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ticdc: add example of how to show bdr role (#16393) #16394

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Feb 4, 2024
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ticdc: add example of how to show bdr role (#16393) #16394

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eef9456
add example of how to show bdr role
asddongmen Jan 29, 2024
31cc8ac
fix the indent issue
qiancai Jan 29, 2024
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16 changes: 15 additions & 1 deletion ticdc/ticdc-bidirectional-replication.md
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Expand Up @@ -100,7 +100,21 @@ TiCDC 复制功能只会将指定时间点之后的增量变更复制到下游

### 可复制的 DDL 的同步场景

1. 选择一个 TiDB 集群，执行 `ADMIN SET BDR ROLE PRIMARY` 将其设置为主集群。
1. 选择一个 TiDB 集群，执行 `ADMIN SET BDR ROLE PRIMARY` 将其设置为主集群。如下所示：

```sql
ADMIN SET BDR ROLE PRIMARY;
Query OK, 0 rows affected
Time: 0.003s

ADMIN SHOW BDR ROLE;
+----------+
| BDR_ROLE |
+----------+
| primary |
+----------+
```

2. 在其他 TiDB 集群上，执行 `ADMIN SET BDR ROLE SECONDARY` 将其设置为从集群。
3. 在主集群上执行**可复制的 DDL**，执行成功的 DDL 会被 TiCDC 同步到从集群中。

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5 changes: 5 additions & 0 deletions ticdc/ticdc-changefeed-config.md
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Expand Up @@ -66,6 +66,11 @@ case-sensitive = false
# 默认值和 TiDB 的默认 SQL 模式一致
# sql-mode = "ONLY_FULL_GROUP_BY,STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION"

# 默认值为 false，表示不处于 BDR 模式。
# 如果要使用 TiCDC 搭建 BDR 集群，需要将该参数设置为 true，同时要将 TiDB 集群设置为 BDR 模式。
# 详情请参考：https://docs.pingcap.com/zh/tidb/stable/ticdc-bidirectional-replication#ticdc-双向复制
# bdr-mode = false

[mounter]
# mounter 解码 KV 数据的线程数，默认值为 16
# worker-num = 16
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