) </code></pre><ul><li>结果为空或者为 0，Syncer 无法同步数据。</li><li>Syncer <code>server-id</code> 与 MySQL <code>server-id</code> 不能相同，且必须在 MySQL cluster 中唯一。</li></ul></li><li><p>检查 Binlog 相关参数。</p><ol><li><p>检查 MySQL 是否开启了 binlog。</p><p>使用如下命令确认是否开启了 binlog：</p><pre><code class="language-sql">show global variables like 'log_bin'; </code></pre><pre><code>+--------------------+---------+ | Variable_name | Value | +--------------------+---------+ | log_bin | ON | +--------------------+---------+ 1 row in set (0.00 sec) </code></pre><p>如果结果是 <code>log_bin</code> = <code>OFF</code>，则需要开启 binlog，开启方式请参考<a href="https://dev.mysql.com/doc/refman/5.7/en/replication-howto-masterbaseconfig.html" target="_blank" referrerpolicy="no-referrer-when-downgrade">官方文档</a>。</p></li><li><p>binlog 格式必须为 <code>ROW</code>，且参数 <code>binlog_row_image</code> 必须设置为 <code>FULL</code>，可使用如下命令查看参数设置：</p><pre><code class="language-sql">select variable_name, variable_value from information_schema.global_variables where variable_name in ('binlog_format','binlog_row_image'); </code></pre><pre><code>+------------------+----------------+ | variable_name | variable_value | +------------------+----------------+ | BINLOG_FORMAT | ROW | | BINLOG_ROW_IMAGE | FULL | +------------------+----------------+ 2 rows in set (0.001 sec) </code></pre><ul><li>如果以上设置出现错误，则需要修改磁盘上的配置文件，然后重启 MySQL。</li><li>将配置的更改持久化存储在磁盘上很重要，这样在 MySQL 重启之后才能显示相应更改。</li><li>由于现有的连接会保留全局变量原先的值，所以<strong>不可以</strong>使用 <code>SET</code> 语句动态修改这些设置。</li></ul></li></ol></li><li><p>检查用户权限。</p><ol><li><p>全量导出的 Mydumper 需要的用户权限。</p><ul><li>Mydumper 导出数据至少拥有以下权限：<code>select, reload</code>。</li><li>Mydumper 操作对象为 RDS 时，可以添加 <code>--no-locks</code> 参数，避免申请 <code>reload</code> 权限。</li></ul></li><li><p>增量同步 Syncer 需要的上游 MySQL/MariaDB 用户权限。</p><p>需要上游 MySQL 同步账号至少赋予以下权限：</p><pre><code>select, replication slave, replication client </code></pre></li><li><p>下游 TiDB 需要的权限</p><table><thead><tr><th align="right">权限</th><th align="left">作用域</th></tr></thead><tbody><tr><td align="right">SELECT</td><td align="left">Tables</td></tr><tr><td align="right">INSERT</td><td align="left">Tables</td></tr><tr><td align="right">UPDATE</td><td align="left">Tables</td></tr><tr><td align="right">DELETE</td><td align="left">Tables</td></tr><tr><td align="right">CREATE</td><td align="left">Databases,tables</td></tr><tr><td align="right">DROP</td><td align="left">Databases, tables</td></tr><tr><td align="right">ALTER</td><td align="left">Tables</td></tr><tr><td align="right">INDEX</td><td align="left">Tables</td></tr></tbody></table><p>为所同步的数据库或者表，执行下面的 GRANT 语句：</p><pre><code class="language-sql">GRANT SELECT,INSERT,UPDATE,DELETE,CREATE,DROP,ALTER,INDEX ON db.table TO 'your_user'@'your_wildcard_of_host'; </code></pre></li></ol></li><li><p>检查 SQL mode。</p><p>必须确认上下游的 SQL mode 一致；如果不一致，则会出现数据同步的错误。</p><pre><code class="language-sql">show variables like '%sql_mode%'; </code></pre><pre><code>+---------------+-----------------------------------------------------------------------------------+ | Variable_name | Value | +---------------+-----------------------------------------------------------------------------------+ | sql_mode | ONLY_FULL_GROUP_BY,STRICT_TRANS_TABLES,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION | +---------------+-----------------------------------------------------------------------------------+ 1 row in set (0.01 sec) </code></pre></li><li><p>检查字符集。</p><p>TiDB 和 MySQL 的字符集的兼容性不同，详见 <a href="/zh/tidb/v4.0/character-set-and-collation">TiDB 支持的字符集</a>。</p></li><li><p>检查同步的表是否都有主键或者唯一索引。</p><p>如果表没有主键或唯一索引，就没法实现幂等，并且此时在下游更新每条数据时都是扫全表，可能导致同步速度变慢，所以建议同步的表都加上主键。</p></li></ol><h2 id="监控方案" style="position:relative"><a href="#%E7%9B%91%E6%8E%A7%E6%96%B9%E6%A1%88" aria-label="监控方案 permalink" class="anchor before"><svg aria-hidden="true" focusable="false" height="16" version="1.1" viewbox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"/></svg></a>监控方案</h2><p>Syncer 使用开源时序数据库 Prometheus 作为监控和性能指标信息存储方案，使用 Grafana 作为可视化组件进行展示，配合 AlertManager 来实现报警。其方案如下图所示：</p><p><img src="https://download.pingcap.com/images/docs-cn/syncer-monitor-scheme.png" alt="monitor_scheme"/></p><h3 id="配置-syncer-监控与告警" style="position:relative"><a href="#%E9%85%8D%E7%BD%AE-syncer-%E7%9B%91%E6%8E%A7%E4%B8%8E%E5%91%8A%E8%AD%A6" aria-label="配置 syncer 监控与告警 permalink" class="anchor before"><svg aria-hidden="true" focusable="false" height="16" version="1.1" viewbox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"/></svg></a>配置 Syncer 监控与告警</h3><p>Syncer 对外提供 metric 接口，需要 Prometheus 主动获取数据。配置 Syncer 监控与告警的操作步骤如下：</p><ol><li><p>在 Prometheus 中添加 Syncer job 信息，将以下内容刷新到 Prometheus 配置文件，重启 Prometheus 后生效。</p><pre><code class="language-yaml"> - job_name: 'syncer_ops' // 任务名字，区分数据上报 static_configs: - targets: ['10.1.1.4:10086'] // Syncer 监听地址与端口，通知 Prometheus 获取 Syncer 的监控数据。 </code></pre></li><li><p>配置 Prometheus <a href="https://prometheus.io/docs/alerting/alertmanager/" target="_blank" referrerpolicy="no-referrer-when-downgrade">告警</a>，将以下内容刷新到 <code>alert.rule</code> 配置文件，重启 Prometheus 后生效。</p><pre><code># syncer ALERT syncer_status IF syncer_binlog_file{node='master'} - ON(instance, job) syncer_binlog_file{node='syncer'} &gt; 1 FOR 1m