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ticdc: update best practices (pingcap#15516) (pingcap#15523)
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ti-chi-bot authored Nov 28, 2023
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Expand Up @@ -70,7 +70,7 @@ TiCDC 作为 TiDB 的增量数据同步工具,通过 PD 内部的 etcd 实现
- 主键 (`PRIMARY KEY`) 为有效索引。
- 唯一索引 (`UNIQUE INDEX`) 中每一列在表结构中明确定义非空 (`NOT NULL`) 且不存在虚拟生成列 (`VIRTUAL GENERATED COLUMNS`)。

- 容灾场景下使用 TiCDC 需要配置 [redo log](/ticdc/ticdc-sink-to-mysql.md#灾难场景的最终一致性复制) 实现最终一致性
- 在使用 TiCDC 实现容灾的场景下,为实现最终一致性,需要配置 [redo log](/ticdc/ticdc-sink-to-mysql.md#灾难场景的最终一致性复制) 并确保 redo log 写入的存储系统在上游发生灾难时可以正常读取

> **注意:**
>
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