cdc: add cyclic replication doc#3666
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Signed-off-by: Neil Shen <overvenus@gmail.com>
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Signed-off-by: Neil Shen <overvenus@gmail.com>
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PTAL, thanks! |
amyangfei
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| {{< copyable "shell-regular" >}} | ||
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| ```shell | ||
| # 在 TiDB 集群 A 上创建表数据表。 |
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| # 在 TiDB 集群 A 上创建表数据表。 | |
| # 在 TiDB 集群 A 上创建标记数据表。 |
ditto for following two comments
| --pd="http://${PD_B_HOST}:${PD_B_PORT}" \ | ||
| --cyclic-replica-id 2 \ | ||
| --cyclic-filter-replica-ids 3 \ | ||
| --cyclic-sync-ddl false |
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这里和示例图不一致，B 也是需要开启 sync-ddl 的？
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| ### 环形同步使用限制 | ||
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| 1. 环形复制功能使用到的表急表必须在创建环形同步任务前使用 `cdc cli changefeed cyclic create-marktables` 创建。 |
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| 1. 环形复制功能使用到的表急表必须在创建环形同步任务前使用 `cdc cli changefeed cyclic create-marktables` 创建。 | |
| 1. 环形复制功能使用到的标记表必须在创建环形同步任务前使用 `cdc cli changefeed cyclic create-marktables` 创建。 |
| 3. 开启环形复制的数据表表必须在创建环形同步任务前创建完毕。 | ||
| 4. 开启环形复制后，不能创建一个会被环形同步任务同步的表。 | ||
| 5. 如果想在线 DDL，需要确保： | ||
| 1. 多个集群中有且仅有一个集群的 CDC(s) 开启了 cyclic-sync-ddl，例如示例中的 A 集群 CDC |
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在线 DDL 是需要保证“构成一个单向同步链表，不能成环” ？
Signed-off-by: Neil Shen <overvenus@gmail.com>
Signed-off-by: Neil Shen <overvenus@gmail.com>
lilin90
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Jun 17, 2020
Co-authored-by: Lilian Lee <lilin@pingcap.com>
Signed-off-by: Neil Shen <overvenus@gmail.com>
Signed-off-by: Neil Shen <overvenus@gmail.com>
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/merge |
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cherry pick to release-4.0 in PR #3700 |
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Signed-off-by: ti-srebot <ti-srebot@pingcap.com> Co-authored-by: Neil Shen <overvenus@gmail.com>
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What is changed, added or deleted? (Required)
Add document about TiCDC cyclic replication feature.
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What is the related PR or file link(s)?