ticdc: update doc #21138
ticdc: update doc #21138
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Signed-off-by: dongmen <[email protected]>
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| | v6.5.x - v7.1.x | 4000 | | ||
| | v7.5.x - v8.5.x | 40000 | | ||
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| 需要注意的是，如果你同步的表是分区表，那么每一个分区表都被 TiCDC 视为一张表，因此需要将分区表的数量也计算在内。如果你需要同步的表超过这个范围，建议你使用 TiCDC 新架构。 |
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提一下新架构的优化吧，比如如果想要同步更多表，建议使用新架构（带上页面链接）
Signed-off-by: dongmen <[email protected]>
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| 例如：当通过 changefeed 配置了过滤所有 DDL 事件后，如果上游执行 `DROP COLUMN` 操作后继续写入涉及该列的 `INSERT` 语句，TiCDC 同步这些 DML 变更到下游时，会因下游表结构不同而导致数据写入失败。 | ||
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| - 老架构的 TiCDC 集群同步表的数量较为有限，当一个 TiCDC 集群中同步的表数量超过建议值之后，TiCDC 可能无法正常工作，下面是具体建议数值： |
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| - 老架构的 TiCDC 集群同步表的数量较为有限，当一个 TiCDC 集群中同步的表数量超过建议值之后，TiCDC 可能无法正常工作，下面是具体建议数值： | |
| - 对于 TiCDC [老架构](/ticdc/ticdc-classic-architecture.md)，当单个 TiCDC 集群同步的表数量超过以下建议值时，TiCDC 可能无法稳定工作： | |
| | v6.5.x - v7.1.x | 4000 | | ||
| | v7.5.x - v8.5.x | 40000 | | ||
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| 需要注意的是，如果你同步的表是分区表，那么每一个分区表都被 TiCDC 视为一张表，因此需要将分区表的数量也计算在内。如果你需要同步的表超过这个范围，建议你使用 TiCDC 新架构，新架构 TiCDC 可以支持一个 changefeed 同步超过百万张表。[TiCDC 新架构](/ticdc/ticdc-architecture.md) |
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| 需要注意的是，如果你同步的表是分区表，那么每一个分区表都被 TiCDC 视为一张表，因此需要将分区表的数量也计算在内。如果你需要同步的表超过这个范围，建议你使用 TiCDC 新架构，新架构 TiCDC 可以支持一个 changefeed 同步超过百万张表。[TiCDC 新架构](/ticdc/ticdc-architecture.md) | |
| > **注意:** | |
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| > 如果同步的是分区表，TiCDC 会将每个分区视为一张独立的表，因此在计算同步表的数量时会将分区数量也计算在内。 | |
| 如果需要同步的表数量超过以上建议值，建议使用 [TiCDC 新架构](/ticdc/ticdc-architecture.md)。新架构单个 Changefeed 支持同步超过百万张表，适用于大规模同步场景。 |
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