https://docs.pingcap.com/tidb/stable/ticdc-compatibility/#compatibility-with-tiflash
Currently, when you use TiCDC to replicate tables to a downstream TiDB cluster, creating TiFlash replicas for the tables is not supported, which means that TiCDC does not support replicating TiFlash-related DDL statements, such as:
ALTER TABLE table_name SET TIFLASH REPLICA count;
ALTER DATABASE db_name SET TIFLASH REPLICA count;
It is better we can provide a tool for compare the difference of tiflash replica number for blue-gree upgrade clusters. So that the user can know which tables they should set tiflash replica for the "green cluster".
https://docs.pingcap.com/tidb/stable/ticdc-compatibility/#compatibility-with-tiflash
Currently, when you use TiCDC to replicate tables to a downstream TiDB cluster, creating TiFlash replicas for the tables is not supported, which means that TiCDC does not support replicating TiFlash-related DDL statements, such as:
ALTER TABLE table_name SET TIFLASH REPLICA count;
ALTER DATABASE db_name SET TIFLASH REPLICA count;
It is better we can provide a tool for compare the difference of tiflash replica number for blue-gree upgrade clusters. So that the user can know which tables they should set tiflash replica for the "green cluster".